#linuxcnc | Logs for 2015-05-21

[01:23:26] <MattyMatt> Valen, "3 phase servo motor" search term
[01:31:00] <MattyMatt> http://www.ebay.com.au/sch/i.html?_from=R40&_sacat=0&_nkw=3+phase+servo+motor&rt=nc&LH_Auction=1
[01:31:20] <MattyMatt> doesn't work so great on ebay.au tho
[01:33:45] <MattyMatt> so, why can't you use an induction motor as a servo? is it just the behaviour at close to 0Hz that's different?
[01:36:56] <Jymmm> Tom_itx: Was it you looking for temp sensors?
[01:37:29] <Jymmm> Tom_itx: http://www.amazon.com/Vktech-DS18b20-Waterproof-Temperature-Transmitter/dp/B00CHEZ250/
[01:40:44] <Jymmm> Tom_itx: you can connect them in a master/slave(s) configuration on a single bus
[01:45:34] <Jymmm> Tom_itx: http://www.maximintegrated.com/en/products/analog/sensors-and-sensor-interface/DS1822.html/tb_tab2#tab2
[01:57:05] <MrSunshine> hmm checking a round shaft for straightness is one thing, how to check a rectangular or square tube for straightness ?
[01:57:25] <MrSunshine> ofc, using a surface guage one could just flip it over and check the sides against eachotehr but
[01:57:33] <MrSunshine> maybe a machinist level to run over it ?
[01:57:35] <archivist> a straight edge, or a level
[01:58:56] <MrSunshine> but a straight edge .. how do you know that one is realy straight? :P
[01:59:11] <Crom> sighting sticks or parallels, look over them to see if you have twist. straight edge for flatness
[01:59:26] <MrSunshine> hell .. if its long it just needs a little bang to bend quite thick and stirdy stuff
[01:59:43] <MrSunshine> Crom: could use the level for twist also
[02:00:23] <Crom> true, but not my levels, bubles are too shor
[02:00:25] <Crom> t
[02:00:36] <MrSunshine> hell got a level that claims 0.02mm/meter so i guess that would do close enough =)
[02:02:44] <archivist> look at machine too measuring with levels and interferometers, where you move along the bed noting the local angle making a graph of the wavyness
[02:13:36] <Deejay> moin
[03:24:49] <Tom_itx> Jymmm, that's the Dallas onewire protocol
[03:27:15] <Jymmm> Tom_itx: and?
[03:35:00] <Jymmm> http://playground.arduino.cc/Learning/OneWire
[05:34:15] <Valen> MattyMatt: induction motors have all sorts of magic in them, they depend on rotating magnetic fields to produce a torque
[05:34:42] <Valen> and they have slip between the rotating magnetic field and the rotor in order to work
[05:35:25] <Valen> one with magnets is basically a stepper with fancy electronics, the magnetic field produced by the windings is locked to the position of the rotor
[05:36:24] <Valen> you can use AC servo's to do stuff, but the mesa 8i20 won't drive them, so you need a driver and then to interface with it and I have an irrational dislike for analouge segments in my setup lol
[05:38:12] <Valen> do levels get better than ~.02mm /meter archivist?
[05:38:44] <Valen> I'm pondering how to align the rails on a gantry machine that won't have the best foundation
[05:39:26] <Valen> cracked concrete on clay so it may go up and down with the ground water levels
[05:41:25] <malcom2073> How accurate do you need? I've seen people put rails direct on
[05:41:31] <malcom2073> steel beams*
[05:41:44] <malcom2073> as long as one rail is aligned to the other, and they're fairly level they do ok
[05:42:00] <Valen> its aligning the two rails that is my query
[05:42:29] <malcom2073> My plan is actually to use the gantry itself on the one I'm building. Get one rail secured, then run the gantry along the other and adjust as needed as I tighten down
[05:43:06] <Valen> I'm thinking of a laser system to get the beams straight, and the machine should be relativley good at keeping them so, but where the feet go could well move some
[05:48:44] <SpeedEvil> Verdi: http://www.totallyscrewedmachineshop.com/documents/FoundationsofMechanicalAccuracy.pdf
[05:48:46] <SpeedEvil> Valen:
[05:49:29] <Valen> but thats *long* lol
[06:11:01] <jthornton> I must have a bad network connection on the shop computer the backup speed was 0.12 MB/s
[06:26:41] <SpeedEvil> varesa: yes.
[06:26:47] <SpeedEvil> oops
[08:08:15] <dirty_d> these bearings should probably be replaced right? https://www.youtube.com/watch?v=DUtQHQ4PAME
[08:08:57] <dirty_d> first video cleaned with WD-40, then this one lubed with oil https://www.youtube.com/watch?v=exF--umgc5E
[08:33:41] <skunkworks> gromits, !!
[08:36:05] <archivist> dirty_d, too quiet to make a judgement
[08:36:20] <dirty_d> yea it was louder in the reals
[08:36:37] <dirty_d> i could tilt the bearing a little bit
[08:36:43] <dirty_d> but no noticable radial play
[08:36:50] <archivist> I think your camera shuts down the audio due to tapping the camera
[08:36:56] <dirty_d> hmm
[08:37:15] <dirty_d> the noise was worst cleaned with wd-40
[08:37:19] <archivist> that click at the beginning of the vid
[08:37:21] <dirty_d> almost silent lubed with oil
[08:38:00] <archivist> silen with oil is not too bad, can you see pitting in the races
[08:43:16] <archivist> !later Valen my Cooke Troughton & Simms Ltd 12 inch level 1 div= .0005" in 10" .05mm in 1M easily senses the floor bending, will also see you machine bend when you lean on it with your little finger
[08:43:17] <the_wench> will tell Valen when he/she joins next
[08:44:27] <skunkworks> we have a .0005" level too.. works really great for leveling machines..
[08:44:56] <archivist> I think he wants an excessive resolution for his job
[08:45:26] <archivist> but good levels are magic :)
[08:45:31] <skunkworks> they are.
[08:46:29] <archivist> a pair of us made some wooden steps, got the sides slope parallel to 19 minutes
[08:46:39] <archivist> was a giggle
[08:46:43] <skunkworks> heh
[08:47:11] <archivist> I wonder how far they have moved since
[08:50:51] <MrSunshine> who wants excessive resolution for a job? =)
[08:51:34] <MrSunshine> ahh Valen
[09:04:45] <dirty_d> archivist, nope no pitting or rust, looks perfect
[09:05:01] <archivist> use them then
[09:05:55] <archivist> they will probably never sound nice dry or nearly dry with wd40
[09:07:03] <archivist> I assume this is that experimental fuel injection thing
[09:14:32] <JT-Shop> dang it's cold this morning
[09:49:16] <dirty_d> archivist, no this is a friends jet ski
[09:49:30] <dirty_d> the taper where the flywheel mounts is haggard beyond repair
[09:50:20] <archivist> ran it loose?
[09:52:07] <witnit> Im not using joint 1 and i have no limit switches connected, yet i get random joint 0 or 1 following error and error on limit switch. Im using a ti33 and 7i90.
