#emc | Logs for 2011-03-18

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[02:12:16] <atmega> http://www.redhillnetworks.com/products/webcontrol/webcontrol-faq.html
[02:12:25] <atmega> nifty looking for $35
[02:16:19] <mozmck> not bad!
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[04:55:15] <Jymmmm> atmega: where do you see $35?
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[12:25:51] <anonimasu> does anyone have a idea how to figure out what kind of resistors I need for a plasma thc?
[12:27:40] <awallin> do you have a circuit schematic ?
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[12:29:23] <anonimasu> thanks for the mail!
[12:29:34] <anonimasu> I meant to respond but I completely forgot
[12:29:56] <anonimasu> I bought the mesa thc board
[12:30:15] <awallin> right. did you get them delivered OK?
[12:30:19] <anonimasu> yes I did
[12:30:26] <awallin> ok, good.
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[12:30:52] <anonimasu> the question is just what kind of external resistors I need for my plasma, 100v arc voltage but other then that I have no clue(how high the hf ignition goes)
[12:32:48] <awallin> oh, I haven't worked with plasma or welding electronics so I don't know...
[12:33:13] <awallin> we should get a new and better manual mill with DRO to work soon. hopefully I can finish the lathe project then!
[12:33:24] <anonimasu> I have a lathe project going on now
[12:33:38] <anonimasu> I saw you bought a lathe from someone on some cnczone thread a long while ago
[12:34:02] <awallin> yes, that one. been slowly doing things on it but no major progress
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[14:26:02] <alex_joni> anonimasu: what's the THC input voltages?
[14:27:03] <TekniQue> is this channel full of stoners too?
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[14:52:23] <eik0> TekniQue: no, anonimasu is one of a kind stoner
[14:52:25] <eik0> :)
[15:09:22] <awallin> no torch height control in here: http://en.wikipedia.org/wiki/THC_%28disambiguation%29
[15:18:39] <DaViruz> why is torch height control desired?
[15:19:13] <DaViruz> (tha't a sincere question)
[15:19:53] <TekniQue> for cutting materials of different thicknesses mostly
[15:20:43] <alex_joni> DaViruz: for cutting materials that aren't plane mostly
[15:20:49] <alex_joni> if it's thin sheets they can warp
[15:21:12] <DaViruz> i see
[15:21:41] <DaViruz> can't that be acomplished with a floating head like in an engraver?
[15:21:51] <DaViruz> perhaps the risk of snag is too high
[15:25:35] <alex_joni> in theory yes, but the problem is you have parts that sit on a grill, or spikes (so you don't damage the table while cutting)
[15:25:52] <alex_joni> so you sometimes get parts that fall down (holes), so a floating head can get stuck
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[15:29:36] <DaViruz> http://www.youtube.com/watch?v=txGP-Qbii2E
[15:29:39] <DaViruz> that is pretty neat
[15:30:00] <DaViruz> but i think i'll settle for a fixed head on my table
[15:34:00] <anonimasu> alex_joni: it's 130v
[15:34:49] <anonimasu> alex_joni: however I have no idea about the hf start
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[15:35:38] <anonimasu> DaViruz: it dosent work so great without a thc, or floating head(I tried) specially not plasma
[15:35:52] <JT-Shop> that's pretty neat, I wonder if mine can do that
[15:35:53] <DaViruz> my plasma cutter has an ordinary automotive ignition coil in it for the arc start
[15:36:12] <anonimasu> I ordered a card from mesa to handle that, it gives frequecy output depending on arc voltage
[15:36:13] <DaViruz> pretty old thing though
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[15:50:28] <JT-Shop> anonimasu: do you have any photos of your table?
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[16:14:44] <anonimasu> no, im gonna cut a proper one when I get the plasma working
[16:15:24] <anonimasu> it's a T configuration so I can fold it up to save space
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[16:25:34] <JT-Shop> cool
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[17:15:41] <adb> found interesting micro cnc off about 15-20 cm , any idea how much may cost to manufacture one as in redalyc.uaemex.mx/pdf/474/47420108.pdf ?
[17:18:14] <skunkworks> http://www.cnczone.com/forums/emc_linux_enhanced_machine_control/124285-thunk_during_reversal_z-axis.html
[17:19:23] <awallin> adb: that looks like it could cost 20-30k (or more...)
