#linuxcnc | Logs for 2020-07-16
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[02:12:18] <Loetmichel> mornin#
[02:12:18] <Loetmichel> *harhar* You know you do that WAY to often when you stop at the fuel station on your morning commute and on the cashiers desk is already a frash brewed latte macciato and your favorite smokes waiting for you... THATS service :-)
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[03:55:22] <Loetmichel> hehe, i am sitting here on my desk in the shop floor... our "delivery organizing" gal came down to discuss something with the measurement engineer... MAN those two are like a 40 years married couple... the amount of bitching and banter is over 9000... have. to. remain. silent. and. not. laugh. out. loud.
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[06:20:21] <Tom_L> morning
[06:20:50] <XXCoder> lol loet
[06:37:29] <JT-Cave> morning
[06:41:38] <XXCoder> hey
[06:43:33] <XXCoder> jt the office area is still closed but shop running now
[06:43:35] <JT-Cave> was testing part of the spoke lathe conversion yesterday and the cylinder coupling I used pulled in two
[06:43:36] <XXCoder> wasnt great day
[06:43:45] <XXCoder> doh
[06:44:02] <JT-Cave> I guess it was not rated for tension
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[07:42:09] <JT-Cave> what is a push in a forum
[07:46:20] <XXCoder> only one I can think of is push notification, one where they send info to you rather than "pull" where your browser contacts site
[07:46:34] <XXCoder> not sure if it applies at all lol
[07:49:23] <JT-Cave> hmm ifconfig is depreciated now
[07:50:11] <SpeedEvil> Nooooooooooooooooooooooooooooooooo
[07:50:27] <XXCoder> whats next, grep?
[07:55:45] <Loetmichel> hehe, just finished my second successful SLA print... noticed that the sun isnt shining... no UV curing light... fuuuuuu... then the coworker asked if i still have my PCB exposer at the company... YES, I HAVE... solution! -> http://www.cyrom.org
[08:18:15] <Loetmichel> hehe, just finished my second successful SLA print... noticed that the sun isnt shining... no UV curing light... fuuuuuu... then the coworker asked if i still have my PCB exposer at the company... YES, I HAVE... solution! -> http://www.cyrom.org
[08:18:18] <Loetmichel> grr
[08:18:33] <Loetmichel> sorry for double
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[09:28:56] <perry_j1987> hows it going
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[09:41:05] <skunkworks> cooled off
[09:41:07] <skunkworks> but humid
[09:41:28] <skunkworks> can't see across the mississippi
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[12:07:25] <Tom_L> rain.
[12:22:13] <gregcnc> did anyone make small <6" super spacers (manual indexer)
[12:26:05] <Tom_L> how many degree res?
[12:29:34] <Tom_L> https://www.amazon.com
[12:31:25] <Tom_L> gregcnc, iirc someone here recently got an indexer
[12:31:46] <gregcnc> not a dividing head https://www.ebay.com
[12:32:21] <Tom_L> maybe what's the difference?
[12:32:29] <Tom_L> - maybe :)
[12:32:57] <gregcnc> the plates define positions
[12:33:15] <Tom_L> so similar just not as many divisions
[12:33:23] <gregcnc> unlock lever, rotate, release
[12:33:25] <Tom_L> i see the first plate has 2
[12:33:28] <Tom_L> yeah
[12:33:37] <Tom_L> no i've never used one of those
[12:33:53] <Tom_L> a used one might have worn plates
[12:33:55] <gregcnc> I wonder how garbage this is https://www.grizzly.com
[12:34:07] <gregcnc> and how you even mount it
[12:34:31] <Tom_L> long allthread with strap clamps?
[12:34:44] <Tom_L> dunno
[12:36:26] * JT-Cave notices that lunch minute is up
[12:36:39] <Tom_L> some of those plates on that Yuasas look worn
[12:36:51] <Tom_L> JT-Cave, what you been workin on lately?
[12:36:52] <gregcnc> oh well
[12:37:03] <Tom_L> wouldn't be that hard to make some
[12:38:14] <Tom_L> https://www.amazon.com
[12:38:53] <JT-Cave> that 1800's spoke lathe
[12:38:56] <JT-Cave> just got one part done
[12:39:22] <Tom_L> fix the cylinder attachment problem?
[12:39:36] <Tom_L> tension vs compression
[12:40:29] <Tom_L> gregcnc, do those have a release handle that locks back in when you turn it to the next position?
[12:40:46] <Tom_L> i can see that being desireable in a production environment
[12:41:19] <JT-Cave> yea got a better coupling
[12:42:22] <JT-Cave> gotta find a thin 13/16" wrench to tighten it up so off to mainards
[12:42:40] <Tom_L> i got one
[12:42:43] <Tom_L> i think
[12:42:58] <Tom_L> fits bicycle hubs
[12:43:08] <Tom_L> sounds about the right size anyway
[12:44:21] <Tom_L> better pick up a set of wentworth tools while you're there :)
[12:44:30] <jymmmm> LOL, been looking for a 13/16 spark plug socket, lowes has been out of stock for a month
[12:44:50] <Tom_L> ace
[12:44:53] <Tom_L> hdwe
[12:45:06] <jymmmm> Tom_L: ACe is twice the price
[12:45:11] <jymmmm> I already checked =)
[12:45:23] <Tom_L> craftsman though i think
[12:45:37] <jymmmm> Yeah, both lowes and Ace are craftsman
[12:45:39] <Tom_L> not chinaman
[12:45:45] <Tom_L> oh?