[09:52:27] <witnit> 7i33*
[09:53:23] <archivist> limit switch configured but not wired? (we had one a few days ago do that
[09:59:12] <witnit> yeah, they configured, not wired
[09:59:39] <archivist> then make sure pulled up/down as needed
[10:00:04] <dirty_d> archivist, i have no idea what actually happened, i have a feeling it was like that when he bought it
[10:00:36] <witnit> well, im also getting random following errors on axis which are not attached either
[10:00:42] <dirty_d> i think someone might have put it together wrong
[10:00:54] <witnit> so i feel like the two problem are not connected
[10:01:01] <witnit> are connected*
[10:01:02] <archivist> dirty_d, lots of bodgers about
[10:01:17] <archivist> witnit, porbably not connected
[10:03:09] <witnit> well i will try to drive the z axis and will get joint 0, joint 1, and limit switch errors, back to back, but otherwise it may run fine. is it possible a realtime issue would call random faults to the card?
[10:03:37] <archivist> dont think so
[10:04:06] <archivist> unless you have really dodgy wiring and noise problems
[10:05:19] <pcw_home> random errors scattered between axis may be interface related
[10:07:16] <pcw_home> errors on EPP interface to 7I90 could cause bad encoder reads which would show up as random following errors
[10:07:57] <MattyMatt> dirty_d, there's no such thing as haggard beyond repair, if you watch enough keith fenner vids
[10:08:28] <MattyMatt> he'd blob it up with weld, then machine it true again
[10:08:45] <pcw_home> so perhaps noise getting into interface or a ground loop (so significant HF current feeding though interface cable to PC ground)
[10:10:48] <dirty_d> MattyMatt, well i really mean haggard beyond my ability to repair
[10:11:02] <dirty_d> if i had a lathe maybe, but even then i dont know the taper angle and dimensions and stuff
[10:11:17] <dirty_d> its that screwed up that there is nothing that can be measured
[10:11:32] <MattyMatt> and no lathe could be a problem :)
[10:12:29] <dirty_d> oh haha, ive seen taht channel
[10:12:31] <witnit> pcw_home go to work so i can call in two more of these cards :)
[10:12:34] <dirty_d> diy 3d metal printing
[10:13:22] <witnit> I will try taking the extension cable out of the loop and use an alternative power supply for the mesa cards
[10:14:03] <witnit> the wiring is very simple in the machine, strange it is pulling these errors, so it could be the extension cable to
[10:14:21] <witnit> the cards or it could be EM near the boards?
[10:14:53] <witnit> possibly a goofy epp?
[10:17:10] <pcw_home> My guess would be direct coupling to the EPP cable or a ground loop
[10:18:07] <MattyMatt> all 3d metal printing I know leaves either a porous sintered form, or a welded one, which is like cast metal, so it'll probably still need machining
[10:19:29] <witnit> ok, lets say its the the motor V is feeding back into the card via encoder or through the drv/gnd signal lines via the amp?
[10:20:53] <witnit> is it possible the encoders are drawing too much on the card and my card is under powered?
[10:21:47] <dirty_d> this was fun to get off http://imgur.com/pJvimOT.jpg
[10:22:01] <archivist> coupling inductively, capacitively, or on the ground and therefore a common mode problem
[10:22:38] <pcw_home> sure that needs to be checked with a voltmeter
[10:22:40] <pcw_home> but most noise problems I have seen can be traced to ground loops
[10:23:51] <archivist> http://en.wikipedia.org/wiki/Ground_loop_%28electricity%29
[10:27:25] <DaPeace> thanks for helping me yesterday guys.. 2 steppers on x-axis is working without problems.. stepperconf is only running one of both steppers but axis and gmoccapy are doing what i want :-)
[10:28:37] <witnit> well i have the machine about 2 towns over, everything worked well here then i sent it over, they built it a new box and wired it up, i checked everything out and now fired it and am now getting wild errors. thanks for the help guys im headed over right now to double check all these intereferance possibilities
[10:29:37] <archivist> dont forget your scope :)
[10:30:25] <witnit> I built a rack for it, to hang in the back of the pick-up truck cab window
[10:30:33] <MattyMatt> DaPeace, you could've run 2 steppers off 1 driver.
[10:30:52] * archivist slaps MattyMatt bodge
[10:30:52] <MattyMatt> it's a bit evil, but it works
[10:31:22] <MattyMatt> in parallel if the driver has enough amps, or series if it doesn't
[10:31:32] <archivist> and also fails to get the phases correct for a square gantry
[10:32:07] <dirty_d> i need to make a jet ski trailer on the cheap
[10:32:12] <dirty_d> should i just use aluminum?
[10:32:39] <dirty_d> cheaper than stainless
[10:33:21] <MattyMatt> isn't it always cheaper to start with a plain trailer chassis?
[10:34:15] <dirty_d> i dont have one
[10:34:21] <MattyMatt> craigslist do
[10:35:45] <MattyMatt> trailer wheel bearings are a surprisingly cheap source of tapered roller bearings, as an aside :)
[10:35:54] <dirty_d> cant find anything appropriate, and its all expensive anyway
[10:36:05] <SpeedEvil> search wheel bearing
[10:36:08] <SpeedEvil> on ebay
[10:36:24] <dirty_d> leaf springs and wheels will be the most expensive
[10:36:28] <dirty_d> the metal is cheap as hell
[10:36:47] <MattyMatt> I don't want random sizes. trailer wheels are all 1" or 1.25", worldwide. good for open source
[10:36:50] <dirty_d> jet ski is only 250lbs
[10:36:53] <archivist> or scrap like http://www.ebay.co.uk/itm/181748070076
[10:37:08] <SpeedEvil> dirty_d: scrapyard
[10:37:22] <dirty_d> thats where i get the metal
[10:38:03] <archivist> two mini rear hubs
[10:38:14] <SpeedEvil> old mini
[10:38:30] <dirty_d> hmm, i see no leaf srpings for less than like 1500lbs
[10:38:34] <SpeedEvil> basically look for the smallest vehicle you can find
[10:39:02] <SpeedEvil> for 250lb, you could make wood leaf springs just fine
[10:39:03] <archivist> get a subframe of old mini includes all you need
[10:39:45] <dirty_d> id use these with no springs, http://www.amazon.com/WheelEez-Low-Pressure-Polyurethane-Wheel-WZ1-30UA/dp/B002R664AK/ref=sr_1_1?ie=UTF8&qid=1432221423&sr=8-1&keywords=balloon+tires
[10:39:51] <dirty_d> dont think theyre street legal though
[10:40:35] <dirty_d> the laws are rediculously vague
[10:40:36] <archivist> using old car bits gets you stuff capable
[10:40:45] <dirty_d> yea
[10:40:52] <dirty_d> i want it to be as light as possile
[10:41:09] <SpeedEvil> dirty_d: motorbike bits?
[10:41:12] <dirty_d> because i want to tow it with my car and be able to cart it by hand down a sand beach if i need to
[10:41:22] <archivist> look for indispension units too
[10:42:12] <dirty_d> neat http://www.indespension.co.uk/213-units-complete-with-stub-axle
[10:42:16] <dirty_d> didnt know those existed
[10:42:40] <archivist> no leaf springs needed http://www.ebay.co.uk/itm/Indespension-TRAILER-SUSPENSION-UNITS-500KG-with-hubs-bearings-and-caps-/111675230984
[10:45:48] <dirty_d> trailer might be too light for those
[10:46:19] <archivist> dont forget your load too
[10:47:04] <dirty_d> load is 250lb
[10:47:08] <SpeedEvil> http://www.ebay.co.uk/itm/NEW-Heavy-Duty-Metal-Green-Garden-Cart-Barrow-Utility-Trolley-Garden-Home-/181736601803?pt=LH_DefaultDomain_3&hash=item2a505878cb
[10:47:14] <SpeedEvil> I'm sure this'll work just fine
[10:47:46] <dirty_d> i dont think i can tow that
[10:47:56] <archivist> they bed very easily /me has experience :)
[10:48:00] <archivist> bend
[10:48:44] <dirty_d> archivist, the indespension units?
