#linuxcnc | Logs for 2019-01-12
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[00:11:00] <veek> (heavy metals in mussel shells when grinding them) https://www.bbc.com
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[01:06:56] <elmo40> many bottom feeders are laced with heavy metals
[01:07:29] <elmo40> check out lobster and prons! plenty of crap in them... hence why they taste lovely, I bet. LoL
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[01:26:10] <HighInBC> bottom feeders eat fish poo
[01:26:35] <HighInBC> might as well boil up some dung beetles and eat those
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[02:14:06] <Jymmm> wood generator https://www.youtube.com
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[02:49:11] <fragalot> Jymmm: wood powered cars used to be a thing
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[03:25:05] <Deejay> moin
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[05:07:42] <veek> Oo check this out: https://www.minerals.net
[05:08:01] <veek> the black stuff is actually eroded emery
[05:08:29] <XXCoder1> it pops up something that errors out when i click anywhere,. dang
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[05:58:12] <jthornton> morning
[05:58:28] <XXCoder1> hey jthornton how was things in here last 2 days lol
[05:59:34] <jthornton> about the same
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[06:00:12] <XXCoder1> lol ok
[06:00:22] <XXCoder1> had bad internet access issues here finally resolved
[06:00:24] <XXCoder1> router died
[06:00:53] <jthornton> dang, got a new faster one now?
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[06:01:43] <XXCoder1> old one was pretty high end but also over 5 years old
[06:01:59] <XXCoder1> we use a lot of internet everyday, many people lol
[06:02:11] <jthornton> 5 years old is not very old
[06:02:42] <XXCoder1> average routers tend to last 3 years
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[06:05:22] <jthornton> that don't sound right, what kills a router that fast?
[06:05:33] <XXCoder1> heavy and constant usage
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[06:18:30] <gloops> a couple of used routers ive bought the speed control burnt out
[06:19:01] <gloops> 20k revs though, they are usually only 2 bearings, the top one pretty small
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[06:19:46] <XXCoder1> not that kind of router
[06:23:22] <gloops> ah
[06:36:45] <jthornton> lol
[06:42:47] <XXCoder1> https://www.youtube.com tormach machine
[06:42:53] <XXCoder1> pretty good review so far
[06:42:55] <XXCoder1> pros and cons
[06:43:45] <syyl> thats the custom keyboard-button guy, right?
[06:44:00] <XXCoder1> no idea?
[06:44:31] <Deejay> hi syyl
[06:47:33] <XXCoder1> dang
[06:47:39] <XXCoder1> tormach spindle is bad designed
[06:47:52] <XXCoder1> minor crash you need to do complete rebuild of entire spindl;e
[06:48:00] <syyl> he considers a 1/4" endmill in steel max
[06:49:26] <syyl> they went with that annoying R8 design for the spindle and are stuck with it now
[06:49:41] <XXCoder1> just change it over and sell cheap kits
[06:49:52] <XXCoder1> basic cat30 could work
[06:50:02] <XXCoder1> or maybe cat40 if its large enougg. hard to see scale in video
[06:50:10] <syyl> the new, more expensive tormachs have 30 taper as an option
[06:50:52] <XXCoder1> largest tool and taper I ever used was cat50 with 8" extension neck with 12" diameter facemill
[06:51:10] <sync> the spindle catridges are pretty robust from what I hear
[06:51:13] <XXCoder1> its so heavy I barely can lift it, i had to "knee" it up into spindle.
[06:51:25] <syyl> they are a very basic design, sync
[06:51:27] <sync> their reasoning was that people with a bridgeport want a cnc mill
[06:51:29] <syyl> not much to fubar there :D
[06:51:32] <sync> yes, but it works
[06:51:44] <syyl> a pipe, another pipe, a bunch of bearings
[06:51:51] <syyl> presto, a spindle
[06:52:00] <XXCoder1> lol basically
[06:52:35] <XXCoder1> would it be possible to use air bearings for spindle lol
[06:52:38] <XXCoder1> super high rpm
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[06:56:39] <sync> sure, but most people don't surface with a .1mm radius ball
[06:56:52] <XXCoder1> lol
[07:05:23] <tehnull> https://www.youtube.com
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[07:09:35] <Tom_itx> 34°F, snow missed us by a couple degrees
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[07:11:07] <jthornton> same here we got a bit of sleet but that is all
[07:11:26] <Tom_L> tiny bit of sleet last night but nothing stuck
[07:12:08] <XXCoder1> you know its been long rainy season when you start drive out in night from work, and "hey roads looks weird" then "oh its dry"
[07:12:21] <XXCoder1> next few days nice and sunny
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[09:40:34] <elmo40> XXCoder1, that is a large tool! 12" facemill with 8" extension? i bet that was heavy to handle.
