#robotics Logs
Sep 05 2012
#robotics Calendar
00:00 tsmeow throws out "socratic questioning" as a side reading t
00:02 katsmeow i have a sneaky suspicion the work has already been done, on computing hardware and OSs we cannot get any more
00:03 katsmeow the reason SHRDLU wasn't expanded to the real world is because the OS and LISP was "upgraded" and no longer did as the program called for
00:03 katsmeow and the machine is no longer made
00:06 anannie wizaqua: May I PM?
00:08 wizaqua sure anannie
00:09 tsmeow wonders what they talk of that the rest of us will not learn
00:15 tsmeow wanders away s
00:21 wizaqua I dont think SHRDLU was reasoning about it's own code
00:28 katsmeow-afk SHRDLU wasn't told anything but the blocks environment
00:29 katsmeow-afk it had no input devices except the teletype and data files, there was nothing to learn from even if it was given code to find out stuff
00:30 katsmeow-afk it was like a Hellen Keller situation, but in a sense, brain damaged with no learning code to add to it's db about things
00:31 katsmeow-afk Hellen Keller had no methods of i/o either , till she was introduced (taught) sign language
00:46 katsmeow-afk ah man did i score on these heatsinks from cable boxes: they aren't steel, they're brass!
01:11 rue_house cool
01:33 katsmeow-afk rue : http://designerthinking.com/benchpsu.html#bottom <<== if you click on the middle one, you can see brass where i sawed off the heatsink tabs
01:37 katsmeow-afk http://www.bbc.co.uk/news/technology-19474829
03:26 katsmeow-afk http://imgur.com/gallery/HdsNw
03:40 katsmeow-afk http://imgur.com/gallery/STBd7
08:41 delinquentme what can be done to govern the heat a stepper motor puts off? I was of the thinking that running it at microstepping / fractional stepping would increase the heat output
08:58 rue_house delinquentme, does it already have current control?
08:59 delinquentme rue_house: I googled "current control" and all I got as "vector control"
09:00 delinquentme im not sure what current control is
09:00 delinquentme im guessing thats some hardware feature built into some stepper motors?
09:01 rue_house you apply regulated current ot hte windings
09:01 rue_house no, its part of the driver
09:01 rue_house instread of just appling voltage to the windings
09:04 delinquentme ahh ok lemme check the driver -- 1 sec
09:06 delinquentme yeah i believe .. over current protection
09:06 delinquentme http://www.pololu.com/catalog/product/1182
09:07 delinquentme I was of the thinking that simply ... when microstepping you're feeding more coils ... and holding ones at charge .. thus more energized coils == more heat
09:07 delinquentme off of the stepper.
09:08 rue_house its not overcurrent protection
09:08 rue_house its current regulation
09:09 rue_house it makes the coils respond faster when you apply a high supply voltage
09:09 rue_house but keeps them down to their rated current
09:09 rue_house toms driver has a feature where it reduces the coil current if the motor is not turning
09:10 rue_house tell us about the motor
09:10 rue_house whats the rated current
09:10 rue_house what current is the driver set to
09:10 rue_house whats the feed voltage to the driver
09:17 delinquentme rue_house: if totally necessary Ill look up all the numbers ... but how about a rule of thumb? Like the current needs to be greater than whats being pulled by the stepper to keep the heat down right?
09:20 rue_house the current the driver sends into the stepper needs to be equal to or less than the rated current for the stepper
09:21 rue_house ?
09:21 delinquentme noted.
09:21 delinquentme so like ... its untrue to assume that just bc something is microstepping
09:21 delinquentme that it will generate more heat?
09:24 rue_house if its a 4 wire stepper, then the total power dissipation is constant
09:25 delinquentme I guess that doesnt make sense to me ... I mean microstepping will run a few coils at full power and others at partial
09:26 delinquentme thus in the position of a full step ... say on every 1.8 degree ( a whole step in a 200step/rev motor ) that it would be utilizing fewer energized coils
09:26 delinquentme thus! less heat no?
09:29 rue_house erp, have to run to work!
