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[00:42:28] <Oldmanbeefjerky> hello, im currently looking into buying a CNC mill, i need to be able to mill steel and titanium at the best, but im not looking for something huge
[00:42:34] <Oldmanbeefjerky> just a workshop sized mill
[00:42:49] <Oldmanbeefjerky> what kind of pricing am i looking at for new and used ones in working order
[00:42:53] <XXCoder> hurco vm10
[00:43:13] <XXCoder> car value for used one. new one I guess around $350,000
[00:43:28] <XXCoder> im sure there is better and cheaper options heh
[00:43:51] <Oldmanbeefjerky> im looking to buy one with some startup funds
[00:44:38] <Oldmanbeefjerky> i want to mass produce various "things" ive designed, and i need a mill to get it done
[00:44:47] <Oldmanbeefjerky> namely various gears
[00:45:28] <XXCoder> cool unfortunately im getting pretty good with only one cnc (brand and model I named previously)_
[00:45:44] <XXCoder> im sure others know more but this time is when channel goes mostly dead.
[00:47:06] <Oldmanbeefjerky> oh dear
[00:47:43] <Oldmanbeefjerky> i know absolutely nothing about cnc, what would you say i would expect to pay for a simble cnc capable of very high precision milling on steel?
[00:48:03] <XXCoder> my suggestion?
[00:48:13] <XXCoder> come in around 3 to 5 hours earlier
[00:48:18] <XXCoder> maybe more
[00:48:26] <Oldmanbeefjerky> righto then
[00:48:28] <XXCoder> channel'll be bit more chatty'
[00:48:39] <Oldmanbeefjerky> but im just asking your opinion, not fact
[00:48:43] <XXCoder> well maybe not at weekends. sat is pretty good but sunday nah
[00:49:10] <XXCoder> thats the problem, I dont know enough to give really valid opinion
[00:49:46] <XXCoder> I do know hurco vm10 can do what you ask for, but its riciously expensive for what you want to do unless youre looking into making business
[00:50:07] <XXCoder> its more expensive that average house. or 2 of em
[00:50:37] <XXCoder> *than
[00:58:47] <syyl_> "very high pecision"
[00:58:59] <syyl_> thats not a very precise question ;)
[00:59:12] <syyl_> are we talking about 1/1000mm?
[00:59:16] <Oldmanbeefjerky> no
[00:59:21] <Oldmanbeefjerky> hmm
[01:00:15] <Oldmanbeefjerky> i guess just one capable of milling gears
[01:00:32] <Oldmanbeefjerky> 1/50mm ought to do it
[01:00:55] <Oldmanbeefjerky> and working with tiny mill bits
[01:01:32] <syyl_> profiling gears with small endmills?
[01:01:43] <syyl_> that might be the most ineffizient way to make gears :D
[01:04:07] <Oldmanbeefjerky> im just looking at something that can
[01:04:30] <Oldmanbeefjerky> i dont know how fine they can go
[01:04:52] <syyl_> you can go down to endmills with .4mm diameter in steel without a problem
[01:05:15] <syyl_> that can be done on every little better vmc with a spindle that puts out some rpm
[01:06:37] <syyl_> nothing to be done on the average cnc router ;)
[01:07:34] <Oldmanbeefjerky> wow
[01:08:26] <Oldmanbeefjerky> well, if it can handle 1mm endmills im happy
[01:09:34] <Oldmanbeefjerky> so, how much am i looking to pay on a steel capable one which would support smaller endmills?
[01:09:51] <Oldmanbeefjerky> predominantly ide be doing such fine work on aluminium or plastic
[01:12:37] <toastydeath> you need to get a gear tooth cutter if you're trying to mill gears - doing it via profiling is a very bad way to do gears unless your application is trivial
[01:13:18] <Oldmanbeefjerky> hmm i see
[01:13:35] <toastydeath> (trivial as in the accuracy of the gear doesn't matter and it won't take much load)
[01:13:57] <toastydeath> (many applications fit both these criteria)
[01:14:05] <Oldmanbeefjerky> i guess than a cnc is plainly out of the question for me then :(
[01:14:17] <toastydeath> what are you trying to put gears in
[01:14:27] <Oldmanbeefjerky> gears suitable for rc cars
[01:14:33] <toastydeath> oh, you should be fine.
