#linuxcnc | Logs for 2018-07-02

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[01:00:30] <Laminae> Hey amigos, could i get some feedback on a design i whipped up for an extrusion bed for my open builds cbeam xl cnc router mod?
[01:00:49] <jesseg> always you can try
[01:01:01] <Laminae> Take a peek https://a360.co
[01:01:04] <XXCoder> there is no try. only do, or don't do
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[01:01:50] <Laminae> I think i need some center reinforcement but i have tons of oddball extrusions laying around and i thought i'd just use one of those
[01:02:09] <Laminae> These are the parts https://us.misumi-ec.com
[01:02:18] <Laminae> https://us.misumi-ec.com
[01:02:30] <Laminae> sweet jesus that is a url
[01:02:53] <XXCoder> using extusions as bed
[01:03:37] <Laminae> Yep, 15x250
[01:04:10] <jesseg> Maybe it's the rise and the fall of the top raman empire, url coded
[01:04:13] <Laminae> final bed dimension is 500mm x 1000mm
[01:04:26] <Laminae> 900mm*
[01:04:59] <Laminae> This is the frame i'm slapping it on https://openbuildspartstore.com
[01:07:48] <Laminae> Coder, aren't you in #Reprap?
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[01:24:31] <hazzy-lab> lol jesseg
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[01:27:45] <fragalot> Laminae: any reason why you're sticking to 15mm thick bed rails, rather than something more substantial?
[01:27:52] <fragalot> oh well I timed that right didn't I
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[01:50:12] <CaptHindsight> mebe he be lernin by doin
[01:50:43] <CaptHindsight> when it don't work, he'll be a wonderin why
[01:51:00] <CaptHindsight> then mebe he done learn somthin then
[01:53:19] <CaptHindsight> plues he be usin MDF to be supportin the bed rails
[01:53:35] <CaptHindsight> so it be a might stiffen than nothin
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[01:56:42] <XXCoder> dunno
[01:56:47] <XXCoder> as long as mdf is sealed
[01:56:54] <CaptHindsight> laminae: 5mm aluminum angle is pretty light
[01:57:24] <CaptHindsight> I rekin that you kin build it and see what happens
[01:57:49] <CaptHindsight> then when you be seein what it don't be doin right, yah kins fix it
[01:58:39] <CaptHindsight> XXCoder: moisture adds mass :)
[01:59:11] <XXCoder> and brittleness heh
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[02:08:33] <laminae> Yeah, that's kind of my concern too, i'm hoping that the plates paired with a 20x20 rail in the center would be a enough for rigidity, but i ordsred them now anyway so i guess i'm going to make it work one way or the other now haha
[02:10:50] <XXCoder> it really depends on your usercase
[02:10:55] <XXCoder> it cuts metal?
[02:13:19] * Loetmichel_ just drove the BMW convertible with open canopy to the company... and with wet hair... WHAT a hair knot now... like felt ;)
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[02:19:32] <laminae> primarily plastics/wood
[02:19:52] <laminae> perhaps thin 6061 in a pinch
[02:21:20] <RyanS> some people pay a lot of money to have felt on their heat
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[02:23:09] <RyanS> felt hair out of shape; just steam it and bash it into a fedora
[02:23:37] <Loetmichel> RyanS: sounds like a plan... a bit short for that these days though.
[02:23:46] <Loetmichel> http://www.cyrom.org
[02:24:16] <Loetmichel> ... could have worked 20 years ago... -> http://www.cyrom.org
[02:24:17] <Loetmichel> :-)
[02:27:47] <RyanS> looks like you're welding a Christmas tree
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[03:25:58] <Snoozer77> Hi.
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[03:31:09] <Deejay> moin
[03:32:52] <Loetmichel> RyanS: i did. (chinese xmas decoration for a big german mall, falling apart after 5 years of use) But the pic was to notice the near ass-long hair i had back then
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[05:22:14] <IchGucksLive> hi all
[05:23:05] <IchGucksLive> prity warm outside
[05:23:30] <IchGucksLive> full sun alday long
[05:23:51] <IchGucksLive> harvesting beer brewing weet
[05:25:26] <IchGucksLive> laminae, why dident you go for a complete set
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[05:28:01] <RyanS> can't find DM856 in Australia but they have the new EM542S http://oceancontrols.com.au
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[05:31:42] <IchGucksLive> RyanS, not needed
[05:31:56] <IchGucksLive> what about the dm556
[05:32:10] <IchGucksLive> RyanS, for you the best joice
[05:33:28] <RyanS> DM556 is $160, EM542S $92 em556 $117
[05:35:06] <IchGucksLive> i see 53AU$ on DM 556
[05:35:32] <IchGucksLive> its only the T version as i prefer the D
[05:36:13] <IchGucksLive> RyanS, https://www.ebay.com.au
[05:36:29] <IchGucksLive> RyanS, as we taked about best choie for you to go
[05:37:33] <RyanS> i thought the DM556T was the fake one?