[10:48:54] <archivist> those garden barrows
[10:49:33] <archivist> indespension units are a little stiff and can get hard with age
[10:49:40] <dirty_d> that thing has suspension?
[10:49:58] <archivist> only the tires
[10:50:05] <dirty_d> yikes
[10:50:20] <dirty_d> i think i can just make my own suspension
[10:50:27] <dirty_d> mount the tire on a lever with a regular spring
[10:50:57] <archivist> the rubber in the indespension acts as a damper too
[10:51:28] <MattyMatt> does the jetbike resemble a quadbike from the same manufacturer?
[10:51:51] * MattyMatt just remembers jeremy clarkson's one
[10:51:59] <dirty_d> ill use a copper pipe and rod with a neodymium magnet piston bolted on it as a damper in the middle of the spring
[10:52:05] <dirty_d> just kidding
[10:53:21] <dirty_d> but it would work! https://www.youtube.com/watch?v=keMpUaoA3Tg
[10:55:02] <MattyMatt> it works with alu too
[10:55:16] <dirty_d> https://www.kjmagnetics.com/proddetail.asp?prod=RX038DCB-N52
[10:55:18] <dirty_d> ahh yes
[10:55:48] <MattyMatt> where that'd be good is as a speed limiter on the ramp, which wou've extended so you can ride straight into the water
[10:56:16] <MattyMatt> fairground rides and elevators use them all the time now
[10:56:22] <MattyMatt> frictionless brake
[10:56:33] <dirty_d> https://www.onlinemetals.com/merchant.cfm?pid=6996&step=4&showunits=inches&id=71&top_cat=0
[10:56:53] <dirty_d> its like they were made for each other
[10:57:45] <Rab> Is the effect dependant on the mass/wall thickness of the tube?
[10:57:50] <dirty_d> probably
[10:58:08] <dirty_d> i have no idea how to figure out how much damping there would actually be
[10:59:10] <dirty_d> probably like the resistance of a ring of the pipe the same height as the magnet
[10:59:15] <dirty_d> and the velocity of the magnet
[10:59:21] <dirty_d> and stuff
[10:59:42] <archivist> thicker copper= more current, more field
[10:59:55] <MattyMatt> if you geared up the spring travel, with a quadrant etc, you'd get more damping for less weight
[11:00:04] <dirty_d> wont it mot matter after a certain thickness because of inverse square strength of the field
[11:00:15] <MattyMatt> 2 small magnets either side of an alu quadrant, like brake calipers
[11:00:52] <dirty_d> beyond 3/16" it probably wont do any more
[11:01:04] <dirty_d> wild ass guess
[11:01:32] <dirty_d> do i even need any damping?
[11:01:37] <dirty_d> leaf springs dont right?
[11:01:41] <dirty_d> or is the rubber?
[11:01:52] <MattyMatt> jetbikes are made for bumpy rides
[11:02:13] <dirty_d> yea not worried about that, more worried about the trailer getting out of control somehow
[11:02:34] <dirty_d> like bouncing
[11:02:37] <dirty_d> maybe swerving
[11:02:50] <archivist> damping, the right much
[11:04:26] <SpeedEvil> MattyMatt: that would also - gearingup - massively increase 'unsprung weight'
[11:04:30] <MattyMatt> active suspension. put the magnet calipers on a servo loop
[11:04:53] <MattyMatt> just gear it up for the damper
[11:05:13] <MattyMatt> if you need to, dunno how smooth the intended roads are
[11:05:51] <MattyMatt> if it's an off road trailer then it's likely going fast enough to work a mag damper alreader
[11:06:20] <SpeedEvil> Also - supermagnets die at ~80C
[11:06:34] <SpeedEvil> andthe damper is not lossless
[11:06:54] <MattyMatt> ah right :)
[11:07:30] <MattyMatt> it'll be in the wind, but constant use on a suspension is not how I've seen these work
[11:08:40] <dirty_d> well the damper is all loss right?
[11:09:10] <dirty_d> converts all of the work to heat
[11:09:15] <SpeedEvil> dirty_d: yes - you have losses - resistive - in the copper/Al
[11:09:47] <dirty_d> i guess i can use go cart tires
[11:09:49] <MattyMatt> put a row of magnets through a coil. regenerative damping
[11:09:54] <dirty_d> trailers below 3000lb dont need to be inspected
[11:10:19] <dirty_d> and i dont raelly plan on going on the highway
[11:10:35] <MattyMatt> regenerative damping powers GPS theft tracker. works forever no battery
[11:11:45] <MattyMatt> "the signal's getting stronger, colonel. they've left the hardtop"
[11:12:35] <dirty_d> cat beat that price http://www.amazon.com/NEW-10-AIR-Tires-Wheels/dp/B000J6A4S8/ref=sr_1_1?ie=UTF8&qid=1432223416&sr=8-1&keywords=go+cart+tires
[11:12:52] <MattyMatt> yeah I saw those
[11:13:43] <MattyMatt> good robot wheels, but I wouldn't trust them on the road
[11:13:55] <MattyMatt> certainly not above 30mph
[11:14:09] <SpeedEvil> I wish there was a nice way to drive those
[11:14:11] <dirty_d> because of the rubber?
[11:14:30] <SpeedEvil> Actually - those aren't bad
[11:14:45] <dirty_d> you can make a flange from a large od pipe and a plate
[11:14:49] <dirty_d> then bolt it to the hub
[11:14:54] <dirty_d> and mount a sprocket on it
[11:15:17] <SpeedEvil> yeah - the ones I saw were considerably more annoying to mount to - that doesn't look too bad as it's flat
[11:16:23] <dirty_d> im reading comments saying not to use it for even a go cart
[11:25:03] <dirty_d> i could do something silly like torsion bar suspension
[11:31:53] <MattyMatt> rear frame off a renault 16 will get you a good setup like that
[11:32:27] <archivist> they all went back to iron ore :)
[11:33:17] <MattyMatt> mine was on its way at the time :)
[11:35:04] <MattyMatt> dirty_d, attach hoverskirt for towing jetski. also useful for large flat beaches
[11:35:45] <MattyMatt> too much top gear
[11:37:01] <MattyMatt> http://www.amazon.com/How-To-Plans-PLAN0053a-Utility-Trailer-Plans/dp/B00BGSB4PK/
[11:37:30] <archivist> I wonder how many of the DAF rubber band cars are left
[11:39:58] <archivist> http://en.wikipedia.org/wiki/DAF_Daffodil
[11:41:22] <archivist> my lathe has the same idea for variable speed and predates that
[11:41:46] <MattyMatt> http://www.ebay.co.uk/itm/AC-INVACAR-Model-70-Salisbury-Variable-DRIVE-PULLEY-NOS-Invalid-Carriage-/131506577378
[11:41:51] <Rab> 0-50 MPH time was a 29 seconds, as tested by the Consumers Union in the United States.