[12:46:02] <jymmmm> Yeah, lowes has the full craftsman line
[12:46:28] <Tom_L> are they still lifetime?
[12:46:32] <jymmmm> yep
[12:47:09] <jymmmm> Orchard carried craftsman, lowes bought orcahrd, lowes closed orchard, lowes lept the craftsman line
[12:47:47] <jymmmm> Lowes are assholes for closing Orchard Supply Hardware, LOVED that place
[12:48:35] <jymmmm> ORchard had been around for like 108 years
[12:50:53] <Tom_L> i generally don't go to lowes
[12:51:27] <jymmmm> ME neither, but I do for swapping craftman
[12:51:50] <Tom_L> you just take them to the service desk?
[12:52:40] <Tom_L> i've got a few i've cut and welded on... wonder if they'd take those
[12:52:56] <jymmmm> Well, I first go find the replacement to make sure t's in stock, then take it to the returns counter and they do the exchange.
[12:53:22] <jymmmm> Yes, the lifetime warranty is on a SATISFACTION warranty, not a performance/durability warranty
[12:54:15] <jymmmm> And if they no longer make an item, you will get your money back.
[12:55:04] <jymmmm> hand tools only
[12:56:32] <Tom_L> if they no longer make it, who sets the value?
[12:56:45] <jymmmm> Craftsman
[12:57:48] <jymmmm> They are reasonable in that respect, but sadly I would have rather had the replacement than the cash on a few things, mainly micro piiers/cutters
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[13:14:57] <jymmmm> Hey Lawrence
[13:15:17] <jymmmm> Awww how cute, a 80mm radator... https://www.amazon.com
[13:16:31] <jymmmm> Maybe I cna make an upgrade to the garage ghetto AC
[13:20:15] <gregcnc> how does the heat exchanger help?
[13:22:14] <jymmmm> gregcnc: pulls colder water across the radiator
[13:24:08] <gregcnc> what are you doing now that this would help?
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[13:26:24] <jymmmm> I could use 32 lbs of ice instead of just 8lbs
[13:26:26] <jymmmm> https://cdns.webareacontrol.com
[13:27:04] <jymmmm> basically just better energy transfer
[13:27:15] <jymmmm> thermal transfer*
[13:27:50] <jymmmm> I still prefer passive though
[13:28:29] <gregcnc> where does the ice come from?
[13:29:17] <jymmmm> the crap load of one gallon jugs of water I have in the freezer. When one melts, jsut swap it out
[13:29:40] <gregcnc> please don't tell me this freezer is in the garage you are trying to cool
[13:30:04] <jymmmm> Four 2L soda bottles would fit nicely in a 5gal bucket
[13:30:38] <jymmmm> Yep it is, it's mostly the humidty that gets me, this helps big time
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[13:31:11] <beanbag-> anyone use epson rc+ sw
[13:31:27] <beanbag-> yes I know what channel this is but some people here have experience in many platforms
[13:33:29] <gregcnc> how much water do you get from the air? the biggest problem is the freezer puts the heat+losses from making the ice into the room
[13:37:02] <jymmmm> gregcnc: It's just spot cooling, not whole garage cooling,
[13:39:37] <jymmmm> gregcnc: But... If you had a coil of plastic tubing zip tied to the fan, then a small pump in a 5gal bucket, you could toss four 2L soda botltes that are frozen with water, and jsut swap them out as they melt. would work pretty good
[13:40:10] <jymmmm> It's just a bigger version of that pic I linked to above
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[13:42:35] <jymmmm> gregcnc: YOu don't need copper tubing, but you get the idea... https://www.youtube.com
[13:43:13] <jymmmm> gregcnc: Instead of blocks of ice, just repurpose 2L soda bottles and refreeze as needed
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[13:49:39] <jymmmm> gregcnc: Those ice therapy machines are pretty effective. They even have pump speed control, the slower it pumps the colder it gets.
[13:50:55] <Dolence> Hi! Thinking in upgrading my router, it actually uses hybrid stepper motors (easy drivers) and parallel port to generate steps
[13:51:54] <Dolence> I'm tempeted to get a Mesa card or ethernet controller
[13:53:16] <gregcnc> no doubt about how it works. Though if you use this often i'd be tempted to permanently install the cold side in a minfridge
[13:56:15] <Dolence> How would it work with easy servos? Actually the hybrid steppers are directly connected to drivers (power cable and encoder cable) in a closed loop. Linux CNC only generate steps/dir.
[13:57:36] <Dolence> Using a Mesa would be possible to connect the encoder return to the mesa itself/linux cnc? I mean, making it a real closed loop?
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[14:01:47] <jymmmm> gregcnc: I actually do have a 2CF mini frig I got for free, It works great, but IDK if it could "keep up" compared to solid blocks of ice in a bucket
[14:02:34] <gregcnc> I mean put a big container of water in there with a coil
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[14:04:08] <jymmmm> gregcnc: Yeah, I do understand, but bottle of water frozen over 24hrs, compared to an insulated mini frig with BTU's bing pumped out on demand; It would kind be like just leaving the frig door open and blowing a fan on it.