[01:14:42] <toastydeath> how big are these gears, diameter wise
[01:15:32] <Oldmanbeefjerky> i like gears at mod 0.6-0.8 and the spur gears at biggest would be 40-50mm
[01:15:52] <Oldmanbeefjerky> but i guess cnc for me is out of the question atm
[01:16:30] <toastydeath> the forces are pretty light, you'll probably be okay
[01:16:33] <Oldmanbeefjerky> requesting someone to make me a bunch of aluminium gears would be out of the question right?
[01:16:36] <toastydeath> esp if they're in steel
[01:16:42] <toastydeath> yep, pretty much.
[01:16:44] <Oldmanbeefjerky> given the required endmill
[01:16:58] <Oldmanbeefjerky> no, aluminium
[01:16:58] <toastydeath> no, most people won't touch one off jobs with a ten foot pole
[01:17:12] <Oldmanbeefjerky> dang
[01:17:13] <toastydeath> ..are aluminum gears common in RC applications?
[01:17:30] <toastydeath> because if it were me, that's the last goddamn thing i'd make a gear out of
[01:17:32] <Oldmanbeefjerky> they are generally hardened after being cast
[01:17:42] <syyl_> i wouldnt touch a aluminum gear with a 10ft pole ;)
[01:17:43] <Oldmanbeefjerky> or are an alloy
[01:17:59] <Oldmanbeefjerky> well, further thought, the whole thing is silly
[01:18:20] <Oldmanbeefjerky> thanks for the insight, ima go now
[01:18:23] <Oldmanbeefjerky> cya
[01:18:24] <toastydeath> good luck
[01:18:29] <syyl_> for one offs i would go to a wedm shop..
[01:18:31] <syyl_> ah
[01:18:33] <syyl_> gone
[01:43:56] <roycroft> i'd rather make a gear out of aluminum than pizza dough
[01:44:15] <syyl_> hmh
[01:44:17] <syyl_> pizza
[01:44:25] <syyl_> nomnom ;)
[01:44:36] <syyl_> delicious gears
[01:44:42] <roycroft> a pizza dough gear would have the adavantage of being able to be eaten
[01:44:53] <syyl_> YES
[01:44:54] <syyl_> :D
[01:45:02] <syyl_> and would be as usefull as a gear from aluminum
[01:46:20] <roycroft> tomato sauce will put pits in aluminum
[02:15:39] <Deejay__> moin
[05:37:35] <MrL> Hi, I am atrying to install the linuxcnc 2.6 on my lubuntu but im stuck at obtaining the key from the key server as the server timeouts. Anyone can help me?
[07:54:52] <elmo40> Connor: PSUs are designed to handle multivolt; 120V(one hot, one neutral) or "european" 240V(two hot). This is why they cut both leads.
[08:30:53] <steve_stallings> linuxcnc-devel
[08:31:43] <steve_stallings> oops - wrong window
[08:44:33] <CaptHindsight> trace of snow last night
[08:56:05] <elmo40> snow? the kiddie will have to make warm costumes for Halloween!
[10:20:20] <ssi_> morn
[10:21:36] <SpeedEvil> Mornign
[10:24:18] <ssi> so I was up all night reading about fanuc red cap motors and their stupid proprietary commutation
[10:26:36] <SpeedEvil> http://www.scp-wiki.net/scp-914 (sort-of-not-really-on-topic)
[10:26:49] <pcw_home_> 4 bit commutation?
[10:27:06] <ssi> pcw_home_: I believe so
[10:27:28] <ssi> right now it's looking like my best option is to pull them into inputs and use bldc to fake hall outputs for my drives
[10:28:06] <pcw_home_> I think Asah worked on that some (the bldc comps code is not quite right but I think Asah has it working)
[10:28:48] <pcw_home_> Pico systems has a converter (its probably not a giant deal either)
[10:29:54] <ssi> I'd totally use the pico converter if it wasn't $150 per axis!
[10:29:57] <ssi> insanity
[10:30:09] <ssi> I'd sooner spin a board and reverse engineer the stuff myself than pay that
[10:32:06] <pcw_home_> probably a $1.50 CPLD and some interface hardware
[10:34:15] <ssi> that is exactly what it is
[10:34:18] <ssi> infuriating
[10:34:29] <pcw_home_> I have a universal interface (small FPGA, industrial TTL/RS-422 I/O) card coming out
[10:34:31] <ssi> I want to take this opportunity to thank you again for making nice stuff and pricing it fairly :)
[10:34:31] <pcw_home_> but probably not soon enough probably could do 4 channels
[10:34:55] <ssi> I can spin a cpld or small fpga board if I need to
[10:35:22] <ssi> I'm just wondering if I should go down that road or just try to lead everything through io and use bldc in software
[10:38:28] <ssi> PetefromTn_: I think I'm going to order a wj200-150lf
[10:38:31] <ssi> the 20hp version
[10:39:05] <ssi> I need to pull the spindle cover and verify the nameplate on that motor, make sure it's actually the 9kw version and not the 5.5kw version
[10:40:01] <PetefromTn_> that would be good at least then whatever solution we come up with for spindle orient will be common to the both of our machines.