[11:42:29] <MattyMatt> aargh, £45 is just the pulley. that invacar looks tidy
[11:43:29] <archivist> most were snatched back by the gov and crushed
[11:43:40] <archivist> rare beast now
[11:44:22] <Rab> Haha @ DAF engine pic, typical Bosch distributor cap with two contacts sealed off.
[11:45:13] <SpeedEvil> ' Two separate transmissions ran the two driving wheels, eliminating the need for a differential.
[11:45:19] <SpeedEvil> well, that's special
[11:46:04] <archivist> the end http://www.3wheelers.com/endinva.html
[11:47:19] <dirty_d> meh, for now i guess ill just make due with picking it up and puting it in a truck bed
[11:47:25] <dirty_d> easy enough with two people
[11:47:30] <dirty_d> still doable with 1 person and rope
[11:48:02] <archivist> a bugger after you fell off it at speed though
[11:48:27] <SpeedEvil> dirty_d: a little loading platform might be a good idea
[11:48:47] <dirty_d> yea
[11:49:37] <dirty_d> metal ramp and a winch
[11:49:48] <dirty_d> some kinda little platform with rollerblade wheels taht ride on the rails
[11:50:11] <SpeedEvil> Scissor jack
[11:50:23] <SpeedEvil> Catapult
[11:50:58] <dirty_d> yes catapult
[11:51:28] <MattyMatt> jato
[11:51:36] <SpeedEvil> https://www.youtube.com/user/JoergSprave - related
[11:51:38] <dirty_d> giant quadcopter
[11:53:57] <MattyMatt> http://www.ebay.com.au/itm/old-vintage-440-variable-speed-drive-electric-motor-automotive-pulley-industrial/121342247812 ah australia
[11:54:30] <dirty_d> yea taht not a winch
[11:54:42] <dirty_d> arent there like spiral pulleys?
[11:54:55] <dirty_d> wrap rope around and pull it tight and it will pull it
[11:54:58] <dirty_d> with a motor
[11:55:24] <MattyMatt> that's a capstan
[11:55:44] <dirty_d> yea that
[11:55:59] <dirty_d> yea no spiral, the rope is the spiral
[11:56:29] <MattyMatt> it's the wrap. one full turn gives huge drive friction
[11:57:10] <dirty_d> yea
[11:57:29] <MattyMatt> it needs someone to mind it tho, which makes launching a 2 man op
[11:58:11] <dirty_d> yea
[11:58:16] <dirty_d> plus i dont have a truck
[11:58:30] <dirty_d> have access to one, but not all the time
[11:59:24] <dirty_d> ill put it on my roof, lol
[11:59:26] <MattyMatt> dig a channel to the water
[11:59:44] <MattyMatt> jetski to where you want to jetski
[12:00:06] <dirty_d> too bad there arent old style sewers like in indiana jones
[12:01:18] <dirty_d> http://www.amazon.com/Best-Choice-Products%C2%AE-Watercraft-Capacity/dp/B00LXCLE72/ref=sr_1_cc_5?s=aps&ie=UTF8&qid=1432226339&sr=1-5-catcorr&keywords=pwc+trailer
[12:01:28] <dirty_d> just gonna tie that to my car with a rope and hope for the best
[12:01:35] <dirty_d> good luck everyone
[12:04:51] <DaPeace> short question.. my 3-axis-controller has pwm/vfd-output. ive figured out that the spindle is only moving if pwm is output. do i need to connect the enable-pin too or would that be enough ?
[12:05:52] <cradek> sometimes enabled but stopped and disabled are quite different
[12:05:56] <cradek> so ... it depends
[12:18:29] <dirty_d> hmm, i wonder how hard it would be to make a AC/DC tig with 4 of these http://www.ebay.com/itm/2-PRX-CM600HA-24H-IGBT-Power-Modules-1200V-600A-H-Series-Powerex-/191578231431?pt=LH_DefaultDomain_0&hash=item2c9af3d287
[12:20:45] <SpeedEvil> you need isolated drivers
[12:20:58] <SpeedEvil> do you mean starting from a normal buzz-box?
[12:21:23] <SpeedEvil> If you're starting from AC, you need 8
[12:22:33] <dirty_d> i have i have a lincoln AC/DC 225
[12:22:50] <dirty_d> i use it as a dc tig also
[12:22:57] <dirty_d> with no current control besides the knob
[12:23:23] <dirty_d> havent tried AC tig with it, 60Hz probably is too slow
[12:24:29] <dirty_d> hmm http://www.millerwelds.com/resources/articles/Inverter-technology-revolutionizes-TIG-GTAW-frequency/
[12:24:30] <SpeedEvil> If you have DC out, then you can do it with 4, yes
[12:24:36] <dirty_d> i guess all ac tigs used to be 60Hz
[12:24:39] <ssi> 60Hz is fine, it just doesn't focus as tightly
[12:24:47] <ssi> many ac tigs are still 60Hz
[12:24:49] <SpeedEvil> also, you cna do modulated 60hz just fine
[12:24:55] <ssi> I have a relatively modern synchrowave and it's 60Hz only
[12:24:59] <SpeedEvil> which won't quite be the same as simple AC
[12:25:00] <SpeedEvil> ssi: 120
[12:25:01] <dirty_d> hmm
[12:25:06] <SpeedEvil> ssi: if DC anyway
[12:25:07] <dirty_d> awesome
[12:25:13] <ssi> the big advantage of the inverter machines is the freq control
[12:25:13] <SpeedEvil> (unless it's fucking wierd)
[12:25:25] <ssi> you can tighten up the arc quite a bit for welding aluminum
[12:25:36] <ssi> but it's not necessary
[12:26:40] <dirty_d> ssi, 60Hz fixed duty cycle?
[12:27:13] <ssi> my machine is a squarewave machine, and it has adjustable balance
[12:27:17] <ssi> but not adjustable frequency
[12:27:25] <ssi> my machine also has a pulser
[12:27:44] <dirty_d> ahh
[12:27:47] <ssi> balance is the duty cycle
[12:27:55] <ssi> allows you to adjust the balance between penetration and cleaning
[12:27:59] <dirty_d> why locked at 60Hz then?
[12:28:07] <ssi> because it's just a rectified transformer machine
[12:28:17] <ssi> it's not an inverter
[12:28:22] <dirty_d> how is balance adjusted then
[12:28:26] <dirty_d> and how is it square wave?
[12:28:26] <ssi> beats the shit out of me :D
[12:28:39] <dirty_d> i thought youd need an inverter for that
[12:28:45] <ssi> you don't need an inverter for square wave
[12:29:08] <ssi> I dunno how they do duty cycle control
[12:29:14] <ssi> but it's definitely a transformer machine, not an inverter
[12:30:10] <dirty_d> i need to go get some argon and try this out
[12:32:04] <SpeedEvil> In principle, if you simply add a rectifier and big cap, and an inductor, and a h-bridge, you can do arbitrary stuff
[12:32:32] <archivist> including create fire
[12:32:35] <dirty_d> yea
[12:32:49] <dirty_d> if 60hz sine wave works for aluminum ill make do with that
[12:33:28] <SpeedEvil> Simply adding a bilateral h-bridge to an AC welder will let you change AC/DC balance, pulse, ...
[12:35:25] <dirty_d> whats taht mean, 4 transistors?
[12:36:00] <dirty_d> just like this? http://en.wikipedia.org/wiki/H_bridge#/media/File:H_bridge.svg
[12:36:27] <SpeedEvil> Not quite.