[14:04:40] <gregcnc> it would freeze just he same while not using it
[14:05:02] <jymmmm> It's a mini frig, not mini freezer
[14:05:40] <gregcnc> what kind fo temperature and humidity are you dealing with
[14:06:03] <jymmmm> gregcnc: I have about 100 lbs of frozen jugs of water in the freezer, so it's easy to swap out as it melts and let refreeze in 24 hours
[14:06:35] <jymmmm> 95-104f @ 40%
[14:06:53] <Dolence> ahn... am I in the right place?
[14:08:13] <gregcnc> dolence I think it's been done but I don't have any experience with hybrid steppers
[14:08:25] <gregcnc> I don't think you gain much however
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[14:11:28] <Dolence> I'm having some issues. My machine doesn't seem to have any backlashes. Still round cuts aren't perfect. I thought it could be related to one of the drivers correcting steps or decelrating while the remaing doesn't because they aren't aware of each other
[14:11:39] <Dolence> I don't know if it makes sense
[14:12:09] <gregcnc> does teh drive allow you to check following error?
[14:12:54] <gregcnc> machine deflection, tool deflection are also real things
[14:14:08] <Dolence> What it mean? English isn't my main language... Machine deflection?
[14:14:22] <gregcnc> the machine bends
[14:14:43] <gregcnc> depends on machine design and loads
[14:15:40] <Dolence> Ah... Doesn't seem to be the case... I got jagged edges
[14:15:54] <Dolence> Holes aren't smooth
[14:19:34] <gregcnc> what kind of machine?
[14:22:27] <Dolence> Custom made/DIY
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[14:22:33] <Dolence> I will send you some pictures
[14:23:03] <Dolence> blob:https://web.whatsapp.com/aa212788-9da6-48f5-8ef5-fafb7c59fb7c
[14:23:09] <Dolence> blob:https://web.whatsapp.com/138db921-4a31-4aa5-86d2-bbb0ccec6245
[14:23:14] <Dolence> blob:https://web.whatsapp.com/18c5e138-004e-479c-b31c-c815a2bd3191
[14:23:19] <Dolence> blob:https://web.whatsapp.com/cf5c47ae-57f3-43ed-a7f8-8a904ca0fe60
[14:23:54] <Dolence> Ah, it doesnt' work this way... I will upload to imgur
[14:25:27] <Dolence> https://imgur.com
[14:27:20] <Dolence> I found this picture, it's simillar to what I'm having...
[14:27:25] <Dolence> https://www.cnczone.com
[14:29:46] <Dolence> I'm not using any reduction, rack, pinion, belt etc
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[14:30:14] <Dolence> I'm direct driving all the 3 axis
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[14:53:20] <Dolence> gregcnc I have sent a couple of pictures on the imgur link above
[14:54:01] <gregcnc> the machine looks substantial. when interpolating a hole, is the problem all the way around?
[14:54:56] <Tom_L> those screws look pretty coarse
[14:55:22] <perry_j1987> this precision matthews PM-728VT looks pretty darn nice
[14:55:33] <Tom_L> go buy it
[14:55:45] <perry_j1987> working on it
[14:55:57] <perry_j1987> so many options out there
[14:56:08] <perry_j1987> making sure not wasting money
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[14:57:03] <Rab> Dolence, what is your calculated resolution for X/Y?
[14:57:28] <Tom_L> gregcnc, i wonder if his lead screws are too coarse
[14:58:37] <gregcnc> could be, but that would seem obvious
[14:59:01] <Tom_L> the cnczone pic isn't his but an example
[14:59:22] <Tom_L> maybe obvious to some
[15:00:07] <gregcnc> with enough torque and resolution it should work, but I guess i dont' really know what those hybrid steppers are capable of
[15:00:19] <Tom_L> yeah me either
[15:00:46] <Tom_L> or the spindle speed
[15:01:03] <gregcnc> dolence which motor and drive is being used?
[15:04:17] <Tom_L> now you got me lookin at dividing heads for my mill :(
[15:05:54] <Tom_L> i'd have to find a small one
[15:05:55] <gregcnc> I have a part I want to produce that needs two operation at 90° so I'm trying to figure out something efficient
[15:06:08] <JT-Shop> someone in NC used my CC number to buy a weed wacker from walmart and it's in transit
[15:06:17] <Tom_L> i did a pin arrangement for jt once
[15:06:24] <Tom_L> don't even remember what it was for now
[15:06:30] <Tom_L> he might
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[15:08:39] <JT-Shop> me?
[15:09:10] <Tom_L> yeah you were trying to divide something
[15:09:18] <Tom_L> probably a year or more ago
[15:10:18] <Tom_L> was basically 2 hole patterns in a couple plates or something like that
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[15:13:21] <Tom_L> http://tom-itx.no-ip.biz:81
[15:13:33] <Tom_L> JT-Shop, do you recall what that was for?
[15:14:08] <JT-Shop> don't recall that
[15:14:38] <Tom_L> 2016
[15:14:42] <Tom_L> me either now
[15:18:43] <Dolence> Sorry, I was on phone
[15:18:57] <Dolence> X and Y are 12 n.m
[15:19:44] <Dolence> Z 4 n.m
[15:20:02] <Dolence> I will try to find the driver and easy servo datasheet
[15:20:09] <gregcnc> 20mm pitch screws
[15:20:19] <gregcnc> ?