[09:41:28] <elmo40> air spindles are light weight but super fast. 20,000RPM or more. They mist a light oil to help cool everything.
[09:42:22] <elmo40> makes a mess everywhere! just think of a normal air drill with a constant dribble of oil going into the air inlet. Fog everywhere! Need an enclosure with a ventilator.
[09:43:38] <SpeedEvil> Or just go with it and add disco lights and pounding bass.
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[09:48:57] <Deejay> re
[09:57:28] <rmu> XXCoder1: https://www.youtube.com
[10:00:34] <elmo40> my mistake. i was thinking air spindle. where air makes the speed.
[10:02:18] <elmo40> granite lathe bed?? wow. that is so cool.
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[10:28:09] <pcw_home> Yeah, Air bearings are super clean (and need very clean air)
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[10:50:54] <gloops> someone asking about an air spindle on facebook - sticking at 400 rpm for a bit before picking speed up
[10:56:51] <fragalot> good for them
[10:56:52] <fragalot> :)
[11:00:26] <gloops> my spindle was doing that - went right by itself
[11:00:42] <fragalot> clean it, replace the oil with the correct type
[11:00:55] <gloops> no oil in it
[11:01:01] <gloops> cold probably
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[11:50:20] <gloops> https://www.dailymail.co.uk
[11:50:39] <gloops> How 1,000 tiny drones that can scan orders and lift 1,500lbs are replacing humans in warehouse the size of 28 football pitches
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[12:29:04] <fragalot> give the humans something better to do
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[12:42:27] <SpeedEvil> fragalot: 'I have an opening for you in the soylent green production line'.
[12:49:11] <fragalot> https://imgur.com <== that's actually kinda neat
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[13:19:02] <Jymmm> fragalot: I actually have a US gov document showing you how to make a wood powered car, kinda impresive
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[13:28:23] <fragalot> Jymmm: i'm curious how long you have before the spark plugs are covered in tar
[13:30:08] <Jymmm> fragalot: Well, technically that is pre filtered, like you saw in that video earlier
[13:30:28] <fragalot> no more than a cigarette filter does
[13:30:31] <Jymmm> fragalot: Also, it SHOULD be burned off
[13:31:16] <Jymmm> fragalot: When I say "burned off" I mean that it is consumed as fuel, not as a by-product
[13:31:33] <fragalot> perhaps
[13:32:09] <Jymmm> fragalot: In a "perfect" system, the only by product should be CO2
[13:32:11] <fragalot> I mean - they obviously work, i'm just curious how well it works out long term
[13:32:19] <fragalot> well, CO2 and carbon
[13:32:27] <Jymmm> correct
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[13:34:36] <Jymmm> fragalot: I havne't looked into wood GAS as much as full combustion (aka rocket stove style)
[13:35:05] <fragalot> rocket stoves are quite neat
[13:35:13] <fragalot> especially if you can add a lot of mass to it
[13:35:28] <Jymmm> Most designs are pretty crappy
[13:36:02] <Jymmm> rocket stove is just the "engine", rocket mass stove is something else, which I'm looking into more.
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[15:07:14] <elmo40> no, in a perfect system, with a carbon based fuel such as octane, you should only get co2 and h2o.
[15:08:05] <elmo40> but... we have many other gases in the air, mainly nitrogen, that interact with this equation and cause all sorts of chemicals. NOx emmissions are what we are trying to control now.
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[15:26:53] <Jymmm> elmo40: Was speaking applied, not so much "absolute"
[15:35:30] <Jymmm> err, "practical" might be a better word
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[15:47:03] <Jymmm> What is everyone using to "backup" their systems?
[15:47:19] <Jymmm> ...and have you tested restoring too?
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[15:54:05] <roycroft> i primarily use amanda for backups, and yes, i do test the integrity of the backups on a monthly basis
[15:54:32] <roycroft> amanda is not suitable for a single machine, of course, but it's a great network backup system for a server farm
[15:54:56] <roycroft> well, i won't say it's unsuitable for a single machine, but it's overkill by an order of magnitude for a single machine
[15:56:15] <Jymmm> roycroft: Can you restore from it to a replaced dead hdd?