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[05:37:48] <IchGucksLive> yes it is
[05:38:00] <IchGucksLive> but it is better then the 542T
[05:38:20] <IchGucksLive> and cheeper thne the 860H
[05:38:47] <RyanS> I don't really need rs232 of the DM556 anyway
[05:39:16] <IchGucksLive> RyanS, best at 232rs is you see your real need
[05:39:32] <IchGucksLive> and can adjust the parameters like we do on a pid cicle
[05:39:53] <IchGucksLive> BUT as i said ALL Drivers will do it for you
[05:40:01] <IchGucksLive> even the tb6600
[05:40:16] <IchGucksLive> will ofcause retch your numbers
[05:41:35] <IchGucksLive> RyanS, this is my elektronics on a small plasma 500x500 http://heimwerkermarkt-tretter.de
[05:43:10] <IchGucksLive> RyanS, and ofcause nothing is lost you only change a Driver Standard OUT
[05:43:17] <IchGucksLive> and you are upgreaded
[05:45:50] <RyanS> other option is DM556 from daeman cnc would cost $140 including shipping and they sell chainflex by the meter. ( can only get 25m roll locally)
[05:45:53] <IchGucksLive> im off meal is ready
[05:46:00] <RyanS> ok
[05:46:32] <IchGucksLive> RyanS, dont mess up on the Drivers go cheep it will retch your need
[05:46:50] <IchGucksLive> take the DM860T if you want more Flex
[05:47:03] <RyanS> fair enough
[05:47:23] <IchGucksLive> i know the decicion is hard
[05:47:34] <IchGucksLive> but you got a local dealer
[05:47:36] <IchGucksLive> use it
[05:47:51] <IchGucksLive> all within 5days shipment
[05:48:01] <IchGucksLive> its cheep and it will work
[05:48:04] <RyanS> yeah save some money
[05:48:35] <IchGucksLive> BYE
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[06:59:52] <jthornton> morning
[07:01:00] <miss0r> mornin
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[07:45:54] <Loetmichel> maaan, i sure have way to much power today... how did i manage THAT? -> http://www.cyrom.org
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[08:03:58] <holzjunkie_shop> hy @all
[08:11:33] <holzjunkie_shop> michel are you here ???
[08:15:49] <Loetmichel> yes
[08:15:58] <Loetmichel> [13:45] <Loetmichel> maaan, i sure have way to much power today... how did i manage THAT? -> http://www.cyrom.org
[08:15:58] <Loetmichel> [14:03] * holzjunkie_shop (~Thunderbi@dyndsl-037-138-049-113.ewe-ip-backbone.de) has joined #linuxcnc
[08:16:03] <Loetmichel> as you can see here ;)
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[08:29:23] <gloops> just cut a bit of ash log up i cut 18 months - the wood is as hard as metal
[08:29:40] <gloops> cut down 18 months ago
[08:32:20] <Loetmichel> try oak timbers that sat for 4 centurys in a timberframe house in germany, where the squares between the timbers are filled with a mix of straw and clay... thats like its fossilized and pure stone... i dulled carbide tools on that
[08:34:04] <gloops> well, i was only trying it to see if it was dry enough, bandsaw blade didnt like it at all, very slow going, little slices about 10mm thick - cant bend them by hand
[08:37:08] <miss0r> oak is some good stuff
[08:37:33] <miss0r> I have 4 nice'n thick planks sitting in my shed, waiting for me to get my act together and make a new dining room table with it
[08:38:09] <miss0r> I think they are 250x55x2300
[08:38:23] <gloops> £20 a metre here
[08:38:28] <gloops> more maybe
[08:38:44] <miss0r> Yeah, I live close to a sawmill, and I repair their equipment on a regular basis.
[08:38:59] <miss0r> Needless to say, I get some good prices
[08:39:21] <miss0r> You know why oak is so expensive?
[08:39:36] <miss0r> good oak planks, that is
[08:39:54] <gloops> ash is well known for being strong, use for tool handles and so on - would have to travel a bit to find it to buy
[08:40:05] <gloops> miss0r why is that?
[08:40:38] <miss0r> Its because of the recesses in the wood, that basically makes or breaks a good plank. Theres alot of that in oak, and to get 'good quality' planks they sort those with holes out. so theres alot of waste involved
[08:41:05] <RyanS> omg Australia has a lapp cable store that's reasonably priced and sells by the meter.. miracle
[08:41:34] <miss0r> RyanS: what?! reasonably prices lapp cable store? Oxymoron of the day
[08:41:41] <gloops> there arent many places near me that stock oak - at a reasonable price anyway, the ones that do stock mostly french oak
[08:42:58] <miss0r> gloops: Well, back in the day, alot of danish kinds ordered Oak woods to be planted, so they could make more war ships, resulting in an abondance(spell) of oak wood. funny thing about oak, they grow so slowly that most of what was planted for the warship industry never made it into ships
[08:43:39] <RyanS> 7$ a meter when you only need 6m of dragchain cable is ok
[08:44:23] <miss0r> wtf is dragchain cable?
[08:44:48] <RyanS> but just the standard CY cable might be ok
[08:45:47] <miss0r> Yeah. That is one of the advantages of dragchains. Unless you are talking about a dragchain that has a radius smaller than the recommended dynamic bend radius of the cable & it does so at a high frequenzy, regular CY will do plenty good
[08:46:28] <RyanS> designed for the plastic cnc cable chain conduit (trunking)
[08:47:02] <miss0r> as long as you don't get PUR cables for use in dragchains
[08:47:02] <RyanS> I guess it's for servo applications
[08:47:25] <miss0r> PUR cables are a bitch to work with, and no reason to use it inside dragchains.
[08:47:37] <miss0r> but they are indeed very flexible
[08:48:02] <miss0r> bleh. back to gardening.