[15:20:20] <Rab> Dolence, I don't recognize the units. Can you convert to mm, please?
[15:20:44] <gregcnc> steps per rev?
[15:20:48] <gregcnc> N-m
[15:21:36] <Dolence> 12 newton-meter
[15:21:44] <Dolence> screws are...
[15:22:58] <Dolence> 32 with pitch 25 on Y
[15:23:14] <Tom_L> gregcnc, dunno what you're doing but you could pin a couple plates to get your angles if you wanted something simple
[15:23:15] <Dolence> 25 with pitch 20 on X
[15:23:19] <Tom_L> like that pic
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[15:24:26] <Tom_L> 32mm pitch on x and 25mm pitch on Y?
[15:24:43] <gregcnc> and step resolution?
[15:25:03] * Tom_L is betting that might be the issue
[15:26:39] <Dolence> Sorry, it's 32mm pitch 25mm on Y and X and 25mm pitch 20mm on Z
[15:27:01] <gregcnc> quite course for cutting metal
[15:27:45] <gregcnc> pfft coarse even
[15:28:04] <Tom_L> yeah
[15:28:13] <Tom_L> teach him proper engrish
[15:29:21] <Dolence> Microstepping is 4
[15:29:57] <gregcnc> do you have a pic of the part?
[15:30:07] <Dolence> 32 steps per mm
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[15:31:24] <Dolence> It's worse on higher speeds, even when cutting MDF. It seems to be direct related to motion speed
[15:32:16] <Dolence> I used to have an smaller machine, never had issues like this. And it was running on common steppers.
[15:37:38] <gregcnc> are the drives properly configured?
[15:37:38] <CaptHindsight> 200 step/rev and microstepping at 4 is 0.04mm for the 32mm pitch
[15:37:38] <gregcnc> do the steppers make teh expected torque?
[15:37:38] <CaptHindsight> and 0.03125mm for the 25mm pitch screw
[15:37:38] <gregcnc> does anyone also have issues with these motors or drives?
[15:37:38] <gregcnc> have you measured deflection while loading an axis?
[15:37:38] <gregcnc> is the issue both x and Y?
[15:37:38] <Rab> I would not expect that resolution be visible in MDF, or to vary with speed. Sounds like a following error in the drive, maybe.\
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[15:40:32] <CaptHindsight> well go through it step by step
[15:40:55] <CaptHindsight> is this an new problem or starting from first use?
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[15:41:11] <Dolence> from first use
[15:41:15] <Dolence> https://imgur.com
[15:41:28] <CaptHindsight> what voltage are the stepper drives at?
[15:42:00] <gregcnc> that looks like chatter and backlash at the quadrants
[15:42:15] <CaptHindsight> can you measure lash by pushing and pulling each axis around?
[15:42:39] <CaptHindsight> how rigid is this thing?
[15:43:15] <gregcnc> looks beefy though the upright don't have any sideways bracing
[15:43:26] <Dolence> It doesn't move at all
[15:43:32] <Dolence> There is no backlash for sure
[15:44:06] <gregcnc> measured with what?
[15:44:18] <Dolence> It's very sturdy
[15:45:56] <CaptHindsight> how long is the cutting tool?
[15:46:15] <CaptHindsight> https://i.imgur.com
[15:46:46] <Dolence> cutting piece? is 22mm
[15:47:39] <Dolence> gregcnc I mean, it doesn't have any aparent movement when forcing axis by hand
[15:47:55] <gregcnc> but you only needs microns to see what you're seeing
[15:48:15] <Dolence> I see... How could I measure it?
[15:48:21] <CaptHindsight> 400-600W spindle? ER-16 collet size?
[15:48:41] <gregcnc> dial test indicator
[15:49:10] <Dolence> 3 hp ER-20 collect chuck
[15:49:24] <Dolence> 24000 rpm
[15:51:05] <gregcnc> as I mention early on, tool deflection is real. This is influenced by the cutting parameters.
[15:51:25] <Dolence> https://neomotion.com.br
[15:52:08] <gregcnc> just a lot to learn is all
[15:54:36] <gregcnc> do straight cuts look any better?
[15:55:45] <Dolence> Yes
[15:56:02] <gregcnc> even with a very good machine and high resolution, steppers won't necessarily produce great finishes on interpolated moves
[15:57:07] <gregcnc> the metal cutting stepper driven machines i'm familiar with have 400-2000 step/mm resolution
[15:57:28] <Dolence> Could it be the post processor?
[15:57:54] <Dolence> Should I use a higher microstepping to test?
[15:58:07] <gregcnc> is the arc move G1 or G2/3?
[15:58:29] <Dolence> Sometimes, even when doing a straight line, it seems to pass the point and go back a little on corners
[16:00:21] <gregcnc> that may be a tuning issue. but I have no idea about tuning hybrid steppers
[16:01:06] <gregcnc> If the drives let you check following error that would be a good place to start
[16:01:14] <Dolence> I will try higher microstepping and see if a lern something about tuning this steppers
[16:01:25] <Tom_L> climb or conventional cutting might change the way it looks
[16:01:31] <Dolence> And measure backlash as you told me
[16:02:21] <Tom_L> they've come up with fancy variable pitch cutters too to help eliminate chatter
[16:02:29] <Tom_L> probably not your problem here though
[16:02:51] <Dolence> arc moves are G3
[16:03:22] <gregcnc> the post is not causing this
[16:04:24] <Dolence> Tomorrow I will do some tests and report back. Thank you very much for all the insights!
