#linuxcnc | Logs for 2014-01-26

[02:23:06] <Deejay> moin
[05:09:00] <jthornton> morning
[05:17:47] <archivist> panic...made gears for someone in Cyprus, coming to pickup in person tomorrow, have to tidy up
[05:19:03] <RyanS> hes keen
[05:19:20] <archivist> she I think
[05:19:47] <archivist> but dunno with some names
[05:19:58] <RyanS> like 'whatevs'
[05:22:20] <RyanS> They don't make gears too good in Cyprus :P
[05:26:42] <jthornton> you will have to take a photo for the record
[05:27:32] <RyanS> the customer or the gear? :)
[05:27:58] <jthornton> the clean shop
[05:28:21] <archivist> I wish that was possible
[05:28:46] <archivist> specially as I am spread around a house
[05:29:38] <archivist> kitchen for the lathe, a bedroom for the 5 axis and big toys in the garage with condensation dripping
[05:30:37] <archivist> best 3 to cust http://www.collection.archivist.info/archive/DJCPD/PD/2014/2014_01_19_Cyprus_gears/IMG_1735.JPG
[05:32:31] <RyanS> sheesh, you are like the ultimate cliche 'mad inventor'. They should make a documentary about you
[05:32:45] <jthornton> some kind of plastic?
[05:32:58] <archivist> yes a nylon I think
[05:34:09] <jthornton> yuck, I hate to machine nylon
[05:34:31] <archivist> stringy shite
[05:34:53] <jthornton> yea
[05:35:10] <archivist> no blunt tooling to be used at all
[05:35:52] <archivist> will take you a "while" to clean the furries off later too
[05:37:39] <RyanS> Don't get me wrong, it sounds pretty awesome.. It's better than I don't know , spo'srt
[05:37:47] <RyanS> sport
[09:24:03] <CHNCguy> hey hey guys :)
[09:28:19] <PetefromTn> hey man..
[09:36:22] <CHNCguy> crappy internet today ;(....hey guys I am going to make a full manual for linuxcnc, a very streamlined manual so people can move from beginner to advanced in steps, anyone interested in helping me add info to it? I know linuxcnc.org has a manual but I believe it lacks imagination and flow...so by making the manual I will also learn more about linux
[09:36:22] <CHNCguy> cnc
[09:37:29] <archivist> or just fix things in the current manual
[09:37:50] <archivist> probably needs a similar level of understanding
[10:07:40] <JT-Shop> ouch
[10:08:52] <archivist> his comment or mine :)
[10:10:13] <archivist> I know I got fed up chasing around the manual to answer his VFD question yesterday
[10:10:32] <Jymmm> archivist++
[10:12:02] <eric_unterhausen> the problem with emc/lcnc for beginners has always been that there is too much to learn
[10:12:18] <eric_unterhausen> and everyone always seems to want to do things a different way
[10:12:36] <eric_unterhausen> so you can't really have a "beginners" manual because it wouldn't be sufficient for most people
[10:25:05] * JT-Shop looks for a copy of the old manuals
[10:29:19] <Einar_> The current manuals are a lot better than the old ones. There are still things that can be better, but it always will. One thing I'm missing is more about lathes.
[10:29:45] * JT-Shop tips his hat to eric_unterhausen
[10:30:32] <Einar_> Currently the poll shows 7.2% lathe users. Is this because there is little interest, or because many did not figure it out?
[10:31:20] <JT-Shop> I don't think most people take the poll and those that just get it don't even visit the forum or IRC or mailing list
[10:32:34] <Einar_> Maybe, but there are 17 587 voters, so it should be representative?
[10:33:20] <jdh> I would be a lathe user if I could find an X ballscrew solution I liked.
[10:33:33] <JT-Shop> more than I would have imagined
[10:33:44] * JT-Shop thinks a small fire is in order
[10:34:25] <Einar_> What don't you like with the available ballscrews?
[10:35:02] <jdh> fitting one to my X axis.
[10:35:23] <jdh> small lathe, can't go in the original screw location
[10:44:14] <IchGuckLive> Tom_itx: i added blanking to the laser http://youtu.be/1L1VR8U74us
[10:44:55] <IchGuckLive> But i killed the diode the good one on blanking started at powerup so double power bevor warmap AUTSCH
[10:45:21] <IchGuckLive> i got 12 Laser DVD in backup ;-) smile
[10:48:18] <jdh> any better diode source? bluray burner?