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[08:53:02] <Loetmichel> miss0r: dragchain cable is cable thats specced for millions of movements over its lifetime
[08:54:22] <Loetmichel> movements= bending cycles over its whole length
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[09:32:38] <gloops> @SkyNews
[09:32:38] <gloops> The UK is set to bask in sun for a further four weeks ☀️🕶️
[09:32:43] <gloops> noooo!
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[10:15:00] <IchGucksLive> hi all
[10:15:05] <IchGucksLive> 32deg outside
[10:15:16] <IchGucksLive> im done for today
[10:15:32] <IchGucksLive> Loetmichel, 1A braugerste geerntet
[10:16:14] <IchGucksLive> miss0r, use oelflex 110
[10:16:46] <IchGucksLive> RyanS, oelflex 110 4x0,75mm²
[10:17:17] <IchGucksLive> RyanS, no soldering no plugs
[10:22:16] <IchGucksLive> im off till later
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[10:26:44] <gloops> Ichs - the heat is here for another 4 weeks
[10:32:24] <jdh> isn't that what summer is all about?
[10:32:42] <jdh> 37C and 97% humidity
[10:35:55] <gloops> not here
[10:37:09] <gloops> they dont work in this heat in spain, everybody goes to bed in the afternoon, they only work mornings and nights
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[11:30:04] <Deejay> re
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[11:32:05] <hazzy-lab> wb
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[11:53:31] <gloops> wow, they found those boys alive in thailand cave
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[12:01:04] <fragalot> Hey
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[12:32:51] <IchGucksLive> hi all
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[12:43:13] <IchGucksLive> today quiet here
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[13:00:53] <IchGucksLive> hi CubicleNate
[13:01:02] <IchGucksLive> here are the cnc freeks
[13:01:03] <CubicleNate> Greetings
[13:01:24] <CubicleNate> I haven't had the privilege of working with a CNC in many, many years
[13:01:46] <IchGucksLive> i got more then one every day
[13:02:25] <IchGucksLive> CubicleNate, on coordinates the "world runs"
[13:02:46] <IchGucksLive> and not only the world
[13:03:09] <IchGucksLive> CubicleNate, were are you from continant
[13:03:32] <CubicleNate> USA, Michigan,
[13:03:41] <CubicleNate> My family migrated from Germany in the 40s and 50s
[13:03:47] <IchGucksLive> lots of peolple heree are at your place
[13:04:04] <IchGucksLive> CubicleNate, 80% did do that
[13:04:12] <IchGucksLive> 80% of the USA
[13:04:24] <IchGucksLive> EVEN Trump is from germany
[13:04:45] <IchGucksLive> and the Rest of its family from RUS
[13:05:16] <IchGucksLive> CubicleNate, still on
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[13:07:09] <CubicleNate> Many of my older relatives have passed as of recent so most of us left were born here.
[13:07:19] <CubicleNate> I named my son, Fritz, after my father. :)
[13:07:43] <IchGucksLive> CubicleNate, this channel is logd for refew of the written yust type log
[13:08:02] <IchGucksLive> CubicleNate, the bot will direct you to the last day
[13:12:48] <IchGucksLive> im off for today its late in germany Gn8 till tomorrow
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[13:17:12] <CubicleNate> Have a good night. I will have more questions for you tomorrow
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[13:40:46] <fragalot> Hey
[13:43:36] <gloops> belgium v japan soon
[13:44:23] <Tom_L> gloops, how long were they in the cave
[13:44:49] <gloops> 10 days i think Tom_L - apparently all are alive
[13:45:35] <fragalot> gloops: that'd explain all the belgian flag colored tents outside, lol
[13:48:10] <gloops> should beat japan
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[14:26:17] <CaptHindsight> http://www.ecmweb.com
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[14:57:27] <CaptHindsight> https://youtu.be who makes this threading adapter for your benchtop? :)
[14:58:24] <gregcnc> benchtop thread roll?
[14:59:07] <CaptHindsight> yeah, I'm tired of having to wait several minutes to make one by hand
[15:05:35] <gloops> oh dear..Japan have scored
[15:06:10] <CaptHindsight> a year of upsets
[15:06:56] <gloops> yes it is turning out like that
[15:08:59] <gloops> 'British cave diver reaches boys trapped in Thailand cave'
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[15:09:16] <gloops> cave diving is something that never really appealed to me..
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[15:09:49] <gloops> oh dear Japan 2...
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[15:13:03] <Tom_L> you spoke too soon
[15:16:03] <CaptHindsight> cave or soccer?
[15:16:14] <Tom_L> socker
[15:16:39] <gloops> japan are getting better at sport all the time, very disciplined team
[15:17:34] <CaptHindsight> getting taller overall as well
[15:18:02] <gloops> yes theyve grown 14 inches
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[15:22:53] <CaptHindsight> I bet after investigating they will find Russian involvement behind all the game upsets
[15:23:15] <CaptHindsight> will probably destabilize FIFA
[15:24:20] <jdh> I love cave diving
[15:24:31] <XXCoder> talking about russia, British is finding out they had election inference from russia
[15:24:41] <Tom_L> jdh, how do you keep track of where you're at
[15:25:09] <jdh> line with directional markers
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[15:26:03] <Tom_L> do they mark distance also for time or do you rely on your watch
[15:26:38] <jdh> percent of gas mainly
[15:27:42] <jdh> but, there are sometimes distance markers
[15:27:51] <CaptHindsight> Russia's main export is destabilization
[15:28:05] <jdh> us too.