[16:08:40] <Tom_L> Dolence, where are you from?
[16:09:34] <Dolence> Brasil
[16:13:43] <CaptHindsight> OT I noticed that brazil has some of the highest import taxes 50-100%
[16:14:03] <CaptHindsight> even on items not produced in Brazil
[16:14:40] <CaptHindsight> what is the idea there? To promote manufacturing in Brazil for products not yet made there?
[16:15:17] <Dolence> It's true. 60%~ + ICMS
[16:15:25] <Dolence> In the end it will be somewhat around 100%
[16:16:07] <Dolence> It's a nonsense
[16:16:27] <CaptHindsight> it's tough to start production where all your machines and materials cost 2x as other pay
[16:16:39] <perry_j1987> use to know someone from Natal Brazil
[16:16:45] <perry_j1987> absolutely beautiful area
[16:16:45] <roycroft> the idea is to put more money in bolsonaro's pockets
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[16:17:51] <CaptHindsight> why I am asking a native of Brazil, the duties way predate anything by Bolsonaro
[16:18:02] <Dolence> It's not true roycroft
[16:18:13] <Dolence> It's been this way since decades
[16:18:43] <Dolence> Actually Bolsonaro have plans to reduce tributary charges
[16:18:50] <Dolence> Congress blocks
[16:18:58] <CaptHindsight> ~15 years we looked at brazil for possible PCB manufacturing, since there were a couple state of the art fabs there
[16:19:54] <Dolence> In my region are some
[16:20:02] <Dolence> I live in Curitiba/PR
[16:20:47] <jymmmm> Loetmichel: Are you an audiphilie? https://www.youtube.com
[16:21:08] <jymmmm> ve7it: Nice lil project for you... https://www.youtube.com
[16:21:51] <CaptHindsight> Dolence: I understand why taxes could be so high to protect Brazillian made products, but if none are made there and the tax is high does it actually encourage people to start making those products?
[16:23:12] <Dolence> I don't think so. Our industry still outdated with some rare exceptions like PCB manufacturing
[16:24:00] <Dolence> All the companies are moving to Paraguay
[16:24:13] <Dolence> Almost zero taxes when compared to here
[16:25:32] <CaptHindsight> good to know
[16:26:15] <Dolence> And their government offers lots of advantages like subsidies on energy, less labor taxes, low taxes loans etc
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[16:29:40] <CaptHindsight> Dolence: also check if the quality of the cut changes depending on how deep you cut
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[16:31:19] <CaptHindsight> bbl, have to get metal before they close
[16:31:21] <ve7it> jymmmm, having a look.. i like speakers
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[16:32:39] <jymmmm> ve7it: Yeah, I like the idea of the flat 2ft sq foam panels. Could layer with speaker cloth for a nice look
[16:33:24] <jymmmm> ve7it: And someone mounted those exciters on a 2x4 for bass
[16:44:02] <CaptHindsight> voice coils are for motors!
[16:46:15] <jymmmm> CaptHindsight: Per your request.... https://www.youtube.com
[16:47:11] <jymmmm> CaptHindsight: Run that thru your CNC thingy!!!
[16:51:08] <jymmmm> What can you do with 1140 FARAD cap?
[16:51:43] <gregcnc> wut?
[16:52:02] <jymmmm> $16, might be fun to play with
[16:52:18] <jymmmm> only 2.7V though
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[16:54:46] <Tom_L> jymmmm, lick it
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[17:13:13] <JT-Cave> Missouri just passed the 30k mark for covid 19
[17:14:06] <XXCoder> georgia apparently passed 118k cases, and goverator passed law banning mask mandate
[17:14:15] <XXCoder> great way to make numbers bigger. bigger is better right?