[17:20:29] <adb> awallin, i see ,tks
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[22:00:34] <JT-Shop> one more board done :) and I have a plan now
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[22:09:06] <atom1> do tell
[22:10:11] <JT-Shop> just figuring out how to disconnect the panel on the garage side of the wall and put one on the shop side then reconnect the one on the garage side
[22:10:39] <atom1> mains?
[22:10:40] <JT-Shop> a 6x6x4 surface mount box will allow me to route my wires from panel to panel
[22:10:43] <JT-Shop> yea
[22:11:33] <JT-Shop> kept trying to figure it out using LB's and connectors but it didn't look pretty
[22:11:43] <atom1> does it have a breaker from the house feeding it or does it feed from the main?
[22:12:11] <JT-Shop> I have a 200amp main at the meter that feeds both the shop and the garage
[22:13:01] <andypugh> Sounds a bit feeble, considering your puny voltage :-)
[22:13:13] <JT-Shop> LOL I ran the garage off of a 10-2 underground for years
[22:13:36] <atom1> 100A is common in the US
[22:13:44] <atom1> 200A on larger or newer homes
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[22:13:56] <atom1> old ones had 60A service
[22:13:57] <JT-Shop> then I upped the ante with a 8-4 SO cord
[22:14:10] <atom1> and screw in fuses
[22:14:29] <JT-Shop> them are real old homes
[22:14:36] <atom1> the 200A main breaker is before the pannels?
[22:14:45] <atom1> yup
[22:15:47] <atom1> just load balance the 2 strips
[22:16:27] <JT-Shop> a 200A is the smallest meter you can get for a house around here
[22:16:28] <JT-Shop> some of the old homes around here had/have the old push button breakers that came out in the 60's
[22:16:28] <JT-Shop> yea I know how
[22:16:30] <JT-Shop> been an electrician before
[22:18:04] <JT-Shop> andypugh: I could put a 240v to 480v transformer on each end to boost the pressure
[22:18:21] <danimal_garage> http://www.homebrewedcomponents.com/wiredbig.jpg
[22:18:33] <danimal_garage> my article in Wired Magazine came out today
[22:18:36] <JT-Shop> evening Dan
[22:18:40] <danimal_garage> hi John
[22:18:55] <danimal_garage> how goes it?
[22:20:20] <JT-Shop> ah ok, I'm up to wiring up the shop so some decisions have to be made for the 240v plug locations etc
[22:20:39] <danimal_garage> ahh
[22:20:41] <JT-Shop> Dan is that you?
[22:20:45] <danimal_garage> yes
[22:20:47] <atom1> what is 240v?
[22:20:59] <atom1> compressor, welder a few machines
[22:21:40] <JT-Shop> yea welders and the feed for the phase converters for the 3-phase machines
[22:21:54] <JT-Shop> I think the compressor will stay in the garage
[22:21:55] <danimal_garage> you can never have enough electrical hookups.
[22:22:05] <atom1> how many run off the phase converter?
[22:22:13] <JT-Shop> no the walls and ceiling will be lined with 120v
[22:22:35] <andypugh> danimal_garage: Nice article. Can't help feeling that one of those metal-cutting radial-arm saws would speed things up for you, if you are using a bandsaw.
[22:22:39] <JT-Shop> 2 atm are 3-phase 3 when I move the Samson over here
[22:22:57] <atom1> ever have trouble with them and the cnc stuff?
[22:23:06] <JT-Shop> nope
[22:23:12] <atom1> we had one that didn't like running off the phase inverter
[22:23:25] <atom1> it was a little Fadal
[22:23:41] <JT-Shop> usually if you put the 120v part of the machine on the mains and not the generated leg your ok
[22:23:55] <danimal_garage> andypugh, i have one, however i can zip through 100 chainrings worth of material on the bandsaw in about 30 minutes
[22:24:18] <danimal_garage> i just stack a bunch of the sheets and away it goes
[22:24:22] <JT-Shop> Dan are you using a carbide tipped blade on your band saw?
[22:24:26] <danimal_garage> no
[22:24:37] <danimal_garage> i cant find them in that size
[22:24:50] <JT-Shop> them puppies flat make some curls when cutting but no thin stuff
[22:25:00] <atom1> do they make them in carbide grit blades?