[10:40:50] <ssi> that drive is $1100 from driveswarehouse.com
[10:42:10] <PetefromTn_> yeah mine was like $1k or slighly less I think.
[10:43:54] <ssi> I wish you'd hurry up and try the closed loop stuff so I know whether or not this drive is woth buying ;)
[10:44:09] <PetefromTn_> yeah I am such a slacker....
[10:45:01] <Tom_itx> :D
[10:45:54] <PetefromTn_> If you are in such a hurry you are MORE than welcome to drive up here and see about it yourself ;)
[10:45:57] <ssi> PetefromTn_: these red cap motors are going to make my life harder than it needs to be
[10:46:08] <PetefromTn_> why?
[10:48:19] <pcw_home_> are the Fanuc drives there?
[14:29:18] * zeeshan loves the fanuc red cap motors
[14:30:18] <zeeshan> ssi do you have all the fanuc manuals
[14:30:30] <Jymmm> zeeshan: TAKE THE BLUE PILL, err MOTOR!
[14:33:38] <zeeshan> Jymmm: haha
[14:33:48] <Jymmm> =)
[14:38:53] <SpeedEvil> I took the blue pill, now I can't put my trousers on.
[14:39:16] <XXCoder> thats why we humans invented sweatpants
[14:47:45] <Jymmm> lol
[15:20:35] <Jymmm> XXCoder: I thought sweatpants were invented my McDonalds - SuperSizeMe!
[15:31:08] <zeeshan> anyone do a lot of weld-fabrication here?
[15:33:18] <zeeshan> http://i.imgur.com/zIBOfWo.jpg
[15:33:19] <zeeshan> yayy
[15:33:21] <zeeshan> got space for the mill
[15:33:47] <jdh> paint the wall while you cna
[15:33:49] <XXCoder> yay! once you has mill, make cnc parts for me ;)
[15:34:03] <XXCoder> jdh: why? thats awesome homeshop decocation
[15:34:03] <zeeshan> XXCoder: yes
[15:34:12] <zeeshan> jdh who cares about looks
[15:34:13] <zeeshan> not me
[15:34:18] <jdh> better lighting with white walls
[15:34:28] <zeeshan> white walls = oil stains
[15:34:29] <zeeshan> :D
[15:34:58] <jdh> get rid of the car, lots of room.
[15:35:10] <zeeshan> thats not my daily driver car
[15:35:12] <zeeshan> thats my race car
[15:35:18] <jdh> s
[15:35:20] <jdh> so
[15:35:20] <zeeshan> it will be a garage queen
[15:35:29] <XXCoder> build larger garagew
[15:35:33] <zeeshan> why
[15:35:35] <zeeshan> i got enough space now
[15:35:35] <XXCoder> or seperate racecar garage
[15:36:16] <zeeshan> let me just buy a factory
[15:36:17] <zeeshan> while im at it
[15:36:18] <zeeshan> !
[15:36:35] <jdh> good idea.
[15:37:09] <XXCoder> move shop to new shop area
[15:37:31] <zeeshan> ill get a couple of mazak integrex e-ramteck v/10s
[15:37:34] <zeeshan> while im at it too
[15:38:36] <XXCoder> http://thebookofbiff.com/2012/05/16/1542-stripe/
[15:40:34] <zeeshan> http://i.imgur.com/EbjryX2.jpg
[15:40:36] <zeeshan> i need a hose reel
[15:40:45] <zeeshan> that hose drives me insane
[15:41:34] <jdh> what's the vaseline for.
[15:41:43] <jdh> nevermind, I don't need to know.
[15:42:13] <zeeshan> you've gotta keep yourself occupied while waiting for the cnc to complete its part
[15:42:16] <zeeshan> :-)
[15:44:02] <jdh> how's teh everlast?