[15:28:27] <CaptHindsight> yeah, but you can't say that
[15:30:17] <Tom_L> JT-Shop, it's about time to dust off the cannon...
[15:31:02] <gloops> german govmt seems to have collapsed today
[15:31:18] <XXCoder> huh
[15:31:35] <gloops> btw Belgium are back 2-2
[15:31:52] <Tom_L> gotta save face
[15:33:02] <gloops> XXCoder Merkels coalition partner appears to have resigned
[15:35:58] <XXCoder> hmm ok
[15:37:21] <miss0r> Goodevening
[15:38:03] <miss0r> anyone up to anything interresting?
[15:39:39] <CaptHindsight> still a good chance for either team to win
[15:41:22] <CaptHindsight> miss0r: define interesting
[15:41:39] <miss0r> I'm thinking some cool project os sorts
[15:41:49] <gloops> too hot to do anything
[15:42:04] <CaptHindsight> down to the low 80's today
[15:43:26] <CaptHindsight> last 5 minutes of the game then off
[15:43:36] <miss0r> damn. Everything is overheating around here :D We're a few guys going camping in sweden in two weeks. It seems we are not going to able to light a camp fire at any time...
[15:44:54] <gloops> yeah getting pretty bad for fires
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[15:51:59] <gloops> belgium - dying seconds
[15:52:18] <gloops> cruel!
[15:54:01] <XXCoder> was fire disallowed miss0r ? or just too hot to?
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[15:54:58] <miss0r> XXCoder: I'm having a hard time finding out. Looking at the swedish weather service website, all of sweden is now or will soon be forest fire class 5E, which is the highest level of risk.
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[15:55:39] <miss0r> Where I live, in Denmark, we are not allowed to light a fire on public spaces at the moment. But i think the swedish law does not allow for such a prohibitation. But I can't figure out where to read about that in detail
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[15:55:53] <XXCoder> I was thinking if its not regulations related you could do small cone of sticks burning to roast marashmallows and such
[15:56:15] <XXCoder> only little heat
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[15:57:01] <miss0r> I'm not worried about generating heat to an extend, where it would be uncomfortable for us to be around. The thing is, our menu is quite reliant on weather we can have a fire or not :)
[15:57:11] <miss0r> if not, we are going to have some sad sad food for the duration of the trip
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[15:57:17] <SpeedEvil> miss0r: flameless ration heaters exist.
[15:57:19] <SpeedEvil> And similar.
[15:57:30] <miss0r> sure
[15:57:40] <SpeedEvil> Also - 'open fire' or not. Enclosed gas stoves, for example.
[15:58:02] <miss0r> its just convinient to light a bonfire, to cook for 8 people
[15:58:07] <gloops> make one of those gas bottle stoves
[15:58:26] <miss0r> SpeedEvil: Theres some debate weather enclosed gass stoves qualifies or not
[15:58:32] <XXCoder> is cooking candles allowed in fire risk areas I guess it counts as fire
[15:58:35] <gloops> but yeah, not quite the same for camping
[15:58:46] <miss0r> I have two, actualy. But cooking for 8 takes its sweet time on a small gas stove
[15:59:31] <miss0r> Around here, you need to look over your shoulder twice before using an 'open flame' to light a cigarette
[16:00:00] <miss0r> Apparently this is the dryest juni in record 'round here
[16:00:04] <miss0r> june*
[16:00:41] <miss0r> since that stuff started being measured in 1874
[16:01:54] <Rab> miss0r, IIRC you mentioned a preference against PUR cable in e-chain. Can you expand on that?
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[16:02:14] <miss0r> Rab: Sure; its overkill
[16:03:02] <Rab> miss0r, but let's say I had some floating around. There's not a mechanical reason against it?
[16:03:26] <XXCoder> miss0r: can always make solar oven lol
[16:03:51] <miss0r> Rab: not at all. PUR is excellent for alot of things. It is just not funny to work with.
[16:04:13] <Rab> miss0r, I see.
[16:04:44] <miss0r> XXCoder: We were planning to bring a small pig in frozen condition, so that on the second day on our trip, we could build a fire, and roast it most of the day. That plan is going down the drain
[16:05:58] <Rab> miss0r, fresnel lens sous vide?
[16:06:04] <gregcnc> just put it out in the sun?
[16:06:31] <miss0r> Rab: PUR is ment for environments where high dynamic values are needed. But the cable chain, if the right one is choosen, does not exceed the dynamic radius limitations on the cables used.
[16:06:44] <gregcnc> ahem, "that plan is going up in smoke"
[16:06:52] <miss0r> hehe. all valid ideas. But for the time being I am just a big bummed out by it.
[16:07:09] <miss0r> gregcnc: lets hope not :P
[16:07:18] <gregcnc> what's left then a lot of wihiskey?
[16:07:34] <miss0r> beans, bacon(raw) & whiskey
[16:07:40] <Rab> miss0r, I deal with PUR cable for high-vibration environments, so I have a stock of harness pulls which are in pretty good shape that I was planning to use.
[16:08:26] <miss0r> Rab: I see nothing wrong with that. Earlier I was just stating, that there would be no reason to go out and spend money on the premium PUR cable, if one was planning to use a cable chain
[16:08:51] <Rab> FWIW I've had good results stripping PUR insulation with cheap rotating coax strippers, although they have to be dialed in exactly.