[10:48:38] <IchGuckLive> they only got 85mW
[10:48:50] <IchGuckLive> i dont think that is enoph
[10:49:14] <IchGuckLive> but Loetmichel got a 50mW that also burns wood ask him
[10:50:05] <WalterN> CaptHindsight: oh hey, what is that liquid plastic company you work for again?
[10:50:12] <Loetmichel> IchGuckLive: not wood
[10:50:29] <Loetmichel> black glass reinforced plastics
[10:52:40] <IchGuckLive> on ebay i will order a lense and tube holder will see if i can get a brighter path ebay dealer-> ether.deal offers nice for 4EUR
[10:53:01] * Tom_itx gives IchGuckLive a steadycam mount
[10:53:17] <IchGuckLive> Tom_itx: got lots of them
[10:53:31] <IchGuckLive> but i use freehad movement for live action
[10:53:35] <Tom_itx> does the laser work better?
[10:53:51] <Tom_itx> doesn't burn as much where it stops
[10:54:09] <Tom_itx> the 'live action' makes me dizzy
[10:54:15] <Loetmichel> and if i am really hones: i doubt that 50mw
[10:54:27] <Loetmichel> the led casing gets hot VERY quick
[10:54:51] <Loetmichel> and it draws a few 100 mA at 5V
[10:54:54] <IchGuckLive> yes but 1hr for the break the diode now is crap but i keep it till the next break i got a box with 35DVD's and now 12 are left
[10:55:31] <Tom_itx> so i understand you gotta leave it on with low power or it will burn up?
[10:55:36] <Tom_itx> 4ma start
[10:55:50] <Tom_itx> then to burn run at 100ma
[10:55:52] <Tom_itx> ?
[10:55:58] <IchGuckLive> 255
[10:56:05] <IchGuckLive> 265 is the burnout
[10:56:23] <Tom_itx> need aluminum heatsink around it?
[10:56:36] <IchGuckLive> if you go for lm317 i woudt stay with 200mA
[10:56:41] <IchGuckLive> yes
[10:56:55] <Loetmichel> btw: DVD diodes are not really powerful
[10:56:57] <IchGuckLive> look at the part in the ebay link
[10:57:03] <IchGuckLive> http://www.ebay.de/itm/290564548396
[10:57:08] <Tom_itx> CD won't work?
[10:57:19] <Loetmichel> got a 4W IR laser diode some very long time ago... THAT was ok
[10:57:21] <IchGuckLive> this and a lathe cooler will do the 8hr job
[10:57:32] <Loetmichel> Tom_itx: CD lasers are IR, and much elss power
[10:57:35] <Loetmichel> less
[10:57:48] <Tom_itx> ahh
[10:58:00] <IchGuckLive> in the DVD there are 2 Diodes
[10:58:12] <IchGuckLive> one IR to read and one RED to burn
[10:58:52] <IchGuckLive> identified easy as the Red is the one with the cooling outfit
[11:01:27] <IchGuckLive> Tom_itx: the seller got more pices and it reduces the costs in USA i woudt order 10pcs of the laserframe
[11:01:41] <IchGuckLive> and build a very good beamer
[11:02:08] <IchGuckLive> to empress the town on holidays
[11:02:24] <Tom_itx> i'll dig around and see if i have one
[11:02:39] <IchGuckLive> there are effect glases that divides the beams so it looks lige a net or cube
[11:02:39] <Tom_itx> what feed did you use?
[11:03:23] <IchGuckLive> look iat the video its 150mm/min 6in/min
[11:03:33] <Tom_itx> about what i guessed
[11:03:37] <IchGuckLive> the good one had double
[11:04:28] <Tom_itx> laser pointers probably aren't strong enough
[11:04:37] <IchGuckLive> no they arent
[11:04:38] <Loetmichel> Tom_itx: that depends ;-)
[11:04:52] <IchGuckLive> in EU 5mW is max
[11:05:06] <IchGuckLive> if you go above Jail is near
[11:05:14] <IchGuckLive> O.O B)
[11:06:07] <Loetmichel> http://www.aliexpress.com/item/Free-shipping-2014-newest-High-power-10000mw-laser-pointer-flashlight-mantianxing-green-pen-laser-light/1362813181.html
[11:06:12] <Loetmichel> that could do the trick ;-)
[11:06:18] <Tom_itx> what do laserjets use?