[15:44:15] <zeeshan> works good
[15:44:29] <zeeshan> isstead of compressed air i'd use nitrogen to plasma cut
[15:44:36] <zeeshan> air really owns the edge
[15:44:43] <zeeshan> so if you try to weld on it after, you get owned
[15:45:07] <jdh> is that just a plasma? looks like an all-in-one thing?
[15:45:13] <zeeshan> just plasma
[15:45:33] <zeeshan> the red thing is another machine
[15:46:10] <jdh> I need to be independently wealthy.
[15:46:35] <XXCoder> I need it too
[15:48:46] <zeeshan> wut
[15:48:53] <XXCoder> I'd buy nice cnc machine and have fun
[15:49:05] <zeeshan> my friend called me a nerd
[15:49:12] <zeeshan> he was helping me move the air compressor
[15:49:15] <zeeshan> i shwoed him the cnc lathe
[15:49:22] <zeeshan> hes like "damn you're such a nerd"
[15:49:23] <zeeshan> :D
[15:50:01] <humble_sea_bass> some folks just dont understand
[15:50:22] <XXCoder> nerd = obessed about something
[15:50:29] <humble_sea_bass> no
[15:50:33] <zeeshan> hes a mech eng
[15:50:35] <zeeshan> he understands :D
[15:50:54] <XXCoder> lol
[15:51:04] <XXCoder> or was it geek?
[15:51:06] <zeeshan> he was just talking trash though
[15:51:08] <zeeshan> when the program ran
[15:51:13] <zeeshan> he started giggling like a school girl
[15:51:24] <zeeshan> cause hes ran the lathe when i was manual before
[15:51:34] <zeeshan> when we were fabricating parts in the past for some race cars
[15:51:48] <zeeshan> and now i guess it was funny to see it do it on its own
[15:53:15] <XXCoder> nice. :)
[15:53:36] <zeeshan> has anyone wrote a g-code program
[15:53:45] <zeeshan> which makes the steppers sing a tune?
[15:53:46] <zeeshan> haha
[15:53:48] <XXCoder> lol good one
http://thebookofbiff.com/2012/10/18/1653-masked/
[15:54:07] <zeeshan> XXCoder:
[15:54:11] <zeeshan> thats an EXCELLENT idea to scare someone
[15:54:11] <zeeshan> haha
[15:54:15] <XXCoder> yeah
[16:10:52] <Deejay> gn8
[16:15:41] <pcw_home_> zeeshan: theres daisy in the linuxcnc sample files
[16:22:02] <zeeshan> pcw_home_: will try it
[16:22:25] <sivu> phew. getting raspberry pi build of linuxcnc almost done
[16:22:30] <sivu> with gertboard driver
[16:24:57] <pcw_home_> needs rotary axis :-( I guess its 4 part harmony
[16:27:58] <zeeshan> haha
[16:28:56] <zeeshan> theres gotta be one for a lathe
[18:56:40] <XXCoder> OUCH~~
[18:56:42] <XXCoder> https://i.chzbgr.com/maxW500/5206698496/h06DEBB97/
[18:56:56] <XXCoder> Big concerete slab cut
[18:57:10] <XXCoder> I suppose they can add secret trapdoor in kitchen now
[19:01:35] <LeelooMinai> Burgler trap
[19:02:01] <XXCoder> hmm yeah some brittle wood with rug over it
[19:02:12] <XXCoder> use rug with cloud shaped graphic on it lol
[19:15:53] <Jymmm> When you need a new project for your cnc lathe...
https://www.youtube.com/watch?v=EKL6elkbFy0
[19:24:18] <zeeshan> rofl
[19:53:16] <tjtr33> funny delta robot vid, near end they use vacuum end effector to pickup a smartphone, and use it to video the machine workspace
http://www.youtube.com/watch?v=MdzefrrGBfw
[19:53:27] <tjtr33> may be an idea in that
[20:29:58] <tjtr33> i was wondering about payloads on deltabots, found Fraunhoffer had this
http://www.iws.fraunhofer.de/en/business_fields/joining/special_joining_technologies/equipment/pentapod_multifunctional_system.html it does cnc friction stir welding at up to 12kN, i suppose hard milling wont be a problem
[20:30:01] <tjtr33> it does cnc friction stir welding at up to 12kN, i suppose hard milling wont be a problem
[20:54:53] <ssi> zeeshan: have you worked with the fanuc red cap motors with non-fanuc drives?