[16:09:01] <miss0r> Unless, of course, as you say: a high vibration environment. But that would rule out the cable chain as well :)
[16:09:04] <Rab> miss0r, makes sense.
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[16:09:52] <miss0r> yeah, it is absolutly doable :] but given the choice, wouldn't you rather spend less money and strip insulation off some CY instead?
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[16:10:37] <miss0r> I'll call it a night. See you around
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[16:11:17] <miss0r> Rab: Just one thing before I leave, what does FWIW stand for?
[16:11:39] -!- DaPeace has quit [Client Quit]
[16:12:03] <miss0r> googled it: 'For What It's Worth'. Got it.
[16:12:05] <miss0r> Goodnight
[16:12:07] <Rab> ^^
[16:12:08] * miss0r is off
[16:19:13] <XXCoder> the rockers. ;)
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[17:16:39] <Deejay> gn8
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[18:11:11] <gloops> all quiet on the western front
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[18:25:27] <lcvette_> log
[18:25:28] <c-log> lcvette_: Today's Log http://tom-itx.no-ip.biz:81
[18:27:11] <lcvette_> Tom_L: is this the right ts555 timer? TS555CDT
[18:27:39] <lcvette_> https://www.digikey.com
[18:27:51] <flyback> * the national weather service has issues a "you go to hell! ..........................you go to hell and you die!!!!!"..............for your area
[18:28:33] <lcvette_> that is a bit hostile
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[18:33:35] <gloops> youll be ok if you wear a hat flyback
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[19:38:30] <lcvette_> Tom_L, Fragalot, Jesseg, how is this version? https://easyeda.com
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[19:43:18] <lcvette_> https://imgur.com
[19:43:28] <lcvette_> image link in case the easyeda link doesn
[19:43:33] <lcvette_> t work
[19:43:57] <renesis> unf
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[19:44:11] <renesis> flow goes left to right, up to down!
[19:44:44] <renesis> thats a pfet?
[19:47:14] <renesis> if pin 1 is LED power, i think Q1 is supposed to be a pfet, datasheet and symbol looks like nfet
[19:51:25] <renesis> also you should put more ground symbols, it will look more sex
[19:52:47] <lcvette_> i had more ground symbols
[19:53:45] <lcvette_> https://i.imgur.com
[19:54:26] <jesseg> Lcvette, I'm taking off here but is that a P-Channel fet or an N-Channel fet?
[19:55:21] <lcvette_> was the number you gave me
[19:55:46] <lcvette_> wrong one?
[19:56:02] <jesseg> oh that's an N-Channel
[19:56:17] <renesis> needs to be low side then
[19:56:22] <renesis> well
[19:56:33] <jesseg> You want an N-Channel but you want to connect it differently
[19:56:49] <renesis> between the 39R resistors and ground
[19:56:50] <lcvette_> flip it?
[19:56:54] <renesis> nono
[19:56:58] <renesis> well
[19:57:01] <renesis> yes also
[19:57:01] <lcvette_> ah ok
[19:57:02] <jesseg> Lcvette, here's how to use the mosfet: https://i.stack.imgur.com
[19:57:18] <renesis> S needs to be ground on a Nfet
[19:57:36] <renesis> but thats right way for a pfet, which you can use, but dont need to usually
[19:57:50] <jesseg> assuming the 555 pulls all the way to VDD :P
[19:57:57] <lcvette_> do i need to move the whole ts555 time to the ground side?
[19:57:58] <renesis> pfets are good for switching power supplies when you absolutely want the circuit to stay grounded
[19:58:07] <jesseg> anyway sorry gotta go
[19:58:16] <lcvette_> ok
[19:58:16] <renesis> i hate 555s
[19:58:42] <lcvette_> trying to kep it simple
[19:58:52] <lcvette_> i don't know how to program
[19:58:55] <renesis> on your circuit, the leds and resistors dont care if they float at high voltage when no current is flowing
[19:59:01] <lcvette_> im an oldie
[19:59:13] <renesis> but you will need a logic fet if the 555 is to run off the battery and its only like 4V
[19:59:26] <renesis> heheh, yeah to me its almost opposite
[19:59:52] <renesis> easy to throw an integer into a timer on a uC with internal RC oscillator
[20:00:22] <renesis> try to keep my analog hax to audio circuits
[20:01:02] <renesis> normal fets need like maybe 7 to 10 V to turn on completely
[20:01:20] <renesis> you can get logic fets will work fine with like 3v
[20:01:52] <lcvette_> https://imgur.com
[20:01:54] <renesis> last thing you have to worry about is the charge time
[20:02:01] <lcvette_> 3.7v batter
[20:02:24] <renesis> they charge up to 4.2v, but yeah you will need a logic fet
[20:02:37] <renesis> you need to flip the fet
[20:02:42] <lcvette_> so i have wrong fet?
[20:02:45] <renesis> so the source is ground
[20:02:50] <renesis> maybe sec
[20:03:22] <renesis> https://www.infineon.com
[20:03:53] <renesis> page 5, figure 10A, you want it to look like that
[20:04:12] <lcvette_> https://imgur.com
[20:04:32] <renesis> its electron flow, not standard flow, so 'Source' is ground, and it 'Drains' to the supply side
[20:04:48] <lcvette_> like so
[20:04:55] <renesis> the little arrow part points in on an Nfet and connects to the source
[20:05:13] <renesis> yes
[20:05:23] <renesis> what color LEDs are those?