[15:56:47] <roycroft> it's not an imaging backup system
[15:56:53] <roycroft> so no
[15:56:57] <roycroft> one has to reinstall the base os
[15:57:05] <roycroft> but that's what changelogs are for
[15:57:07] <Jymmm> bummer
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[15:57:29] <Jymmm> I'm looking for something very "Time Machine" like, no base os install
[15:57:31] <roycroft> discussing backups is a really large, complex topic
[15:57:40] <roycroft> and i'm trying to get some shop work done today
[15:57:51] <roycroft> i have some mdf to break down, and it's sunny and dry, so i want to do that outside
[15:58:00] <roycroft> i'd be happy to discuss it more later though
[15:58:08] <Jymmm> carry on =)
[16:05:29] <Net|> i wonder why did humans pick 360 to represent a year for radians in a circle ? would 500 make more sense ?
[16:07:49] <Net|> or less even
[16:08:56] <pcw_home> 360 has nicer divisors
[16:10:19] <mozmck> yeah, I've heard something to that effect about the imperial number system as well. 12 is divisible by 2, 3, 4, 6, and 12; whereas 10 only by 2, 5, and 10. Makes a lot of math easier in your head or on paper.
[16:11:09] <pcw_home> Those crafty Babylonians...
[16:11:22] <mozmck> Is that where it came from?
[16:11:37] <pcw_home> Yeah they used base 60 math
[16:11:46] <mozmck> interesting
[16:12:03] <pcw_home> minutes and hours came from them also
[16:12:53] <mozmck> The wikipedia article on duodecimal says the number 12 is a "superior highly composite number"
[16:13:07] <mozmck> https://en.wikipedia.org
[16:13:36] <pcw_home> If we only had 12 fingers we would have been set
[16:15:18] <fragalot> base 10 makes more sense for decimal (get it?) numbers though
[16:15:20] <DaViruz> if only we've had one finger we'd have been using binary from the beginning
[16:15:47] <fragalot> 12 used to be nice because you could divide things using compasses
[16:17:21] <jdh> it's still nice.
[16:17:58] <rmu> with binary you can count up to 1024 with your 10 fingers
[16:18:23] <rmu> probably only if you are some kind of musician
[16:19:09] <jdh> you lose half your span if you are missing a finger from a freak bowling accident.
[16:19:24] <rmu> correction, 1023 if you include 0
[16:19:55] <DaViruz> 512 if you include a sign bit
[16:20:18] <jdh> stick your tongue out if it is negative.
[16:21:18] <DaViruz> 496 with signed floating point binary
[16:25:17] <DaViruz> hm, that can't be right
[16:25:36] <rmu> you could count from -16 to +15 and have the other hand be the exponent
[16:26:13] <rmu> say from -3.2 to 3.0 in 0.2 increments
[16:28:15] <rmu> 1.0 would look funny in this system, thumb is sign, index finger LSB
[16:28:30] <rmu> left hand exponent right hand mantissa
[16:29:41] <Net|> https://www.popsci.com i wonder if this is the reason mayan calendar resets to account for the 5 days over 3k years
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[16:50:59] <Deejay> gn8
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[17:07:01] <gloops> Net| Iluuminati
[17:07:21] <gloops> <Net|> i wonder why did humans pick 360 to represent a year for radians in a circle ? would 500 make more sense ?
[17:23:59] <Jymmm> gloops: http://mathforum.org
[17:25:05] <gloops> yes, basically there are 6 equalitaral triangles in a circle
[17:25:23] <gloops> its all about the sixes ;)
[17:25:38] <gloops> anyway TV time
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[17:46:25] <Net|> https://netpipe.ca << would this work better for light propulsion ?
[17:46:49] <Net|> reflects more than just traveling straight line
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[18:09:06] <SpeedEvil> I have not looked.
[18:09:14] <SpeedEvil> Is that reflecting multiple times off mirrors?
[18:09:36] <SpeedEvil> 'yes' - until diffraction kills the reflection, so it's basically shortrange only
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[18:46:00] <rmu> photon recycling?
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[19:04:31] <XXCoder1> SpeedEvil: would be fanastic if we somwhow discover 100% reflecting surface
[19:05:14] <XXCoder1> then next limit of scattering limit of air itself
[19:05:21] <SpeedEvil> XXCoder1: that doesn't help.
[19:05:36] <SpeedEvil> Even with it, reflectors rapidly stop being useful.
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[19:06:05] <SpeedEvil> A meter reflector will produce a two meter beam at about 1000km
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[19:11:05] <XXCoder1> yeah though perfect refecting surface does have its own uses though
[19:11:11] <XXCoder1> like laser lens with infinite life
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[20:03:03] <norias> hello
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