[20:55:30] <ssi> pcw_home_: to answer your earlier question, yes I have the fanuc drives
[20:55:35] <ssi> I'm not sure if I can run them on single phase tho
[20:56:14] <ssi> my plan is to replace them with parker gemini drives
[20:57:43] <jdh> I had one gemini that would destroy any com port you hooked it up to.
[20:58:24] <ssi> onoes!
[20:58:34] <ssi> i picked up a null modem cable today to see if I can program it
[20:58:48] <ssi> the software they keep talking about in the manual, I'm assuming it's windows software?
[20:59:02] <ssi> is it possible to program those drives with linux, just in a terminal emulator or something?
[20:59:05] <jdh> yeah, you can do everything through a plain terminal program
[20:59:23] <ssi> excellent
[20:59:33] <jdh> it does checksummed up/downloads though.
[21:08:52] <zeeshan> ssi about 4 years ago
[21:08:57] <zeeshan> i can send you the manual
[21:09:00] <zeeshan> its like 500mb
[21:09:32] <zeeshan> one of the emag grinders
[21:09:38] <zeeshan> had one die
[21:09:40] <zeeshan> we had to replace it
[21:10:39] <ssi> I'd love to have the manual
[21:10:45] <ssi> I'm not sure which motor it is yet
[21:10:50] <ssi> I did get a part num for the encoder tho
[21:11:09] <ssi> https://pbs.twimg.com/media/BzDBFDrIMAARcUP.jpg:large
[21:11:25] <ssi> thing is, I'm pretty sure it's a 4-bit greycode commutation encoder
[21:11:45] <ssi> which is a fanuc proprietary tihng, and using it with regular hall-effect commutation drives is going to require some special magic
[21:12:00] <zeeshan> do you know if its a series alpha i
[21:12:01] <zeeshan> or series alpha
[21:12:03] <zeeshan> or series beta
[21:12:08] <ssi> the motor?
[21:12:11] <zeeshan> yes
[21:12:13] <ssi> not sure
[21:12:22] <ssi> I have tried to find data on that in the books and been unsuccessful
[21:12:28] <ssi> need to keep digging, or pull a motor
[21:12:41] <ssi> that pic is from the Y motor, and I can get at the cap, but the motor itself is buried 14" deep in the column
[21:13:07] <zeeshan> does it use a fanuc servo driver
[21:13:11] <zeeshan> amplifier
[21:13:18] <ssi> it's a all in one servo drive
[21:13:20] <ssi> lemme find the pic
[21:15:21] <ssi> https://pbs.twimg.com/media/BzJd_CmIAAIr9nA.jpg:large
[21:15:24] <ssi> not a great pic :/
[21:15:50] <zeeshan> itll have a part number on it
[21:15:52] <zeeshan> something like
[21:15:57] <ssi> AB something
[21:15:57] <ssi> yea
[21:16:02] <ssi> I'll have to walk over and look for it
[21:16:02] <zeeshan> a06b-6066-h003
[21:18:15] <zeeshan> try to get the servo motor number
[21:18:23] <zeeshan> should start with a06b
[21:19:14] <zeeshan> you cant miss the tag
[21:19:20] <zeeshan> its bright white or bright yellow
[21:20:04] <ssi> I just dunno if I can get to the tag on any motors without disassembling
[21:25:17] <ssi> climbed up on top to look at the Z servo, I can't find a tag on any side of it
[21:25:26] <ssi> don't see any on any visible face of the Y servo
[21:25:34] <ssi> and I'll hav eto remove bellows to get to the X
[21:25:40] <zeeshan> maybe you can decode it
[21:25:40] <ssi> got part nums off the spindle drive and servo drive tho
[21:25:45] <zeeshan> from what servo drive you have
[21:25:50] <zeeshan> based on the pinouts
[21:25:59] <zeeshan> servo drive #?
[21:26:23] <ssi> https://pbs.twimg.com/media/BzJghsDIUAACuUI.jpg:large
[21:30:17] <zeeshan> looks like they use a different drive for servos for a lathe
[21:30:21] <zeeshan> it doesnt match up wit hthat part #
[21:30:28] <ssi> lul
[21:30:32] <ssi> they have a million diffrenet drives
[21:51:40] <jdh> do the existing drivers work?