[20:05:24] <lcvette_> nice
[20:05:33] <lcvette_> so you would do it without the ts555 huh?
[20:05:38] <lcvette_> IR
[20:05:46] <lcvette_> im trying to build a wireless probe
[20:06:04] <renesis> ooh, what is on pin1? just need more voltage but that should work
[20:06:24] <renesis> 555 is prob fine, i just dont use them
[20:06:41] <lcvette_> just trying to get it to make a certain frequency
[20:06:44] <renesis> sec, i am still looking for switching voltage
[20:06:51] <lcvette_> k
[20:07:06] <renesis> right, you might have to tweak resistance to get it close if you need accuracy, but they work
[20:07:53] <lcvette_> yeah thats what i was reading
[20:08:30] <lcvette_> i *think* the resistors i have should be the correct frequency i need
[20:08:35] <lcvette_> but will have to test
[20:08:41] <renesis> looks like it might be a logic fet, page 6 there is a Rds(on) versus gate voltage plot
[20:09:36] <renesis> pretty low R by 4V, not lowest but def on, like 0.025 ohms max
[20:10:17] <renesis> yeah page 3, fig 3, totally a logic fet, you should be good
[20:10:34] <lcvette_> sweet
[20:10:49] <lcvette_> not sure about pin 1
[20:10:55] <renesis> they only plot Vgs (voltage from gate to source) to 3.0V
[20:10:56] <lcvette_> just found it in a diagram online
[20:11:24] <renesis> well, you can look up a texas instruments application note, probably
[20:13:02] <renesis> http://www.ti.com
[20:13:40] <renesis> http://www.ti.com
[20:14:14] <renesis> check your circuit versus the ones in there, read descriptions for timing info
[20:14:22] <lcvette_> ok
[20:15:26] <renesis> the only thing you might have a problem with, is if you are trying to switch the led very fast, the FET might not fully turn on fast enough, because it has gate capacitance that needs to charge up
[20:15:45] <renesis> if youre going for like, a slow visible blink, totally not a problem
[20:16:57] <lcvette_> hmmm
[20:17:00] <renesis> if youre trying to switch at like, 40 kHz, and the 555 circuit has a lot of resistance between the output and the fet input, maybe a problem
[20:17:15] <lcvette_> the frequency for ir is faster than that i think
[20:17:25] <renesis> because the resistance controlls how fast the gate capacitance charge and discharges
[20:17:40] <renesis> its fast but its not crazy fast
[20:17:58] <renesis> but right i think it might be above audio
[20:18:08] <lcvette_> i think 34khz
[20:18:40] <renesis> if its directly connected to the amplifier output, inside the 555, performance should be pretty good, but id have to look up 555 internals
[20:18:45] <renesis> yeah that sounds right
[20:19:35] <lcvette_> fet can't pulse that fast?
[20:19:48] <renesis> looks like output is an inverter gate on a 555, so should be low impedance push-pull, so should be pretty good performance.
[20:20:07] <renesis> it can but the drive has to be able to push current into and suck out the gate capacitance
[20:20:27] <renesis> the fastest stuff has low gate capacitance, and low impedance driver circuits
[20:20:35] <lcvette_> gotcha
[20:21:08] <lcvette_> TS555CDT
[20:21:19] <lcvette_> thats the one i was instructed to use for the 3.7v battery
[20:22:12] <renesis> yeah i think therye diff voltage specs and temp ratings, all pretty much same tho
[20:22:29] <lcvette_> ok
[20:22:51] <lcvette_> actually not certain about the cdt part but the ts555 part was what i was told
[20:23:04] <lcvette_> this is just what popped up in easyeda when i searched the library
[20:23:06] <lcvette_> lol
[20:23:18] <renesis> CDT is going to be the chip package, and how those are shipped, usually
[20:23:32] <andypugh> Anachronisms. 3D printed parts, 1936 lathe, 1962 tankard: https://photos.app.goo.gl
[20:23:35] <renesis> like, SOIC8 in tape on a reel, or some shit
[20:23:49] <lcvette_> gotcha
[20:24:00] <renesis> andypugh: fixture is printed?
[20:24:07] <lcvette_> so i should put all the individual ground symbols back on
[20:24:09] <renesis> thats a decent application for prints
[20:24:09] <andypugh> Yes
[20:24:43] <renesis> lcvette_: its a personal thing, ill do it either way depending on circuit
[20:25:00] <renesis> like, i think for yours, one ground for each subcircuit would be easier to read
[20:25:21] <renesis> like one for the batt manager stuff, one for the 555 stuff, one for the nfet and IR LEDs
[20:25:24] <andypugh> The oldest tankard I have here for a new glass bottom is 1922. I will work bak in time.
[20:26:05] <renesis> andypugh: youre just doing some finish work to attach to a base?
[20:26:23] <andypugh> The lathe-geeks probably know what the lathe is at first glance.
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[20:27:03] <renesis> that shit looks like it happened before engineers had a sense of limited resource and before assembly lines
[20:27:41] <andypugh> renesis: No. They have a glass bottom. They are used in a student bar. Accidents happen. I need to machine out the soldered-in retaining ring, replace the glass and solder in a new ring
[20:28:09] <renesis> what kind of solder?
[20:28:41] <andypugh> renesis: The lathe? Yes. it was made in 1936. They made the first one in 1921. Mine is serial number 175. They were profitable.