[11:06:29] <Loetmichel> Tom_itx: depends
[11:06:43] <Loetmichel> the old laserjet 4 use a 100mW IR diode
[11:06:56] <Loetmichel> some modern ones use a bigger one because of higher speed
[11:07:14] <Loetmichel> but its always IR
[11:08:29] <IchGuckLive> the redy made Router including all componets is 500Eur so its only fun and therfore to stay as cheep as you can
[11:09:23] <jmasseo> toner is heat curing right
[11:09:30] <Tom_itx> yes
[11:09:35] <jmasseo> i was confused there for a second
[11:09:45] <jmasseo> conflated 'IR' with 'UV curing ink'
[11:10:23] <Tom_itx> http://lifehacker.com/287252/turn-a-flashlight-into-a-handheld-burning-laser
[11:11:40] <IchGuckLive> http://www.ebay.de/itm/HIGH-PRECISE-SPEED-CO2-LASER-ENGRAVER-ENGRAVING-CUTTING-MACHINE-Gravurmaschine-/151162253706?pt=LH_DefaultDomain_77&hash=item2331f8f18a
[11:12:48] <IchGuckLive> he also got nice small routers
[11:12:56] <IchGuckLive> im off bye till later
[11:13:15] <Loetmichel> jmasseo: the decharging of the optical drum works best with IR, though
[11:19:22] <Tom_itx> ok maybe the one i did this project with would work: http://tom-itx.dyndns.org:81/~webpage/mtkflash/flash_howto_index.php
[12:07:12] <JT-Shop> nap time!
[12:20:30] <Tom_itx> lunch first
[12:21:27] <Tom_itx> wb andypugh
[12:21:38] <andypugh> Hi chaps
[12:24:59] <IchGuckLive> hi all B)
[12:26:17] <IchGuckLive> hi owhite is there snow at your place ;-)
[12:26:45] <owhite> i'm in baltimore. We had some this morning. And some already on the ground.
[12:27:16] <CaptHindsight> IchGuckLive: you might have just overheated your bluray laser diode
[12:27:30] <IchGuckLive> im in germany we had also some but only for 2hr tonigt then it warmed up again to 6′C
[12:27:30] <owhite> hi people gladevcp doesnt seem to catch when I Ctrl-c out of gmoccapy very well. Any suggestions ?
[12:27:59] <IchGuckLive> CaptHindsight: i will tr again but normaly they are gone forever
[12:28:18] <CaptHindsight> overheated is why it's dead
[12:28:31] <owhite> ichgucklive I've only been in your country in the spring and summer - amazing weather.
[12:28:32] <CaptHindsight> not that it got too hot and will work after it cools down
[12:28:58] <owhite> are there any gmoccapy coders on line today?
[12:29:12] <IchGuckLive> yes the startup power is wy to high it needs about 30sec belo 20mA to function propper if you go ahead with 2780ma its gione
[12:29:22] <CaptHindsight> IchGuckLive: you might want to monitor the temp of the diode and add some thermal management such as a heat sink or forced air
[12:29:53] <IchGuckLive> ill do
[12:30:42] <CaptHindsight> but since cheap is the main goal when designing a bluray/DVD burner they don't design for max power at 100% duty cycle for long periods
[12:31:13] <CaptHindsight> but they are low cost, especially used ones
[12:35:01] <CaptHindsight> IchGuckLive: http://www.ebay.com/itm/445nm-Blue-2-Watt-Laser-Diode-Replacement-Casio-XJ-m140-With-Lens-ESD-Packaging-/111111574395?pt=LH_DefaultDomain_0&hash=item19dec4137b
[12:35:29] <CaptHindsight> you might want to use one of these instead of the 405nm
[12:36:21] <IchGuckLive> im on a 6235nm
[12:36:25] <CaptHindsight> only $35ea 2W and take a look at its work http://www.youtube.com/watch?v=gF4HG6v29UY
[12:36:26] <IchGuckLive> 635
[12:38:39] <CaptHindsight> if can get IR for cheap it's more efficient than visible spectrum for marking/cutting
[12:39:28] <Tom_itx> IchGuckLive, i pulled the laser leftover from this project: http://tom-itx.dyndns.org:81/~webpage/mtkflash/flash_howto_index.php
[12:39:41] <Tom_itx> gotta dig down to find the led now
[12:40:03] <Tom_itx> it may not be one that will work
[12:41:56] <IchGuckLive> CaptHindsight: but you need 24 of the diodes to do the cut
[12:42:02] <IchGuckLive> so ot cheep
[12:42:24] <IchGuckLive> i got 35DVD burners for 50EUr
[12:42:34] <heathmanc> Hey Tom_itx, just to let you know, just used your guide to make a bitfile for a 4i65, worked great. Thanks!