[12:36:46] <SpeedEvil> You can't switch AC with four IGBTs, or FETs, you need 8.
[12:37:07] <SpeedEvil> But for DC - sure
[12:37:21] <dirty_d> i already have DC so good
[12:37:36] <dirty_d> youd need an inductor on the output right?
[12:37:40] <SpeedEvil> That is 'DC' that is pulsed 120hz AC
[12:37:56] <SpeedEvil> Not if you're relying on the inductance of your welder
[12:37:59] <dirty_d> yea i dont think there is a capacitor in theis welder
[12:38:25] <dirty_d> hmm
[12:38:26] <SpeedEvil> The cap would be to use the existing welder simply as a 300A/30V or whatever supply
[12:38:29] <dirty_d> but not in the off time
[12:38:42] <dirty_d> in the off time the current is just freewheeling through the body diodes
[12:38:44] <dirty_d> right?
[12:39:26] <SpeedEvil> For a DC output welder - if the h-bridge simply puts high/low each side, then there is no freewheeling
[12:40:21] <dirty_d> hmm, dont you need to to not destroy the transistors?
[12:40:37] <dirty_d> the cables have inductance
[12:40:55] <dirty_d> well i mean not something you need to do, wouldnt it just happen?
[12:41:25] <SpeedEvil> those won't cope with HV start
[12:42:00] <dirty_d> i wouldnt even bother
[12:42:07] <dirty_d> scratch starting is easy enough
[12:42:12] <dirty_d> tahts what im doing now
[13:19:23] <dirty_d> neat http://www.arcpig.com/howitworks.html
[13:38:05] <furrywolf> a strap-on trigger, eh? I do like strapons!
[13:43:00] <dirty_d> lol
[13:58:09] <SpeedEvil> https://www.youtube.com/watch?v=tRsfOGJ5lZg - Learning about resonance.
[14:41:30] <dirty_d> neat http://entropyproduction.blogspot.com/2005/10/uber-atomic-battery.html
[14:41:53] <dirty_d> they should make jet engines powered by that
[14:42:01] <dirty_d> for mars
[14:43:20] <unfy> kinda weird. installed some old windows software or whatever - and i didn't have to worry about going into custom install or selecting 'no' for bundled b.s. with the installer.
[14:45:21] <unfy> just reading the opening sentence, if it's a standard RTG, it's 1-2 kw/hr or something... for a lenghty period of time and decays as it ages - but as far as jets ? a typical passenger jet engine produces like 90kva of juice .... and there's 2-4 of these per plane :D
[14:50:01] <dirty_d> it uses a thorium-228 chain
[14:50:14] <dirty_d> excess of 20kW for 10 years
[14:50:18] <dirty_d> per kg
[14:51:01] <dirty_d> i think it starts off over 100kW/kg
[14:54:56] <zee-Lathe> need some help with tool table for lathe
[14:55:09] <zee-Lathe> finally using multiple tools in the same program and this is confusing me.
[14:55:43] <zee-Lathe> i zero the g54, then go touch a known work piece at the appropriate x and z. set my g54 to that
[14:55:49] <zee-Lathe> all this with tool 1.
[14:56:25] <zee-Lathe> now i go t05 m06 g43, and go to the same x and z point and touch off with the "tool table" option
[14:56:35] <zee-Lathe> now i do t01 m06 g43
[14:56:45] <zee-Lathe> and tool 1 is in the wrong position? what am i doing wrong
[15:02:41] <cradek> if you want t01 to be your reference tool, make sure it has zero tool offset, and make sure no tool offset is active when you touch off g54 with it
[15:03:04] <cradek> then follow your procedure and you'll find t5's tool offset is the difference between t5 and t1
[15:03:18] <zee-Lathe> so i gotta do g49
[15:03:22] <zee-Lathe> when i am using tool 1?
[15:03:24] <cradek> check the tool table as you're doing each step and make sure you're getting numbers that make sense
[15:03:41] <cradek> what is tool 1's offset?
[15:03:47] <zee-Lathe> 0
[15:03:51] <zee-Lathe> in the tool table
[15:04:12] <cradek> then it doesn't matter if you've done g49 or g43h1
[15:04:32] <cradek> but you better do one or the other after loading t1 before expecting no tool length offset to be in effect
[15:04:57] <zee-Lathe> maybe a step by step procedure will help me cause this is confusing
[15:05:07] <zee-Lathe> so far i have g54 setup. tool 1 offset is 0 in the tool table
[15:05:13] <cradek> no you don't need a procedure. you need to look at the tool table and the dro at each step and see if it makes sense
[15:05:15] <zee-Lathe> and t01 is selected
[15:05:30] <cradek> ok
[15:05:32] <zee-Lathe> now im doing t05 m06 g43
[15:05:36] <cradek> stop
[15:05:50] <cradek> after t1 m6 did you do g43 or g49 or neither?
[15:05:57] <zee-Lathe> neither
[15:06:05] <cradek> ok do you see why that's wrong?
[15:06:20] <cradek> because you probably had some other tool's tool offset still in effect
[15:06:33] <zee-Lathe> okay i did g43 and it didnt change anthing
[15:06:36] <zee-Lathe> for the x and z
[15:06:42] <zee-Lathe> did g49 too
[15:06:44] <zee-Lathe> didnt do anything
[15:06:50] <zee-Lathe> well thatd cancel the offset
[15:06:51] <cradek> ok
[15:07:02] <zee-Lathe> should i keep g49 active before i do t05 m06
[15:07:14] <cradek> ok touch it to the end of the work and see if you see Z=0
[15:07:14] <zee-Lathe> (good practice?)
[15:07:31] <zee-Lathe> yes its correct for tool 1
[15:07:37] <cradek> also X is right?
[15:07:39] <zee-Lathe> yes
[15:07:44] <cradek> ok
[15:07:53] <cradek> so now you do t5 m6 g43
[15:08:27] <cradek> touch the tool to the end of the work, what does Z say?
[15:08:42] <zee-Lathe> i think i know the problem..
[15:08:50] <zee-Lathe> i already have an offset in the tool table for t05
[15:08:56] <cradek> sure
[15:09:01] <zee-Lathe> so asap i do g43 for t5
[15:09:08] <zee-Lathe> it loads up that offset
[15:09:19] <cradek> yep
[15:09:23] <zee-Lathe> i dunno if me now touching off using the tool table option
[15:09:26] <cradek> but that's ok, tool touch off will update it
[15:09:29] <zee-Lathe> will overwrite in refrence to those values
[15:09:32] <zee-Lathe> or to g54
[15:10:01] <cradek> it will choose the tool offset such that the dro becomes what you say when that tool length is reloaded
[15:10:04] <cradek> then it reloads it for you
[15:10:09] <cradek> so it does just what you want
[15:10:32] <cradek> so now go touch the tool to the end of the work again, and do TOOL touch off for Z=0
[15:10:36] <cradek> be sure you get the tool one
[15:11:29] <XXCoder> heys
[15:13:27] <zee-Lathe> ok don e
[15:13:30] <zee-Lathe> going back to tool 1
[15:13:46] <zee-Lathe> by doing t01 m6 g43
[15:13:55] * skunkworks just recently did this.. following the directions in the linuxcnc manual for lathe tool touchoff works wonderfully
[15:14:56] <zee-Lathe> okay it works
[15:15:03] <zee-Lathe> the only thing i did this time was delete the values inside the tool table for t4
[15:15:15] <zee-Lathe> t5 i mean before touching it off with the tool touch off
[15:15:16] <zee-Lathe> hmm..