[17:15:01] <JT-Cave> that's pretty dumb of the governor
[17:15:13] <XXCoder> yeah
[17:16:11] <Tom_L> i was down there when it all started.. their mentality is questionable
[17:16:48] <roycroft> the man had to cheat to get elected in the first place
[17:17:13] <roycroft> but he's not the dumbest governor in the country
[17:17:36] <XXCoder> it sucks when plague is polititized
[17:17:41] <roycroft> both florida and oklahoma beat georgia in the dumbest governor contest
[17:17:44] <roycroft> yes, it does
[17:17:55] <roycroft> but that shows how little regard some people have for the lives of others
[17:18:28] <XXCoder> yeah
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[17:20:14] <Tom_L> the reported numbers are probably moderate
[17:20:25] <Tom_L> not everyone that needs a test is getting it
[17:20:42] <roycroft> and we'll have absolutely no idea what the numbers are going forward
[17:20:49] <Tom_L> i know even here the system is overwhelmed
[17:21:06] <roycroft> because hospitals have been ordered to report directly to the white house, and are not allowed to send their numbers to the cdc any more
[17:21:21] <Tom_L> site that please
[17:21:28] <XXCoder> yeah and some sites is now blank
[17:21:29] <roycroft> it's been all over the news for two days
[17:21:30] <XXCoder> https://www.cnbc.com
[17:22:13] <Tom_L> i don't watch it
[17:22:25] <roycroft> i check various online news sites a couple times/day
[17:22:32] <roycroft> i don't watch television news
[17:22:40] <roycroft> but it has been widely reported
[17:22:54] <roycroft> i'm not saying that you should have known
[17:22:56] <Tom_L> i figure i'd just be getting someone's version of it
[17:23:08] <roycroft> i'm just saying that's why i did not have a citation at my fingertips
[17:24:23] <roycroft> you suggested the other day that i'm making this political, tom_l
[17:24:35] <roycroft> quite the opposite - i'm really pissed off that it has been made political
[17:24:51] <roycroft> and the information that i trust and believe comes from doctors and scientists
[17:24:54] <roycroft> not from politicians
[17:25:09] <roycroft> but it's getting harder to even get that information first hand now
[17:34:21] <Tom_L> sounds to me that partially the CDC couldn't keep up
[17:36:14] <roycroft> the cdc are a mostly career scientist organization
[17:36:23] <roycroft> hhs are a mostly political organization
[17:36:33] <roycroft> i.e. full of political appointees
[17:36:38] <roycroft> who can be controlled and fired
[17:37:11] <roycroft> the cdc were publishing those data every single day since the pandemic began
[17:37:55] <roycroft> and if they "could not keep up" the appropriate response would be to get them more resources, not to take away part of their core functionality and hide it under a political umbrella
[17:40:38] <Tom_L> the worker that tested positive at my kid's work reported back today without a negative test
[17:42:28] <roycroft> that is really scary
[17:42:46] <Tom_L> XXCoder's work was shut down for sanitation becasue obviously someone teste positive
[17:43:02] <Tom_L> everyone there should have been tested. they're back to work
[17:43:24] <roycroft> and my boss is defying the law and refusing to wear a mask, and told me not to wear one last time i was in the office
[17:43:29] <roycroft> so i'm not going back to the office
[17:44:14] <Tom_L> i'd estimate about 1/3 the ppl i see aren't
[17:44:17] <roycroft> he is one of the people who doesn't get that by making things worse all he's doing is making things worse
[17:44:35] <roycroft> we're at about 98-99% compliance indoors here now
[17:45:00] <roycroft> but our order to wear a mask outdoors as well when social distancing is not possible just went into effect two days go
[17:45:02] <roycroft> ago
[17:45:09] <Tom_L> the masks most use won't prevent anything. they just keep your germs closer to you
[17:45:25] <roycroft> it will probably be another week or so before there is widespread compliance
[17:45:30] <roycroft> that is the whole point
[17:45:52] <roycroft> to keep people from spreading it easily
[17:46:01] <roycroft> it's not to protect the wearer at all
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[17:46:35] <Tom_L> walk in and sneeze on your boss
[17:46:40] <Tom_L> see what he does
[17:46:58] <roycroft> and in the medical community it is universally believed, because the evidence is there, that they are quite effective for their intended use
[17:47:28] <roycroft> if i'm honest, i'm not sure he even believes that the novel corona virus even exists
[17:47:37] <roycroft> he did at first
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[17:47:56] <roycroft> but then he started ranting about nancy pelosi and using the word "hoax" a lot
[17:48:13] <roycroft> i think he's convinced himself that the pandemic is not real and that nobody has died of covid-19
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[19:57:19] <Tom_L> which is more widely used, a 14.5 or 20 deg pressure angle for involute gears?
[19:58:30] <perry_j1987> i give up. which? :P
[19:58:39] <perry_j1987> waiting for the punchline
[19:58:51] <Tom_L> pretty sure 20 but it was a question
[20:05:21] <jdh> more power vs. stronger teeth it appears
[20:05:49] <Tom_L> that's what i'm seeing
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[20:07:49] <jdh> http://hessmer.org
[20:08:46] <Tom_L> i've got a macro for my cad cam to build them
[20:09:32] <Tom_L> haven't looked at it in quite a while
[20:09:58] <Tom_L> i wrote one for sprockets
[20:11:05] <Tom_L> it covers pressure angles from 14.5 to 45
[20:17:20] <CaptHindsight> came across a sewing machine from 1875, might convert to CNC
[20:22:52] <roycroft> that was not fun
[20:23:02] <roycroft> i had to break down the first round of boards for my new workbench
[20:23:28] <roycroft> they're way too big to handle comfortably in my shop, so i mved my bandsaw and jointer out onto my driveway
[20:23:37] <roycroft> 36 degrees, no wind, no shade
[20:23:49] <roycroft> 2 1/2 hours out there in the heat
[20:24:06] <roycroft> when i was done i had to wear gloves to move the machines back inside because they were too hot to touch with my bare hands
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[20:24:58] <CaptHindsight> stop it, the hot weather starts there and moves here after a day or two, so just stop it please
[20:25:07] <roycroft> and this was only about 1/3 of what i need - i have to wait a couple weeks until my hardwood supplier gets more before round two
[20:25:13] <roycroft> and it will probably be even hotter then
[20:26:25] <roycroft> i did survive
[20:26:37] <roycroft> i think next time i'll set up an ez-up so i have a little shade
[20:26:45] <roycroft> at least part of the time
[20:27:01] <roycroft> the boards are 10-12' long, so i need 25 feet to work in
[20:27:11] <roycroft> 3 ez-ups
[20:27:38] <roycroft> anyway, summer is here
[20:27:48] <roycroft> now that it's over half over
[20:31:20] <Tom_L> roycroft, was it you that recently got a dividing head?