[22:25:15] <JT-Shop> what size is your blade
[22:25:20] <andypugh> danimal_garage: Actually, maybe one of these, and attack the full-size sheets?
[22:25:21] <andypugh> http://www.screwfix.com/prods/68248/Power-Tools/Circular-Saws/Evolution-Rage-1-230mm-Circular-Saw-110V
[22:25:31] <danimal_garage> JT-Shop, i really only need it for the 4" diameter stainless steel bar stock i normally cut
[22:25:58] <danimal_garage> i can run 9'6" to 9'10" blades, 3/4"
[22:26:04] <JT-Shop> it would be perfect for that... for me it cuts twice as fast on solid stock
[22:26:12] <danimal_garage> nice
[22:26:35] <andypugh> That one claims to collect the swarf, which would be nice, because when I used my (normal) one to cut a 6" x 1" ali bar, it filled my underwear with chips...
[22:26:37] <danimal_garage> i use lennox bi metal blades, 4/6 pitch
[22:26:54] <JT-Shop> I use them too
[22:27:18] <atom1> or a chop saw
[22:27:43] <danimal_garage> chop saws are too loud
[22:27:50] <JT-Shop> http://www.bandsawbladesdirect.com/product_info.php/cPath/21_24/products_id/29?osCsid=ecd179f40d231281c168db8aab430cf5
[22:27:58] <danimal_garage> residential area :(
[22:28:00] <JT-Shop> Dan, they have them to fit your saw
[22:28:08] <danimal_garage> sweet!
[22:28:12] <danimal_garage> Thanks John
[22:28:34] <danimal_garage> i wonder how long they'd last
[22:28:39] <andypugh> Perhaps we should stop trying to spend Dan's cash?
[22:28:40] <danimal_garage> compared to bi metal
[22:28:44] <JT-Shop> looks like the 3/4 only has one tooth choice
[22:28:50] <atom1> probably pretty good unless you chipped a tooth
[22:29:15] <danimal_garage> probably better than 4/6 for that big of a diameter of stock
[22:29:36] <atom1> use the bimetal for thin stuff
[22:30:59] <JT-Shop> you gotta run the bandsaw at the slowest speed with them
[22:30:59] <JT-Shop> I've only wrecked one trying to saw thin stuff the second one has been on the saw for 6 months or better
[22:30:59] <JT-Shop> so now I know better and put the bimetal on for thin sections
[22:31:00] <JT-Shop> the thing that amazed me was it cut curls not little tiny chips
[22:31:09] <danimal_garage> ouch, $180
[22:31:23] <danimal_garage> it would have to last a long time for that price
[22:31:29] <JT-Shop> yep
[22:31:31] <atom1> heh
[22:31:34] <atom1> take care of it
[22:32:02] <danimal_garage> john, what kind of saw do you have?
[22:32:08] <danimal_garage> a small one like mine?
[22:32:40] <JT-Shop> Wilton, 1" blade nice saw
[22:33:33] <danimal_garage> ah so it's probably quite a bit more rigid than mine
[22:33:35] <JT-Shop> 8x13 cap.
[22:33:53] <danimal_garage> ah mine's 8x14 i think
[22:34:00] <JT-Shop> oh it is the best thing I ever bought since I had the little band saw
[22:34:14] <danimal_garage> what kind of feed control?
[22:34:23] <danimal_garage> hydro cyl?
[22:34:24] <JT-Shop> the 1" blade is the key, hyd feed
[22:34:48] <danimal_garage> i probably could run a 1" blade
[22:34:50] <JT-Shop> cuts so straight for fabrication I cut to size
[22:36:02] <danimal_garage> what length is your blade?
[22:36:26] <danimal_garage> I have enough clearance for a 1"
[22:36:36] <JT-Shop> 114.5"
[22:37:15] <danimal_garage> ah same as mine more or less
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[22:37:29] <danimal_garage> wonder if i should try a 1"
[22:37:46] <JT-Shop> is your saw rated to take a 1" blade?