[12:42:39] <CaptHindsight> you can buy ~800nm laser diodes for ~$35ea 1-2W
[12:43:06] <Tom_itx> heathmanc, no issues i need to add?
[12:43:25] <CaptHindsight> IchGuckLive: the casio uses a 2W diode at 455nm, you can use just one for cutting, the video just shows what it can do if you use all of them
[12:43:27] <heathmanc> just the pawn shop symbol thing.. Had me confused for a minute
[12:43:46] <heathmanc> But it was just me
[12:44:12] <heathmanc> used it to make a bitfile for a 7i48, worked perfectly first go round
[12:45:24] <CaptHindsight> http://www.ebay.com/itm/261278698233 http://www.ebay.com/itm/120921972102 with a nice big TO3 case
[12:45:49] <owhite> Answering my own question for archiving purposes, excuse the spam. Catching ctrl-C events in gladevcp is discussed here: http://linuxcnc.org/docs/html/gui/gladevcp.html see, on_unix_signal.
[12:46:29] <CaptHindsight> http://www.ebay.com/itm/110887865632 INDUSTRIAL-TO3-Package-3000mW-3W-808nm-810nm
[12:46:45] <CaptHindsight> 3 w for only $65
[12:46:58] <heathmanc> what is it capable of?
[12:47:50] <CaptHindsight> heathmanc: similar to this http://www.youtube.com/watch?v=gF4HG6v29UY
[12:48:06] <CaptHindsight> it depends on how it's focused as well
[12:48:24] <owhite> hey so has anyone used a touchscreen with linuxcnc?
[12:48:49] <IchGuckLive> owhite: some lathe users yes
[12:49:31] <IchGuckLive> owhite: its better to use a ofset matrix you can control
[12:49:35] <CaptHindsight> 2W is just output, 2w per sq cm won't do much, 2w per sq mm will burn lots, 2w per sq um will melt tungsten
[12:49:39] <owhite> do you have suggestions for what kind of things to watch out for, with respect to buying a touchscreen? Like, I'm wondering if all of them work with ubuntu, or is it a subset?
[12:50:09] <andypugh> I have a touchscreen on my milling machine, using the "TouchY interface and it is working well.
[12:50:35] <CaptHindsight> owhite: anything that works with ubuntu
[12:51:23] <heathmanc> stick with something made by ELO
[12:51:30] <heathmanc> widely supported in ubuntu
[12:51:51] <owhite> do you guys think it's possible to run two screens, one a touchscreen running an linuxcnc interface, the other with a "traditional ubuntu desktop"?
[12:52:10] <andypugh> I can't see any reason why not. Nor can I see why you would bother.
[12:52:48] <CaptHindsight> http://www.ebay.com/itm/120972149839 5W-808nm-IR-Laser-Diode-Cmount-Laser-w-h-TO3-Sealed-FAC-Lens-built-in
[12:52:50] <owhite> andypugh: so I'm thinking the touch screen would be relatively small, and near my machine, the other would be up on the wall.
[12:53:03] <owhite> heathmanc: thanks - I'm looking at them now.
[12:53:28] <heathmanc> would like to find something to do simple engraving with
[12:53:34] <IchGuckLive> CaptHindsight: if you order those in Germany you will not get them
[12:53:43] <andypugh> That ought to work. But be careful what you control with the touchscreen, you don't want accidental touches to cause machine movement.
[12:53:57] <CaptHindsight> IchGuckLive: do they require a special license?
[12:54:51] <owhite> >forehead smack< andy, thanks. good advice.
[12:55:26] <CaptHindsight> IchGuckLive: whatever diode you decide to use for continuous use at 100% duty cycle, keep it cool <60C at the case or lower, it will last years
[12:56:31] <CaptHindsight> andypugh: back from the slopes?
[12:57:08] <andypugh> Yes, unfortunately
[12:57:09] <CaptHindsight> andypugh: did you manage a working kernel and EMC on the Udoo before you left?