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[20:58:51] <roycroft> i got a rotary table not too long ago with dividing head plates
[20:59:01] <roycroft> well, that was a year or more ago
[20:59:07] <Tom_L> no 3jaw with it?
[20:59:10] <roycroft> somewhat recent
[20:59:44] <roycroft> no, but i had a 4 jaw for my mini lathe that i wasn't using, so i adapted that to fit
[20:59:53] <roycroft> it's a 6" rotary table
[21:00:00] <roycroft> and a 4" 4 jaw
[21:00:45] <roycroft> the 4 jaw had been sitting in a box, never opened, for about 10 years, so i figured it was ok to drill some holes through it and mount it on the rotary table
[21:01:04] <roycroft> that was actually pretty funny
[21:01:38] <roycroft> because when i came up with the idea i was horrified at the thought of drilling holes through a chuck like that, but i could not figure out why i was horrified
[21:01:48] <roycroft> so i came here to this channel and posed the question
[21:01:59] <roycroft> the reaction from everyone was that they were horrified at the thought
[21:02:11] <roycroft> but when pressed as to why, nobody could figure out why
[21:02:19] <roycroft> it just seems wrong
[21:02:36] <roycroft> i went ahead and did it
[21:03:17] <roycroft> i've only used it a couple or three times, but it has workd out well
[21:03:46] <roycroft> and while a bit more fiddly to set up, it's more accurate than a 3 jaw would be
[21:04:34] <roycroft> i had one part to make where i had to mount an x-y table on top of the rotary table
[21:04:44] <roycroft> that setup took a long time
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[21:05:13] <roycroft> and on my mini mill i barely had room to mount the part on top of the stack when all was set up
[21:05:23] <roycroft> it's a good thing the part was only 1/2" thick :)
[21:05:32] <Tom_L> that's my concern with a dividing head
[21:08:08] <roycroft> what?
[21:08:15] <roycroft> the setup time or the clearance?
[21:08:34] <Tom_L> clearance
[21:08:59] <roycroft> keep in mind that i had a rotary table set on the mill table
[21:09:14] <roycroft> and then a fairly tall x-y table mounted on top of the rotary table
[21:09:51] <roycroft> there's plenty of clearance without that x-y table
[21:10:05] <Tom_L> well with an index head typically you're gonna be cutting on the side if it's horizontal
[21:10:07] <roycroft> unless you do something like mount a 12" rotary table on a mini-mill
[21:11:07] <roycroft> yeah, so if you have a 6" index head the center of your part is going to be 3" off the mill table
[21:11:32] <roycroft> actually more like 4"
[21:11:52] <Tom_L> i'd like to find a smaller one but they may not be out there
[21:11:54] <roycroft> my machine is an x3 clone
[21:12:03] <Tom_L> i've got 7" z
[21:12:23] <roycroft> oh, that's even less than i have
[21:12:35] <Tom_L> i've considered getting some longer rails
[21:12:36] <roycroft> i bought a harbor freight 4" one once
[21:12:42] <roycroft> i kept it for about 10 minutes
[21:13:05] <Tom_L> i got an x y table from somewhere i've never used
[21:13:17] <roycroft> it was not only horribly made, it was so small there was hardly any room to work with it as far as mounting parts and the like
[21:13:46] <roycroft> i think i'd be frustrated with even a well made 4" rotary table
[21:13:57] <roycroft> i'd like bigger than the 6" one that i bought
[21:14:05] <roycroft> but i just can't see putting anything bigger on my machine
[21:14:17] <roycroft> if i had a bridgeport class machine i'd go for a 10" or maybe even 12"
[21:14:32] <Tom_L> yeah if i wanted a rotary table it would be a different story
[21:15:21] <Tom_L> most of the ones i've seen have a 5" chuck
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[21:15:56] <roycroft> i don't know what kind of parts you need to make, but it's pretty straightforward to make indexing plates for a lathe
[21:16:18] <roycroft> you might be able to make a milling setup for the lathe and do your indexing work on it
[21:16:28] <Tom_L> my lathe is shot
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[21:19:57] <roycroft> aah, so that's out
[21:20:29] <roycroft> if you can use collets, you might be able to conserve space by using a collet holder instead of a chuck
[21:28:53] <unterhaus_> roycroft: I have a palmgren xy vise and it's really frustrating to use because there is not much travel. But it's a pretty nice vise.
[21:29:44] <unterhaus_> have thought about selling it before I drill any holes in it.
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[21:46:49] <pink_vampire> no one here?
[21:56:29] <roycroft> we all have our masks on and are invisible
[22:12:39] <pink_vampire> poor Diresta all those tools but no 4 jaw independent and a dial indicator!! O_o https://youtu.be and the result https://youtu.be
[22:13:32] <pink_vampire> all this video he is torture his lathe and mill and make every machinist want to cry
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[23:02:14] <veegee> unterhaus_ I was about to buy this: https://www.globalindustrial.ca
[23:02:26] <veegee> Just because it's the only 3 phase bench grinder with a reasonable price
[23:02:43] <veegee> Other than that, never even heard of that brand before
[23:08:32] <skunkworks> https://youtu.be
[23:09:32] <veegee> Wait what is that an appropriate use for a CNC lathe?
[23:09:58] <veegee> Or is that more a "hey see what my G code can do!"