[15:15:36] <cradek> haha there's no mystery: you did it wrong before and you did it right this time :-)
[15:15:43] <zee-Lathe> wtf
[15:15:48] <zee-Lathe> now run my g-code
[15:15:50] <cradek> changing an unrelated tool didn't fix it, trust me!
[15:15:51] <zee-Lathe> and the offset is wrong
[15:16:19] <cradek> does the gcode change offsets?
[15:16:34] <XXCoder> yeserday was fun. had to reboot machine I was using in order to fix xyz drift.
[15:16:35] <zee-Lathe> (TOOL 1)
[15:16:35] <zee-Lathe> T01 M06
[15:16:35] <zee-Lathe> G43 H05
[15:16:35] <zee-Lathe> G96 D1800 S300 M03 (CSS MODE)
[15:16:45] <cradek> G43 H05
[15:16:45] <zee-Lathe> G00 G54 Z0.25
[15:16:46] <cradek> !!
[15:16:50] <zee-Lathe> whoops LOL
[15:16:53] <cradek> dude!
[15:16:55] <cradek> :-)
[15:16:57] <zee-Lathe> bhhahahahaha
[15:17:00] <zee-Lathe> bhahahahah!
[15:17:01] <cradek> DUDE
[15:17:07] <zee-Lathe> been going in circles
[15:17:20] <XXCoder> programmings like that zee-Lathe
[15:17:26] * zee-Lathe is never gcoding by hand again
[15:17:26] <XXCoder> little thing can kick your ass
[15:17:39] <zee-Lathe> yep that was it
[15:17:51] <zee-Lathe> so silly.
[15:18:00] <zee-Lathe> i should just do g43 with no hxx after
[15:18:18] * JT-Shop needs to add some info to the GoldWing manual... if the seat heater doesn't work see if it is plugged in
[15:18:21] <cradek> yeah I always type: t_ m6 g43
[15:18:42] <cradek> haha seat heater on a motorcycle!
[15:18:43] <zee-Lathe> hahaha i cant believe i did that
[15:18:45] <JT-Shop> same here
[15:18:46] <zee-Lathe> thank yo1
[15:18:55] <JT-Shop> and grip heater too
[15:19:21] <cradek> I used to warm my gloves on the front cylinder head
[15:19:23] <JT-Shop> I was thinking I needed to get them to work for the 5:30 departure tomorrow with temps in the high 40's
[15:19:31] <cradek> now I'm old and I drive a car with seat heaters
[15:19:37] <XXCoder> lol
[15:20:06] <JT-Shop> lol I'm old and ride a couch on two wheels with a stereo
[15:20:41] <JT-Shop> I thinking is has not worked since the last time the seat was off the bike
[15:20:48] <cradek> heh
[15:21:45] <JT-Shop> you should see all the stuff under the seat and the top cover
[15:23:44] <JT-Shop> this trip we are packing light and not taking the trailer so I build a carrier for a water resistant box http://gnipsel.com/images/GL1800/GL1800%20Carrier%2003.jpg
[15:24:32] <JT-Shop> the color doesn't match but neither does the trailer lol
[15:58:22] <XXCoder> LOL!
[15:58:23] <XXCoder> https://i.chzbgr.com/maxW500/5282472192/h0DF730A0/
[15:58:35] <XXCoder> antitheif wood
[15:59:11] <XXCoder> For extra evilness dip the tip in oil to make it look used
[16:18:34] * Tom_itx swipes JT-Shop's leafblower when he's not looking
[16:21:38] <JT-Shop> only if you use it here first lol
[16:27:25] <Tom_itx> mine's just about shot
[16:30:04] <_methods> sweet scored teh tool post grinder for my little atlas lathe for $50
[16:33:31] <zeeshan|2> wow that is cheap
[16:33:47] <Deejay> gn8
[16:35:15] <_methods> we got a 39"x290" lathe
[16:35:22] <_methods> can turn some big stuff now
[16:39:20] <_methods> pete's going to kill me though i let 2 4th axis tsudakoma rn-100's get by for for $250/ea
[16:39:38] <_methods> the 2 4station 4th axis's went for $500/ea
[16:48:27] <CaptHindsight> lovely, now the USPS online forms print out as black pages when using FF on Linux
[16:48:29] <SpeedEvil> That is some lateh
[16:48:37] <SpeedEvil> CaptHindsight: fraud prevention
[16:48:43] <SpeedEvil> lathe
[18:53:37] <the_wench> Valen: archivist said my Cooke Troughton & Simms Ltd 12 inch level 1 div= .0005" in 10" .05mm in 1M easily senses the floor bending, will also see you machine bend when you lean on it with your little finger
[18:57:23] <Valen> the_wench: nifty thanks ;->
[18:57:25] <archivist> Valen, and some light reading on testing machine tools the section on levels http://www.collection.archivist.info/archive/DJC/BK/BK3151/
[19:01:07] <Jymmm> ve7it: Mr L
[19:02:00] <ve7it> Mr J... whatsup?
[19:02:29] <Jymmm> ve7it: Nada, just saw you signon and wanted to say hi
[19:03:42] <ve7it> I just crashed after shovelling 2 yards of fish compost onto the garden.... getting old sucks!
[19:04:22] <Valen> archivist what book?
[19:04:25] <Jymmm> ve7it: What?! No powered wheelchair front bucket?
[19:05:10] <ve7it> maybe next year....
[19:05:11] <archivist> Valen, testing machine tools, G. Schlesinger
[19:05:33] <Valen> oh about your website, have you considered cloudflare? its pretty much point and click and they will transparantly cache all your images and such
[19:05:35] <Jymmm> ve7it: Ah, ok. Or bribe/blackmail the neighbor kid?
[19:06:09] <Valen> the book is in metric, bliss ;->
[19:06:11] <archivist> Valen, who pays!
[19:07:09] <Valen> you do if you get "big"
[19:07:34] <Valen> (as in lots and lots and lots of pageviews, or you want https or other fancy stuff)
[19:07:59] <archivist> my data dir is 14gb
[19:08:06] <Valen> doesn't matter ;->
[19:08:49] <Valen> https://www.cloudflare.com/plans
[19:10:00] <Valen> bit fiddly, you need to make them the nameserver for your domain, then set your dns stuff in there
[19:10:28] <Valen> so www.foo won't point to your modem anymore, but you can make say direct.foo point to your modem for remote access stuffs
[19:11:00] <archivist> way over priced for a business page
[19:11:38] <Valen> depends on what you are doing
[19:12:32] <Valen> I presume if you are doing enough stuff on the interweb to warrant the extra features in it, $200 is chump change
[19:16:23] <Valen> (note just because its a commercial site doesn't mean you need a "business" plan)
[19:16:54] <Valen> I wasn't aware they crawled your site
[19:17:00] <Valen> that may not suit you
[19:17:42] <archivist> not a lot of space either Client maximum upload size 100 MB
[19:17:44] <Valen> ahh you can turn that off
[19:17:58] <Valen> that is the maximum size that somebody can *upload* to your site
[19:18:05] <Valen> through http post/get stuff
[19:19:40] <archivist> apart from static ip I am on standard isp costs only
[19:19:55] <Valen> are your uploads billed?