[21:51:58] <ssi> yes
[21:52:31] <jdh> wonder if you could part out the drives/servos
[21:57:51] <ssi> I can
[21:57:54] <ssi> but I want to keep the servos
[22:07:57] <pcw_home_> ebay the drives, the multichannel ones often to go for decent prices
[22:08:48] <pcw_home_> those look like PWM input vintage drives
[22:08:50] <ssi> yeah that's my plan
[22:08:58] <ssi> I'm just hoping I can use these motors
[22:09:10] <ssi> the motors ought to be pretty good once I get past the commutation issues
[22:09:19] <pcw_home_> so after 6057
[22:10:43] <pcw_home_> probably a 2500 line encoder
[22:10:54] <ssi> 3000
[22:11:16] <ssi> https://pbs.twimg.com/media/BzDBFDrIMAARcUP.jpg:large
[22:13:28] <pcw_home_> standard quadrature + 4 bit gray code commutation track
[22:13:41] <ssi> yeah
[22:13:51] <ssi> do you have access to documentation on this fanuc stuff?
[22:15:11] <pcw_home_> I have some Ive gathered but I dont know if any specifies the commutation info
[22:16:01] <pcw_home_> The commutation info is TTL level (we have one of those encoders running on a 8I21)
[22:16:26] <ssi> and the encoder inputs on the 7i77 are ttl as well, correct?
[22:16:55] <ssi> so if I spin a board, I can use a cpld and whatever interface hardware is necessary for ttl, and the rest should be software
[22:17:06] <pcw_home_> we only had three inputs so got by with the three high order ones
[22:17:27] <ssi> my goal is to use parker gemini drives with these motors, and they want hall effect inputs
[22:17:35] <ssi> so I baskcally want to do exactly what jon elson did
[22:17:46] <pcw_home_> Linuxcnc master allows you so read the A/B/Index as hal pins
[22:18:04] <ssi> what would that do for me?
[22:18:40] <pcw_home_> you can use 7I77 encoder inputs to read the grey code
[22:19:21] <pcw_home_> (they are protected so a lot safer that using raw FPGA pins)
[22:19:43] <ssi> and then regular gpio outputs to feed hall back from the bldc component to the drives?
[22:21:07] <pcw_home_> maybe, dont know what your drives expect for hall signals
[22:21:40] <ssi> umm.... "regular"?
[22:21:41] <ssi> :)
[22:21:58] <pcw_home_> I mean signal level
[22:22:08] <ssi> the drives use hall for trapezoidal commutation until they get an encoder index, then they do sinusoidal commutation based on the encoder
[22:22:12] <ssi> umm
[22:22:14] <ssi> I can find out
[22:22:52] <pcw_home_> You will have to do a bit of experimentation
[22:23:20] <ssi> naturally
[22:23:23] <pcw_home_> Asah has his working I think, so maybe has a patch for BLDC
[22:24:37] <pcw_home_> but halscope on the pins and a little scratch paper should be enough
[22:25:33] <ssi> yeah
[22:25:40] <ssi> I'm trying to gather enough info to start wiring stuff up
[22:25:43] <ssi> maybe tonight :)
[22:28:02] <ssi> The Gemini GV6 drive is designed to be used with motors that have single-ended, open collector Hall outputs. Internally, the drive pulls these signals up to +5V. The Hall effect circuit is shown below.
[22:28:32] <skunkworks> Boom!
[22:28:39] <pcw_home_> hmm for me starting a tricky project late at night is a recipe for disaster....
[22:29:14] <ssi> well if I don't get something done tonight or tomorrow, it'll be a week before I can touch it again
[22:29:23] <pcw_home_> Yeah hall signals are very often open collector
[22:29:27] <ssi> The Gemini drive uses the Hall effect inputs to synchronize the encoder with the motor’s internal magnets at the start of motion. Initial commutation is trapezoidal; once the drive establishes synchronization it changes to sinusoidal commutation based on encoder position.
[22:29:46] <pcw_home_> (same as BLDC)
[22:30:10] <pcw_home_> first Hall edge is used for sync
[22:31:50] <ssi> hm remind me though, the 7i77 outputs are sourcing only, right?
[22:32:12] <ssi> meaning they can't masquerade as open-collector hall sensors?
[22:32:35] <pcw_home_> yes they are sourcing only
[22:32:48] <ssi> that's gonna be tricky
[22:32:50] <pcw_home_> you may not want 24V either
[22:32:56] <ssi> naturalyl :)
[22:33:14] <ssi> hm how can I do this
[22:33:29] <pcw_home_> voltage divider is one way
[22:34:06] <ssi> I probably just need to get on spinning a board to do the conversion
[22:35:43] <ssi> what about bare parport? would it be a reasonable way to run simulated hall effect outputs for testing purposes?