[12:57:30] <andypugh> Kernel yes, Xenomai tests, yes. LinuxCNC not quite.
[12:57:43] <owhite> damn - ebay just got smarter - they have dropdown menus to search for things like screen size.
[12:58:46] <CaptHindsight> same for the Cubioeboard, we stopped trying to patch things up and decided to just build everything correctly from scratch, the Linux images all have broken distros and packages
[12:59:15] <andypugh> brb, no milk/food/beer in the house.
[13:00:14] <owhite> grab me a sandwich.
[13:00:28] <CaptHindsight> sammich? :)
[13:02:42] <CaptHindsight> http://www.automationtechnologiesinc.com/products-page/laser-engraving/40w-co2-laser-machine-software-training is the spot dia actually 25um or is the resolution just BS?
[13:20:18] <IchGuckLive> CaptHindsight: in germany there is big trouble with lasers so max 5mW is alowed or you sign up for Lasersafty at VBG and you got a licend laser man with all the hints of safty
[13:20:48] <IchGuckLive> hi ekolojik welcome to the channel if a question just ask
[13:22:52] <CaptHindsight> IchGuckLive: can anyone purchase a complete laser cutter with >5mW laser inside without a license?
[13:23:55] <IchGuckLive> if you buy it inside yes but outside Germany the coustum service will make you a big bill and you might get in big trouble with the law an forcement
[13:24:15] <CaptHindsight> interesting
[13:25:15] <CaptHindsight> we get asked for the most amount of info most often from German customs than any other country, France is #2
[13:25:32] <IchGuckLive> somthing like egyp tahier woudent you see in germany 100 of the >5mW laserbeams in privat hands
[13:26:00] <IchGuckLive> Safty is a big issue here
[13:26:34] <IchGuckLive> laserfreek metings are controled at the entry to the laserpowersafty
[13:27:18] <IchGuckLive> http://www.youtube.com/results?search_query=laserfreak&sm=3
[13:29:16] <CaptHindsight> no safety guards on machines, and no laser license required in China, but we need certification to ship any fluids or powdered chemicals
[13:29:53] <IchGuckLive> china is growing and they will shure have rules soon
[13:30:15] <IchGuckLive> ok im off BYE
[13:34:30] <CaptHindsight> http://www.nilno.com/cgi-bin/optics.cgi
[13:49:18] <eric_unterhausen> been a while since firefox went nuts and used 150% of cpu
[14:02:45] <paul___> Hallo zusammen, kennt sich jemand mit dem stepconf-wizard aus? läßt sich nicht starten bringt Fehlermeldung, kenne mich nicht aus
[15:17:27] <owhite> hi people. I know this is a vague question but does anyone have any guess why the pwm_frequency pin will not stay set once everything gets loaded and the axis interface is up? I set it in my hal file but that it doesnt seem to get set. Running $ halcmd setp hm2_5i20.0.pwmgen.pwm_frequency 40000 after axis loads up seems to take.
[16:31:06] <MrSunshine> gah i need cutting data for router bits in plywood .. :/
[16:45:10] <Tom_itx> MrSunshine, try that one on for size: http://www.onsrud.com/plusdocs/Doc/index.html?model.code=FeedSpeeds
[16:58:45] <Deejay> gn8
[16:59:16] <MrSunshine> Tom_itx, thanks .. kinda pita that i need to translate everything to metric tho :P
[17:05:13] <cradek> today: high 53, low 0
[17:05:54] <Tom_itx> mid 60's here
[17:08:54] <Tom_itx> can't find a phillips small enough to get this darn laser apart
[17:25:25] <skunkworks> 15f here - supposed to drop to -21
[17:25:34] <skunkworks> very very windy
[17:25:48] <Tom_itx> feel free to keep it
[17:26:41] <skunkworks> sorry tomorrow only - 14 tueday -21
[18:39:23] <jmasseo> i have a very basic question
[18:39:35] <jmasseo> where do you use the specific types of end mills? flat nose, center cut, ball nose, bull nose?
[18:39:48] <jmasseo> and how do you know how many fluts for what material?
[18:40:00] <zeeshan> theres a few rule of thumbers
[18:40:20] <Loetmichel> the form depends on the cut needed, obviously
[18:40:33] <zeeshan> like you don't plunge straight down with anything more than a 2 flute end mill
[18:40:35] <Loetmichel> the number of flutes depends on the material
[18:40:44] <zeeshan> if you're going at angles you can use more than 2 flutes
[18:40:45] <Loetmichel> in gernal: hatder material: more flutes
[18:40:55] <Loetmichel> general, harder
[18:41:18] <jmasseo> so wax - 2 flutes, steel - 4 flutes?