[20:28:43] <renesis> is the glass bottom visible when in use? if not i would be annoyed
[20:28:58] <Rab> andypugh, the 3D printed part is the red mandrel holding the tankard?
[20:29:04] <andypugh> Aye
[20:29:30] <andypugh> renesis: high-bismuth to avoid melting anything elsw
[20:29:51] <renesis> neat
[20:31:04] <andypugh> renesis: Yes. it’s traditional. https://en.wikipedia.org
[20:32:21] <renesis> 'another legend has it that the glass bottom was implemented so as to see the attack coming.'
[20:32:24] <renesis> haha
[20:34:45] <andypugh> You can see some of the 300+ tankards in the backround here, and one of the college alumni in the foreground. https://goo.gl
[20:35:09] <lcvette_> https://imgur.com
[20:35:34] <renesis> andypugh: theyre engraved with grad class names?
[20:36:26] <andypugh> No, they are engraved with the names and dates of Union officers and club chairmen / captains
[20:36:46] <renesis> lcvette_: i would put the ground symbol by the 555 by C1 so it is on the bottom of that net, but yeah looks good!
[20:37:03] <renesis> aah, just the brass. still very cool
[20:37:24] <renesis> er, C5
[20:37:51] <renesis> the 0.01 uF cap
[20:38:23] <andypugh> I have 5 I can use. (well, except one is one of my repairs, but that has a split in it. By the state of it you can read a lot in to the nature of RCS Publicity Officer.
[20:39:50] <renesis> heh
[20:40:01] <andypugh> There is, of course, a protocol. If you enter the bar and find someone below you on the tankard drinking from it, they are obliged to finish the tankard as fast as they can, and buy you a drink in it.
[20:40:43] <renesis> points for patience and awareness
[20:41:18] <lcvette_> https://imgur.com
[20:41:34] <renesis> very nice
[20:41:43] <andypugh> Well, you tend to know your successors. Or you ask the barman for “your” pot and find it is out already.
[20:41:56] <lcvette_> sweet
[20:42:38] <lcvette_> jesseg mentioned the following: use a ceramic bypass cap
[20:42:53] <lcvette_> but im not sure what he was meaning
[20:43:31] <lcvette_> when i looked at my notes i didn't have any more info than that
[20:43:40] <renesis> its usually a good idea if the capacitance is small enough that disc ceramic or muli layer ceramic chip (MLCC) caps work, to use them
[20:43:51] <renesis> because electrolytics have various problems
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[20:44:28] <renesis> from stolen electrolytic formulas not working out and fucking the entire industry, to just being more sensitive to heat, and have complete shit tolerances
[20:45:50] <renesis> MLCC has pretty much replaced tantalum caps, but depending on voltage, above like 1uF to 10uF, and ceramic caps are usually spendy or dont exist
[20:45:54] <andypugh> I just worked out how to work this web page. https://www.imperialcollegeunion.org if ou click the boxes under the photo, the middle box shows a special event, and almost exactly in the middle of the photo, dressed in black and holding a tankard is me. You will note that most of the people there are, like me, too old tobe students any more.
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[20:47:40] <lcvette_> "And keep bypass caps right close to integrated circuits. Oh, and use a ceramic bypass cap between power and ground pins on the integrated circuits per their datasheet. A 100uF electrolytic capacitor has too much inductance."
[20:47:55] <renesis> yes always
[20:48:09] <lcvette_> so im guessing C3 is a bad choice?
[20:48:24] <renesis> use the 100uF cap, but also put a 0.1uF as close the the power and ground pins as possible
[20:48:53] <renesis> like
[20:49:18] <renesis> two to three orders of magnitude between decoupling caps in a group is good rule of thumb
[20:49:30] <andypugh> Anyway, sleep time
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[20:49:37] <renesis> night!
[20:50:06] <renesis> damn that was a cool pic he put
[20:50:18] <lcvette_> night andy!
[20:50:43] <lcvette_> i will have to check it in a bit
[20:50:52] <lcvette_> im engrossed inn this project
[20:50:56] <lcvette_> lol
[20:51:01] <lcvette_> eyes are crossed
[20:51:15] <renesis> lcvette_: so 100uF 6.3V electrolytic, 1 uF ceramic, 0.01 uF ceramic is a good decoupling group
[20:51:54] <lcvette_> is that what i have?
[20:52:15] <lcvette_> C3, C4, C5
[20:52:27] <lcvette_> oh i have nF
[20:52:35] <lcvette_> 1nF
[20:52:36] <renesis> C3
[20:52:41] <renesis> is decoupling
[20:52:50] <renesis> from VCC to ground
[20:53:21] <renesis> everything else im pretty sure is for the timing circuit, delayed feedback stuff
[20:54:21] <renesis> so you can do like, in parallel: 100uF electrolytic, 1uF ceramic, 0.01 ceramic
[20:54:44] <lcvette_> pins 1 and 8?