[19:20:52] <archivist> no
[19:21:02] <Valen> eh, leave it on then I guess
[19:21:24] <Valen> it'll slurp the whole 14gb (if its spiderable from your root page)
[19:21:39] <Valen> then anybody who hits it gets it from their CDN rather than your website
[19:21:41] <archivist> and 3 of us run the dns
[19:22:01] <Valen> If its not spiderable it'll just cache it when somebody views it
[19:22:29] <Valen> 3 people run the dns on a service you run from home? ;->
[19:22:36] <Valen> as in that one domain?
[19:22:53] <archivist> more than one domain
[19:23:01] <Valen> this is done per domain
[19:23:11] <Valen> so you could put archivist.org in there
[19:23:22] <Valen> and not bother anything else
[19:24:42] <Valen> what they do is when user says visit archivist.org/content.jpg they send the request to their servers in that users geographical location (hence the need for them to run the dns) that cache location sees if they have content.jpg if so they send it direct to the user, if not they then request it from your server
[19:24:55] <Valen> and cache it on the server for the next person
[19:25:20] <Valen> I believe said server then spreads it to all the other caches globally
[19:26:05] <archivist> I aint buying, stop selling a service beyond my means
[19:26:51] <Valen> lol
[19:27:03] <Valen> selling a free service
[19:28:15] <archivist> large disruption to way the site works, that does cost me
[19:28:57] <Valen> what disruption? (genuinely curious)
[19:44:48] <Jymmm> Valen: "you keep your existing hosting solution" cloudfare
[19:45:35] <Valen> you do, you can turn it on and off by changing where your nameserver is pointed
[19:45:55] <Valen> its basically a fancy transparent(ish) reverse proxy
[19:46:04] <Jymmm> Valen: doesn't make sense, what EXACTLY are they doing/offering?
[19:46:29] <Valen> caching proxy
[19:47:04] <Jymmm> ah
[19:47:23] <CaptHindsight> who pays for the space and bandwidth in and out of the proxy?
[19:47:42] <Valen> they do
[19:51:23] <Jymmm> Valen: So basically you setup a PTR on their DNS servers, and they dynamically issue the "closest" cache to the request dns?
[19:53:19] <Valen> I believe its all done under the ideal of, if you like it and get bigger you will then give them money
[19:53:25] <Valen> freemium
[19:53:42] <Valen> yeah
[19:54:39] <Valen> they also do fancy stuff like spdy and sending things like java stuff and css before its been requested by the client
[19:55:25] <Jymmm> You can't use a MX RR on their server, but youmust use their nameservers?!
[19:55:25] <Valen> I've used them for my site and a few customers sites for a few years with no issues
[19:55:45] <Jymmm> https://support.cloudflare.com/hc/en-us/articles/204643758-Which-Record-Types-does-CloudFlare-not-proxy-
[19:56:00] <Jymmm> https://support.cloudflare.com/hc/en-us/articles/202320534-Can-I-use-CloudFlare-without-changing-my-nameservers-to-CloudFlare-
[19:56:35] <Valen> uhh, they don't *proxy* your mx traffic
[19:56:42] <Valen> that goes direct to your server
[19:56:51] <Valen> I don't know about doing RR
[19:56:59] <Jymmm> I'm not talking actual MTA traffic, just MX records
[19:57:30] <Jymmm> are they just CNAMEing everything?
[19:57:32] <Valen> https://support.cloudflare.com/hc/en-us/articles/200168916-Can-I-use-round-robin-DNS-entries-
[19:58:01] <Valen> so they do seem to support roundrobin
[19:58:10] <Jymmm> Valen: Is that what they are really doing? Just round robin?
[19:58:15] <Valen> no
[19:58:16] <Valen> what?
[19:58:19] <Valen> ok
[19:58:28] <Valen> You can't use a MX RR on their server, but youmust use their nameservers?!
[19:58:32] <Jymmm> They say you HAVE to use their dns servers
[19:58:50] <Valen> yes
[19:58:53] <Jymmm> ...and that you can NOT add MX records
[19:58:57] <Valen> no
[19:59:12] <Jymmm> Yes, see link above
[19:59:15] <Valen> they say they will not *proxy* your mx servers
[19:59:25] <Valen> its in the title
[19:59:48] <Jymmm> ah
[19:59:56] <Valen> traffic to those names goes direct to your existing server, not through their proxy
[20:00:19] <Jymmm> you can have the MX records on their DNS servers, but they just won't proxy/cache mail
[20:00:27] <Valen> so for me, www.vapourforge.com goes through their proxy, mail.vapourforge.com goes to my server
[20:01:32] <Jymmm> I understand now
[20:01:40] <Valen> (in the dns config, both point to my server, one has the little cloud ticked)
[20:08:43] <Jymmm> Valen: Testing their DNS servers now =)
[20:11:36] <Jymmm> Valen: Ah, they restrict them
[20:12:54] <Valen> restrict them?
[20:14:27] <Jymmm> Valen: not allow them to be used for workstation lookups =)
[20:30:57] <CaptHindsight> Valen: lets say an acquaintance has a magnet link torrent listing site, can this help with reducing the bandwidth to those severs?
[20:31:25] <Valen> for a while CaptHindsight for a while ;-P
[20:39:39] <witnit> anyone live near Somers, Connecticut?
[20:39:49] <witnit> http://hartford.craigslist.org/tls/5015673733.html
[20:41:47] <Rab> witnit, what's the thing on the left side of the spindle?
[20:41:55] <witnit> collet closer
[20:42:08] <Rab> hmm
[20:42:23] <witnit> if you put a bar pusher or puller on the tailstock you can make parts autmatically
[20:42:30] <witnit> just hit play and walk away
[20:43:04] <Rab> Wonder if it's complete with the cross slide.
[20:43:21] <witnit> looks like everything but the tailstock
[20:43:48] <witnit> missing a handwheel maybe
[20:43:59] <witnit> but are you putting servo motors on it anyhow =D
[20:45:07] <Rab> Can't beat the rust belt for used machine tools. That thing would be $1500+ here, regardless of condition.
[20:45:22] <witnit> where is here?
[20:45:27] <Rab> Austin, TX
[20:46:04] <witnit> oh, lots of manufacturing on the other side of the border, probably where most of them go
[20:46:10] <Rab> More machining out in the small towns, and some manufacturing in San Antonio, but that never really existed here.
[20:46:23] <Rab> Yeah, that's likely.
[20:48:09] <witnit> being a the type of lathe that it is, they are often setup in factories for second operation, chamfer, debur, or multistep end work, like spot, drill, tap, chamfer, broach
[20:48:53] <witnit> they have a very nice turret attachment that go where the tailstock is
[20:49:10] <Rab> This is remarkably cheap, though: http://austin.craigslist.org/tls/5028933970.html
[20:51:35] <witnit> mhmmm
[20:51:36] <Valen> hah that'd be $3000 here
[20:51:40] <Valen> (australia)
[20:51:56] <witnit> Valen, why arent you building cnc lathes for people down under?
[20:52:14] <Valen> wellll.... we may have thought about it lol
[20:52:23] <witnit> little ones, locally constructed
[20:52:26] <Valen> but people here don't want to spend money
[20:52:40] <Valen> so they buy cheap crap from china and complain
[20:53:14] <witnit> you can buy most of your things on ebay and probably turn a crazy profit
[20:53:38] <Rab> Maybe not, after shipping.