[18:41:42] <Loetmichel> acrylics and PVC and such: 1 flute
[18:41:52] <jmasseo> ah
[18:42:03] <jmasseo> i saw some wax milling tools that looked like double-edged scalpels
[18:42:05] <Loetmichel> aluminium and copper: 2 flute with polished flutes
[18:42:20] <Loetmichel> steel/hardend steel: 4 flutes
[18:42:45] <zeeshan> jmasseo: http://www.micro-machine-shop.com/end_mill_nomenclature.pdf
[18:42:54] <zeeshan> good referenc from enco
[18:42:55] <Loetmichel> and glass fibre/carbon fibre plastics: spiral or diamond teeth
[18:44:15] <jmasseo> 'bull nose' is not on there.
[18:44:46] <zeeshan> ball nose is generally used to do contoured shapes.
[18:45:59] <toastyde1th> there is an actual reason for using a specific number of flutes, and that is machine power vs feed rate
[18:46:22] <toastyde1th> with steel you can't really feed heavily, and your chip load tends to be .002-.005 per tooth
[18:46:33] <toastyde1th> any more than that and you break your tool from side pressure
[18:46:50] <toastyde1th> so the number of flutes goes up so that the side pressure is kept down but you can use a higher feed rate with the same chip load
[18:47:40] <toastyde1th> ideally, you want as large a chip load as possible because the energy required to remove a volume of material goes down
[18:47:58] <toastyde1th> in things like aluminum, it's much easier to get a very high chip load
[18:48:11] <jmasseo> so you use the bigger flutes?
[18:48:11] <toastyde1th> .020" per tooth on a 1" tool, for example
[18:48:28] <toastyde1th> so you use fewer flutes, and that also has the benefit of having a lot of gullet clearance
[18:48:35] <toastyde1th> beacuse the chips take up a lot more space
[18:49:06] <toastyde1th> big ass tools like facemills in a very powerful mill can take enormous chip loads
[18:49:14] <toastyde1th> like .050" per tooth
[18:49:22] <toastyde1th> and they wind up looking like lathe chips
[18:49:48] <toastyde1th> the polished flutes only help if you are spinning the tool fast as balls
[18:50:20] <jmasseo> speeds and feeds another thing i've been trying to understand.
[18:50:37] <toastyde1th> what questions do you have
[18:50:38] <jmasseo> you cut steel at low speeds, but aluminum at high speeds
[18:50:41] <toastyde1th> ya
[18:50:42] <jmasseo> because steel is hard
[18:50:45] <toastyde1th> negative
[18:50:48] <jmasseo> and you have the shaller cuts?
[18:50:53] <toastyde1th> because the specific energy required to shear steel is high
[18:50:59] <toastyde1th> and that energy becomes heat
[18:51:00] <Loetmichel> toastyde1th: the polished flutes are a must if you are milling 99,99% copper or similar "smeary" stuff
[18:51:13] <toastyde1th> not my experience at all, Loetmichel
[18:51:49] <Loetmichel> or else use insane amounts of cooling fluid to get rid of the swarf
[18:51:59] <Loetmichel> wothout baking it to the mill bit
[18:52:17] <toastyde1th> regardless, the energy required to cut steel is why it has to be cut slower
[18:52:42] <toastyde1th> and I don't know what you're doing wrong, but I've never had a surface finish problem in pure copper using boring ass tools
[18:52:50] <toastyde1th> boring-ass, rather
[18:53:11] <toastyde1th> the temperature of the tool is what controls wear
[18:53:24] <toastyde1th> the hotter the tool is, the faster it wears - provided everything else is constant
[18:54:28] <jmasseo> do tools heat up faster on hardened steel?
[18:54:28] <toastyde1th> and something like 95% of the machine power goes into heat, rather than lattice distortion (physical deformations of the metal)
[18:54:53] <toastyde1th> no, but the harder material is more abrasive to the tool
[18:55:17] <toastyde1th> and so it already causes more wear, so you have to keep the tool even colder than normal
[18:55:43] <jmasseo> so coolant lets you go faster?