[20:54:47] <lcvette_> on the timer
[20:54:51] <lcvette_> or the battery
[20:54:55] <renesis> or: 100uF electrolytic, 0.1uF ceramic
[20:55:04] <renesis> both, really
[20:55:31] <renesis> 100uF is like a mini local power supply
[20:55:40] <lcvette_> gtocha
[20:55:55] <lcvette_> and those will be regula caps not decoupling
[20:56:07] <lcvette_> just power storage
[20:56:14] <renesis> and the little guys handle transient spikes, like when it tries to switch and if some interference ends up on the supply lines
[20:56:27] <lcvette_> gotcha
[20:56:35] <lcvette_> like a little regulator
[20:56:42] <lcvette_> smoother
[20:56:45] <renesis> a little, yeah
[20:58:08] <renesis> like, electrolytics are almost human speed, theyre faster than audio but not a ton, they just dont see hard edges
[20:59:55] <renesis> like, 34 kHz doesnt seem fast, but its not a sine wave, so the edges are like a quarter wave in the MHz spectrum
[21:03:39] <lcvette_> https://imgur.com
[21:03:45] <lcvette_> ok, sorry was updating
[21:04:45] <lcvette_> added a 0.1uF to battery and timer power pins
[21:04:57] <lcvette_> so i should also add a 100uF there as well?
[21:05:20] <renesis> on usb power its prob good
[21:06:11] <renesis> also maybe one from the top of the LEDs to GND
[21:06:16] <lcvette_> pin 1 and 5 by micro usb plug
[21:07:03] <renesis> wait no
[21:07:32] <lcvette_> k
[21:07:45] <renesis> C8 next to C3, in parallel, that makes them like one cap, like 100.1 uF
[21:08:06] <renesis> GND on the 555 has to connect to ground
[21:08:45] <renesis> https://imgur.com
[21:09:47] <renesis> on this schematic, you can put three 0.1 uF next to C1, C2, C3, in parallel with ends connected
[21:10:40] <renesis> because putting a cap is kind of like disconnecting things, except at high frequencies
[21:10:50] <lcvette_> ok
[21:10:51] <lcvette_> one sec
[21:10:55] <renesis> at DC, cap is open, and inductor is like a short
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[21:11:18] <lcvette_> so for the battery, C7 does that need to go as well?
[21:11:43] <renesis> that would disconnect the battery, the caps in series like that
[21:11:57] <renesis> except for the moment you connect it, and again when you disconnect it
[21:12:14] <lcvette_> https://imgur.com
[21:12:32] <renesis> no you put them in series!
[21:12:47] <renesis> parallel is like, connected to the same stuff, not end to end, but side by side
[21:13:19] <lcvette_> ok i though that but when you said ends connected i got confused
[21:13:37] <renesis> oh, like, connect ends on same side of parts together
[21:13:47] <renesis> yeah thats not so good a way to explain i guess, sorry, heh
[21:14:47] <renesis> like, in parallel with C1 means new part is also connected across connector, from pin 1 to 5, same connection
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[21:17:10] <lcvette_> https://imgur.com
[21:18:21] <renesis> C3, C10, C8 are perfect, i would bump one up to 1uF and one down to 0.01uF, or just use 0.1uF (these are most common and cheapest by far)
[21:19:03] <renesis> oh
[21:19:18] <renesis> C9, remove that, and C6, and C7, reconnect like before
[21:19:31] <renesis> https://imgur.com
[21:19:33] <renesis> like here
[21:20:15] <renesis> and then put 0.1uF in parallel with 10u, and thats probably good
[21:20:44] <renesis> but you can change to 100uF, 1uF, 0.01uF if you want
[21:21:33] <renesis> then, i would do the same decoupling from pin 2 of the FET, the grounded side, to pin 1 of probe connector
[21:21:52] <renesis> this maybe make the IR LEDs turn on a tiny bit faster
[21:22:10] <renesis> depends on their supply and how long the wires to it
[21:22:47] <lcvette_> https://imgur.com
[21:22:53] <lcvette_> ok trying to keep up
[21:22:57] <lcvette_> lol
[21:23:11] <renesis> yes
[21:23:20] <renesis> very good
[21:23:29] <lcvette_> ok so add same parallel setup to battery?
[21:23:58] <lcvette_> or just to fet
[21:24:04] <renesis> C1 and C2 have same problem as C3, they are kind of slow, but, since you have 100uF on the 555, maybe fine
[21:24:07] <lcvette_> between ground and fet
[21:24:12] <renesis> i would do the fets
[21:24:17] <renesis> remember you dont have to use them
[21:24:34] <renesis> like, you can just not stuff those parts in the PCB
[21:25:02] <renesis> but if you dont put them in the schematic, you have to rework them onto the PCBA if you decide you need them later
[21:25:10] <lcvette_> if it makes it better and more reliable i want it to be that way
[21:25:24] <renesis> PCB, is like, the circuit board, PCBA is the assembly with all the parts soldered to it
[21:25:52] <renesis> it makes the board more versatile, and yeah general local decoupling is always helpful
[21:26:04] <renesis> *generally
[21:26:51] <renesis> theres weird analol dinosaur circuit exceptions where a good power supply causes things to flip out, but almost always okay
[21:29:45] <renesis> anyway, i have to go soon, but looks like you got it
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[21:32:01] <lcvette_> Thanks Renesis!!
[21:32:08] <lcvette_> I really appeciate all the help!
[21:32:17] <lcvette_> I will post it up later when im done with it!
[21:32:42] <renesis> no! this was fun! summer work is in a warehouse, mostly is boring
[21:32:51] <renesis> today i got to multiply and divide
[21:48:32] <tjb1> https://media.discordapp.net
[21:48:47] <tjb1> I screwed pinout on one up because they had the plug flipped on the schematic :(
[21:50:27] <tjb1> new https://i.imgur.com
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