[20:53:49] <Valen> nope shipping kills you
[20:53:57] <Valen> and you have to compete with china
[20:54:00] <witnit> most of the items come from just north right?
[20:54:18] <witnit> i mean all the stuff we get is closer to you than us anyhow hahah
[20:54:47] <witnit> electronics wise, amps and motors can come from anywhere and from any device
[20:54:59] <Valen> gotta remember australia is as big as america with 1/10th the population
[20:55:21] <witnit> you could probably get by pulling motors from treadmills
[21:04:09] <Valen> I'm still looking for a motor/amp combo
[21:04:17] <witnit> what is the load?
[21:04:27] <Valen> enough? lol
[21:04:39] <Valen> I want to pair a motor up with an 8i20
[21:08:34] <witnit> i think i got the motor you need in my kitchen hahaha
[21:08:39] <witnit> 2 more at the shop
[21:10:07] <Valen> tell me more ;->
[21:10:44] <witnit> gettys m443
[21:11:15] <witnit> 1.4 hp
[21:12:23] <witnit> i havent looked them up in a long time but am working on a build and wanted to see what these drives were
[21:12:37] <witnit> brought one home and havent checked it out
[21:13:17] <Valen> what voltage?
[21:13:50] <witnit> 230
[21:13:54] <Valen> not bad
[21:14:28] <witnit> 48.9 stall
[21:14:56] <Valen> little higher than the 8i20 would like but still
[21:15:16] <Valen> how much did you spend?
[21:17:50] <witnit> http://www.elwood.com/edn/033300.pdf
[21:18:07] <witnit> too much i think
[21:18:11] <witnit> 200
[21:19:26] <Valen> for all of them together?
[21:19:34] <witnit> yah
[21:19:41] <Valen> I hate you lol
[21:19:41] <witnit> how much would it cost to ship them there?
[21:19:53] <witnit> =D
[21:19:58] <Valen> what do they weigh?
[21:20:01] <witnit> i know its so easy to get this stuff here
[21:20:07] <witnit> alot
[21:20:08] <witnit> hahaha
[21:20:10] <witnit> brb
[21:20:54] <witnit> with cable the bathroom scale said something around 25
[21:21:03] <Valen> pounds?
[21:21:07] <witnit> yeah
[21:21:36] <Valen> lol some big motors there
[21:22:34] <witnit> there must be alot of copper in them, they dont look that heavy but you pick them up and you wished you would have bent at the knees
[21:23:20] <Valen> usps estimates ~$200 each ;->
[21:23:29] <witnit> incredible
[21:23:38] <Valen> can probably freight it cheaper
[21:23:45] <Valen> http://ircalc.usps.com/MailServices.aspx?country=10013&m=7&p=25&o=0&dpb=0&mdt=2015/05/22%2008:00&r=True&l=15.7480&h=3.9370&w=3.9370&g=0&dvi=50
[21:23:57] <witnit> I would be better off building a submarine and swimmng them to you
[21:24:22] <witnit> put a little sail on it and a gps
[21:25:01] <Valen> heh I was just looking at a guy building a boat and submarine
[21:25:22] <witnit> you just looked at him?
[21:25:24] <witnit> ahahjahjahj
[21:25:46] * Valen drops a bucket of iron ore on witnit
[21:25:47] <witnit> did he know you were watching
[21:26:15] <witnit> i was looking at your exports list is aus
[21:26:26] <witnit> its like, coal, iron ore, gem
[21:26:51] <witnit> and meat
[21:30:03] <Valen> our PM has said coal is the future
[21:30:09] <Valen> coal is good for humanity
[21:30:22] <Valen> the rest of the country thinks he is a dickhead
[21:32:28] <witnit> let me repgrase that for you
[21:32:57] <witnit> "Coal is lining my pockets, coal is making me alot of money"
[21:33:08] <witnit> rephrase* :P
[21:33:42] <witnit> coal has been wonderful for the growth of the industrial age and our leaps forward in technology
[21:34:18] <witnit> however, much like the old pack mule it will be replaced by superior system for the job
[21:36:01] <Valen> we had subsidies and targets for "green" power and the like, he ripped them all out
[21:36:13] <Valen> carbon price and such like
[21:36:29] <Valen> which was "killing the economy"
[21:36:55] <witnit> well, here there are laws in place, if you produce more electricity than you consume, up to X amount, the eectric company has to buy it off of you
[21:36:56] <Valen> took $50 off my $500 per quarter power bill
[21:37:12] <Valen> yeah he is getting rid of all that stuff
[21:37:27] <Valen> but still giving the coal generators subsidies
[21:38:19] <witnit> well, politcs i feel normally hinder science and growth
[21:38:47] <Valen> well with his law degree he has declared climate science as wrong
[21:39:05] <Valen> "crap" to use his words
[21:40:53] <witnit> i think the people of the world carry around with them in their pockets everyday the power to have a free form of internet. with very little effort internet and phone calls could be freee for all
[21:41:28] <witnit> yet the industry is charging insane amounts for people to transfer 1gb of data a month in some places
[21:41:44] <witnit> or a isp puts some major caps on their service
[21:42:50] <Valen> welll..... the last govt started on a plan to replace the last mile with fibre
[21:43:05] <Valen> fibre to the premisis, govt spend $30.5Bn
[21:43:25] <witnit> once all the infrastructure is there, its there..
[21:43:50] <witnit> very little maintenance on towers and crack a few satelites into the sky and your set
[21:44:00] <Valen> Tony dumdum cried about spending so much on a gold plated system that nobody would ever use because all you use internet for is tv
[21:44:09] <Valen> so they stopped the fibre rollout
[21:44:18] <Valen> and are reusing the existing copper
[21:44:44] <Valen> providing "up to" 100mbit if you happen to live close to a node and it hasn't rained in a while
[21:44:57] <Valen> for $29.5 billion
[21:46:29] <Valen> (and the report they commisioned to say that in 30 years data demand would be 15mbit, said that they would need to start replacing it 10 years after its finished
[21:47:23] <Valen> (the fibre comes with a 60 year *warranty*)
[22:14:56] <witnit> smh
[22:42:52] <Aero-Tec2> whats the dif from touch off work and touch off fixture?
[22:43:07] <Aero-Tec2> when do you use what?
[22:45:39] <Aero-Tec2> also it you have no home switches does it matter?
[22:52:43] <renesis> last question is too general, of course it matters
[22:53:17] <renesis> and touch off fixture means yu use the fixture as your reference instead of the stock
[22:54:04] <renesis> for example, if the stock is irregular but the fixture point is a known distance from the finished work origin
[22:55:26] <renesis> or youre making same 20 parts at once in some patterned fixture, it maybe makes sense to reference once instead of each part
[22:58:04] <renesis> also i dont run home or limit switches, mostly i return the machine to home before shutting down, turn on hit home, jog towards crashing to make sure the soft limits are right
[22:59:22] <renesis> my machine crashes its not a big deal the steppers lock and you go the other way and it doesnt get stuck, and ive never had problems with z skipping, so switches are kind of a low priority upgrade
[23:18:49] <Valen> we didn't have home switches for ages
[23:18:59] <Valen> we have index pulses on the linear scales now
[23:19:06] <Valen> hardly ever use them ;->
[23:19:31] <Valen> only if we are doing something that's going to go near the limits do we bother
[23:19:37] <Valen> (we also don't have limit switches lol)