[18:55:51] <toastyde1th> for a variety of reasons, yes
[18:56:03] <jmasseo> i fucking hated oiling on manual machines
[18:56:06] <jmasseo> cutter oil
[18:56:08] <jmasseo> tap oil
[18:56:19] <toastyde1th> it keeps pressure welding down
[18:56:27] <toastyde1th> it also reduces friction in the cut
[18:56:32] <jmasseo> covered in volatile hydrocarbons after an hour
[18:56:36] <toastyde1th> as the material springs back around the tool
[18:57:18] <jmasseo> the nice enclosed vmc is a lot nicer. :)
[18:57:53] <toastyde1th> def
[18:58:06] <jmasseo> still have to be careful not to jack up your workpiece if you get too hot
[18:58:12] <toastyde1th> the massive flood coolant in a vmc also helps with dimensional stability
[18:59:51] <toastyde1th> one of the tricks we use to go from billet to a finished part is to have distinct roughing stages, so that if I'm making 50 parts out of 10" square stainless blocks
[19:00:03] <toastyde1th> we'll rough the thing down to .100" over or something like that
[19:00:16] <toastyde1th> that way it cools down between each operation
[19:04:28] <zeeshan> are you doing this in a temperature controlled environemnt? :D
[19:04:46] <Tom_itx> tapping fluid is wonderful stuff
[19:05:10] <zeeshan> note: don't use tapping fluid as bandsaw coolantr
[19:05:15] <zeeshan> that shit solidifies!
[19:05:16] <zeeshan> :]
[19:05:21] <Tom_itx> no probably not
[19:05:31] <zeeshan> it gums up the chips
[19:05:36] <Tom_itx> but it's heaven't honey for what it was made for
[19:05:45] <zeeshan> and makes them into big chip balls that are hard to dislodge
[19:07:43] <toastyde1th> usually you don't cut down stock to rough shape in a controlled environment because I don't like putting a 500 degree block of steel next to my gage blocks
[19:08:35] <toastyde1th> plus you can eat up .002" of tolerance pretty easily with temperature fluctuations
[19:09:26] <Tom_itx> your gage blocks should be in a room by themselves
[19:09:33] <Tom_itx> and other test equipment
[19:10:11] <toastyde1th> for those of us with a master set of gage blocks, they are in a room by themselves
[19:10:50] <toastyde1th> that doesn't change the fact you're still going to wind up with a nice big raise bump on your surface plate, hot tools, and your climate control going apeshit trying to deal with that much energy in the room all of a sudden
[19:11:34] <toastyde1th> it's bad even in a non-climate controlled area
[19:12:47] <Tom_itx> let it cool first
[19:13:02] <toastyde1th> duh
[19:14:06] <Tom_itx> (i don't need a master set for my sherline and hobbies)
[19:16:27] <toastyde1th> in other news, I am off to a fucking horrifying start in woodworking
[19:17:06] <Tom_itx> what's your wood project?
[19:18:06] <toastyde1th> workbench
[19:18:24] <toastyde1th> doing the hand tools route
[19:19:53] <Tom_itx> we had a set of round and rectangular at the shop
[19:20:11] <Tom_itx> along with other stuff like plug gages
[19:45:27] <owhite> hey people. Does anyone know where I can find the documentation for making hal calls in python? Are there docs for modules/classes when I use "import hal"?
[20:09:36] <Tom_itx> maybe look at some of JT-Shop's python stuff
[20:12:20] <Tom_itx> http://gnipsel.com/glade/index.html
[20:12:24] <Tom_itx> or maybe http://gnipsel.com/linuxcnc/gui/index.html
[20:47:49] <owhite> tom_itx: well I'm not looking for the gladevcp stuff, I'm just after understanding stuff like: hal_glib.GPin(halcomp.newpin("laser_hertz_value", hal.HAL_U32, hal.HAL_OUT))
[20:48:44] <Tom_itx> yeah i know but i thought it may be a place to start
[20:48:47] <owhite> the halcomp.newpin in particular.
[20:48:49] <owhite> ok.
[20:49:07] <Tom_itx> i thought he did a limited front end there somewhere
[21:18:20] <eric_unterhausen> why are the drivers for national instruments a 3 hour download?
[21:18:59] <Tom_itx> maybe they have a slow server
[21:19:09] <eric_unterhausen> well, it was 1.3 gig
[21:19:30] <eric_unterhausen> fortunately I had 3 hours of work I could do on a Sunday