[23:10:46] <veegee> Also how is that underpowered? It seems like it's taking some decent material off
[23:11:33] <Tom_L> is that partially a function of the speed mode?
[23:11:45] <Tom_L> css
[23:12:27] <skunkworks> It is 'hey - linuxcnc is cool' ;)
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[23:13:51] <skunkworks> no - it is just slowing down at the corner.. The mill - which has a bit stronger spindle - doesn't do that.
[23:14:18] <skunkworks> I plan on gearing it down a bit more. And a bit more tuning.
[23:14:42] <Tom_L> if you ever watched my sherline rigid tapping video, it stops too but made a good thread
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[23:16:07] <skunkworks> currently it is about 3:1 - have the stuff coming to do 5:1
[23:16:21] <Tom_L> https://www.youtube.com
[23:16:35] <Tom_L> the axis follows it no matter what
[23:17:05] <skunkworks> right - same with the polygon turning
[23:17:12] <skunkworks> slaved motion
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[23:17:42] <skunkworks> Tom_L: awesome!
[23:17:52] <pink_vampire> sherline with servo spindle!!!
[23:18:00] <Tom_L> that's an old one
[23:18:17] <pink_vampire> this is not your mill?
[23:18:23] <Tom_L> pink_vampire, that control is on my new mill now
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[23:18:33] <Tom_L> as is the spindle
[23:18:50] <skunkworks> https://www.youtube.com
[23:18:55] <pink_vampire> what motor / controller are you using?
[23:19:08] <Tom_L> it's all sherline
[23:19:15] <Tom_L> i just put it on a bigger mill
[23:19:28] <Tom_L> the spindle that is
[23:19:42] <pink_vampire> but how do you read the position?
[23:19:59] <pink_vampire> how linux cnc controlled it?
[23:20:13] <Tom_L> http://tom-itx.no-ip.biz:81
[23:20:21] <Tom_L> added that to the spindle
[23:20:42] <Tom_L> and got rid of the V belt drive
[23:21:08] <pink_vampire> and linux cnc control the Z axis relative to that encoder??
[23:21:17] <Tom_L> http://tom-itx.no-ip.biz:81
[23:21:25] <Tom_L> that was the setup when i did that video
[23:21:30] <Tom_L> i think
[23:21:45] <Tom_L> that was an old printer encoder
[23:21:58] <Tom_L> i since swapped it for a 500cpr one
[23:22:09] <skunkworks> pink_vampire: yes - no need for a 'servo' spindle. The Z axis is slaved to the spindle rotation/postion.
[23:22:25] <Tom_L> it's awesome
[23:22:35] <pink_vampire> skunkworks: this is nice!!!
[23:23:09] <pink_vampire> skunkworks: but yours is servo? or also slave to z?
[23:23:46] <skunkworks> everything I have posted is slaving
[23:24:28] <pink_vampire> can you do that on the LPT interface? or I need mesa card?
[23:25:26] <skunkworks> pink_vampire: it can be done with the printer port.. a 100 line encoder would be more than enough for most things.
[23:25:33] <Tom_L> dunno if there's enough io is there?
[23:25:35] <skunkworks> the little emco lathe has only 100 line
[23:25:45] <skunkworks> well - yes - you need the i/o
[23:26:03] <pink_vampire> I'm thinking about converting the lathe to cnc
[23:26:11] <skunkworks> the emco is printer port controlled - but only 1 channel + index encoder
[23:26:38] <pink_vampire> but I become very good just using the dials (no dro)
[23:27:40] <pink_vampire> I have the CUI AMT102 encoder
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[23:29:05] <pink_vampire> so I just add a timing belt like GT2 from the axis of the lathe to an encoder, and replace the Z axis with servo and ball screw?
[23:30:03] <skunkworks> you would want X also...
[23:31:22] <pink_vampire> sure!
[23:32:42] <skunkworks> but yes - that is basically it.
[23:33:09] <skunkworks> if the mach people only knew how easy it is got get a treading lathe working...
[23:33:18] <skunkworks> threading
[23:33:25] <skunkworks> treadling?
[23:33:52] <pink_vampire> I want to make taper screw
[23:34:00] <skunkworks> Hmm - a cnc'ed threadle lathe...
[23:34:34] <pink_vampire> I wish I had something like that on the mill
[23:34:45] <skunkworks> or.... https://www.youtube.com
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[23:39:01] <pink_vampire> skunkworks: This is sooo cool
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[23:41:29] <pink_vampire> is that make sense 80mm diameter slitting saw, 72 tooth, in aluminum, 485 rpm, and 887 mm/min feed??
[23:42:52] <Tom_L> sounds approximate
[23:43:17] <Tom_L> what's the chip load?
[23:46:45] <pink_vampire> no idea
[23:46:58] <pink_vampire> I just did 0.001
[23:47:29] <pink_vampire> like 0.25mm
[23:47:40] <Tom_L> my spindle isn't beefy enough for cutters like that
[23:47:44] <Tom_L> i tried one
[23:47:50] <pink_vampire> HSS, 72 tooth, 80mm diameter, 1.2mm thickness of the blade - material 6061 T6
[23:48:31] <pink_vampire> try to put it on the 60K spindle
[23:49:19] <Tom_L> i wouldn't :)
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[23:52:12] <pink_vampire> you must use carbide seam to connect the blade, so it will be able to snap and fly