[22:37:53] <danimal_garage> i have no clue
[22:37:59] <danimal_garage> it's an old carolina saw
[22:38:08] <JT-Shop> they are a bit thicker than the 3/4" blades
[22:39:41] <danimal_garage> http://compare.ebay.com/like/120354024477?ltyp=AllFixedPriceItemTypes&var=sbar&rvr_id=218985536808&crlp=1_263602_304662&UA=%3F*I7&GUID=aca60fb512e0a04373922f62ffc46a28&itemid=120354024477&ff4=263602_304662
[22:39:42] <JT-Shop> if the pulleys are about 7/8" it might be a 1" blade saw
[22:40:27] <fragalot> Jymmmm: http://www.youtube.com/watch?v=exk6dwxAUGg <= my uni project finally works.. not the optimal set of instructions in it, but they worked. xD (test coordinates)
[22:40:40] <danimal_garage> the pulleys have about a 5/8 step for the blade
[22:41:01] <JT-Shop> that would be 3/4" then
[22:41:09] <danimal_garage> i know it's supposed to have a 3/4" blade, but a 1" should clear everything
[22:41:28] <danimal_garage> i wonder if the blad would pop off too much
[22:41:36] <atom1> you don't wanna get a $$ blade and screw it up
[22:42:00] <danimal_garage> yea
[22:42:08] <atom1> i'd experiment with a wider bi metal
[22:42:24] <danimal_garage> i wider blad wouldnt be an issue, it's got adjustments for that
[22:42:35] <danimal_garage> wow my typing sucks today
[22:43:06] <JT-Shop> looks like a pretty good bandsaw
[22:43:34] <danimal_garage> ehh, better than a harbor freight i guess
[22:43:46] <atom1> oh it's horizontal
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[22:44:30] <JT-Shop> I'd be concerned about blade tracking using a 1" blade on 3/4" pulleys
[22:44:32] <danimal_garage> iron pulleys, boston gear gearbox
[22:44:44] <atom1> JT-Shop, same here
[22:44:52] <danimal_garage> JT-Shop, i could machine the pulleys
[22:45:18] <JT-Shop> then your cool blocks are too short too so...
[22:45:43] <atom1> i wonder if i can pull a couple transformers from an old amp and use them for a psu for my stepper drivers
[22:45:46] <danimal_garage> the actual pulleys are 1.25" thick, the step is only half of the width right now
[22:46:20] <danimal_garage> JT-Shop, yea, that's the only issue, however i could move the upper guide bearings up higher
[22:46:23] <JT-Shop> I wonder if they made two different models and used the same casting for both
[22:46:50] <JT-Shop> I don't think it would be worth the effort to change it over
[22:47:08] <atom1> price a set of pulleys. that may be prohibitive though
[22:47:19] <danimal_garage> i put a hydra-check piston on there for feed control, it's VERY smooth
[22:48:02] <danimal_garage> atom1, i'd just machine the existing ones. I can slap them in the mill and have them done in a matter of 30 minutes
[22:48:09] <JT-Shop> time to take the wife to dinner at Hydes :)
[22:48:22] <atom1> pizza here
[22:48:25] <danimal_garage> have a good one John, thanks for the blade link
[22:48:25] <atom1> bak later
[22:48:30] <danimal_garage> adios
[22:48:36] <JT-Shop> Dan, cool write up
[22:48:42] <danimal_garage> thanks!
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[23:19:07] <atom1> danimal_garage, yeah that's cool. just found and read it
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[23:30:38] <andypugh> danimal_garage: Shouldn't you be saying how terribly skilled it is, and that they would be far better buying from you?
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[23:39:47] <danimal_garage> andypugh, i suppose, but that wouldn't have made it into the article
[23:39:59] <danimal_garage> atom1, thanks!
[23:40:06] <andypugh> Ah, very sly!
[23:40:33] <danimal_garage> andypugh, the odds of someone doing is rather slim
[23:40:45] <danimal_garage> all it is for me is free advertising
[23:41:49] <andypugh> A fair percentage of people I know have made their own sprockets. Maybe half a dozen, therefore I conclude that about 10% of the world's population are sprocket-makers (and at least half have CNC machines)
[23:43:44] <danimal_garage> haha
[23:44:51] <danimal_garage> well fortunately i have a pretty solid following and anyone who has tried copying me has been shot down pretty quickly
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