[22:36:14] <pcw_home_> Yeah R/C filter --> 74HC14 --> CPLD --> SOT 23 MOSFET with 47 Ohm series resistor --> pullup
[22:36:31] <pcw_home_> pretty bullet proof
[22:36:44] <ssi> that'll be easy
[22:37:10] <pcw_home_> a plug in parallel port would probably work (and not series if it dies)
[22:37:17] <pcw_home_> serious
[22:38:13] <ssi> so you said I can use the '77's encoder inputs for the greycode
[22:38:29] <ssi> would I use C1 -> A, C2 -> /A, C4 -> B, C8 -> /B ?
[22:38:35] <pcw_home_> Yes (though only readable in master)
[22:39:10] <pcw_home_> no you need to set the input to TTL mode so you can only use one input per pair
[22:39:18] <ssi> ok
[22:39:24] <skunkworks> you can read greycode with the mesa encoder counters?
[22:39:45] <ssi> so I'll need A, B, Z, and A of the next one to read one set
[22:39:54] <ssi> or maybe just read the high order three like you were saying?
[22:41:44] <pcw_home_> If you are going to make a converter you might as well map out the whole thing
[22:42:11] <pcw_home_> i think Fanuc motors are almost always 8 pole
[22:42:17] <ssi> yeah I'm pretty sure it's 8 pole
[22:42:45] <pcw_home_> so the whole pattern will repeat 4 times per turn
[22:44:52] <ssi> I found a pdf on cnczone that had info on the commutation
[22:44:54] <ssi> lemme find that
[22:56:58] <ssi> http://www.prototechnical.com/~imcmahon/fanuc_commutation.png
[23:00:20] <ssi> pete
[23:00:31] <PetefromTn_andro> Yeah
[23:00:40] <ssi> what's happening
[23:00:50] <PetefromTn_andro> Watching ufc
[23:01:18] <PetefromTn_andro> You?
[23:02:17] <ssi> sitting in the hangar
[23:02:21] <ssi> contemplating fanuc commutation
[23:02:30] <PetefromTn_andro> I'm sorry
[23:02:45] <ssi> why?
[23:03:18] <PetefromTn_andro> I'm sorry your machine is so dissimilar to mine
[23:03:26] <ssi> I'm happy that it is, honestly
[23:04:29] <PetefromTn_andro> I'm sure you will get it working regardless
[23:05:52] <ssi> yeah, it'll happen :)
[23:06:06] <ssi> what do you suppose this thing will do if i hook single phase up to it as is?
[23:06:15] <PetefromTn_andro> Did you order the spindle drive
[23:06:15] <ssi> I'm guessing the control is powered only by one phase
[23:06:19] <ssi> not sure about the servo drive
[23:06:22] <ssi> no, not yet
[23:06:41] <PetefromTn_andro> No idea man.
[23:06:42] <ssi> I got 6/3 pulled last night
[23:06:50] <ssi> put a subpanel out in the hangar by the machine
[23:07:12] <ssi> this control is hilarious
[23:07:14] <ssi> it has submodules
[23:07:21] <ssi> the DIMP board, the DAMP board, and the DUMP board
[23:08:04] <PetefromTn_andro> I'm kinda surprised you didn't have to pull a permit for the elecrical
[23:08:12] <ssi> lolololololol
[23:08:25] <ssi> you obviously don't know me well
[23:08:26] <ssi> :D
[23:09:34] <PetefromTn_andro> Are you going to try to use the original control
[23:09:42] <ssi> not really
[23:09:57] <ssi> but if I can run the original control on single phase, I will try to power it up
[23:10:06] <ssi> if nothing else so that I can unpark the Z
[23:10:10] <ssi> it's still sitting on a block on the table
[23:10:58] <PetefromTn_andro> I just unbolted the z motor and kinda screwed the head up using the motor body
[23:11:37] <PetefromTn_andro> The brake held it to the screw
[23:14:09] <PetefromTn_andro> I got the second operations programmed for my prototype rail earlier while I watched the new transformer movie.
[23:14:51] <ssi> nice :)
[23:22:50] <PetefromTn_andro> Have you gotten any cleaning done on that beast yet?
[23:27:33] <Connor> ssi Your servo encoders use grey code ? Ick