09:31 delinquentme haha
09:31 delinquentme kk
09:36 Triffid_Hunter delinquentme: no, not that simple
09:37 delinquentme Triffid_Hunter: feel free to dissect the logic
09:37 Triffid_Hunter delinquentme: for a start, P=I^2.R. now when you're microstepping, it sometimes has one coil at full current, or two coils at 0.707 current. in both these situations, Ptotal is the same
09:38 delinquentme thats impossible.
09:38 Triffid_Hunter delinquentme: umm no because that's what actually happens
09:38 delinquentme you cant tell me that P is equal in those situations
09:38 delinquentme when one coil is at 1
09:39 Triffid_Hunter delinquentme: why not? what's 1^2*1? what's 0.707^2 * 1 * 2?
09:39 delinquentme where 2 coils X and Y thats saying P(1X) + P(.7Y) == P(1)
09:40 delinquentme exactly ... the prior is 1 .. and former is > 1
09:40 delinquentme O_o
09:40 delinquentme are you messing with me?
09:40 Triffid_Hunter delinquentme: situation 1: coil 1 is at 1x current and coil 2 is at 0x current. Assuming Imax = 1A, and R=1 ohm, P=1^2 * 1 + 0^2 * 1 = 1
09:40 Triffid_Hunter delinquentme: situation 2: coil 1 is at 0.707 and coil 2 is at 0.707. P=0.707^2 * 1 + 0.707^2 * 1 = 1
09:41 Triffid_Hunter so Ptotal remains the same over the whole microstep cycle
09:41 delinquentme HMMM
09:41 delinquentme ok
09:42 Triffid_Hunter the motor temperature above ambient is proportional to Ptotal, so if you want the motor to be at a particular temperature, simply adjust Imax in accordance with ambient temperature
09:42 delinquentme waiiiitt
09:42 delinquentme but thats only a valid case with half stepping
09:42 delinquentme coil activation in microstepping is more complex
09:43 Triffid_Hunter delinquentme: that example shows a half step, but even at 1/256 microstep, the currents in each coil still give a constant Ptotal
09:43 delinquentme I mean to have equal power in both coils for half stepping makes sense ... as the magets will be suspended between each
09:43 delinquentme hmmmm
09:43 delinquentme ok
09:43 Triffid_Hunter delinquentme: as you increase microstep level, the coil currents approach a sine wave, 90 degrees out of phase with each other
09:43 Triffid_Hunter don't think it's a simple triangle, that doesn't work
09:43 Triffid_Hunter and would give varying Ptotal over the cycle
09:44 delinquentme yeah I'm semi-familiar w power curves
09:45 delinquentme cool Triffid_Hunter thanks for the breakdown
09:48 Triffid_Hunter yw
09:48 Triffid_Hunter g'nit
09:48 Triffid_Hunter g'nite
10:22 delinquentme howdy GuShH !!!!!!!!!!!!!
10:22 GuShH hi
11:23 katsmeow-afk lowering the heat in a stepper = power the drive way down when it's stationary
11:24 delinquentme katsmeow-afk: yeah I was thinking about that
11:24 delinquentme how is that done?
11:24 delinquentme with some kind of MC controller power supply switch?
11:25 katsmeow-afk the whole point of a stepper is you make it move in a step, overwhelming the load, so it gets full power regardless, unlike a servo which would get full power only if it needs it to goto indicated position
11:26 katsmeow-afk i have seen HP-sized steppers with the paint blistering off them for 8 hour shift, and they never moved at all, where a servo would have not recieved any power at all in the same task
11:28 katsmeow-afk in a design with a stepper, i assume you mean for the stepper to move the load in steps, you make SURE the load cannot overwhelm and stall the stepper, and if that's true (use a brake?), you can either lower the pulse duty cycle or the peak current
11:29 katsmeow-afk no different than reducing power to a servo once it's in position
11:29 delinquentme Yeah so how would you lower the peak current
11:30 katsmeow-afk same way you lower current in a light bulb, or speaker, or toaster oven
11:30 delinquentme I'd assume it would be some kind of switch between the VCC for the stepper driver?
11:30 delinquentme " What do I google ? "
11:30 katsmeow-afk the stepper driver is a switch, a high frequency h-bridge switch, isn't it??
11:30 delinquentme yeap
11:31 katsmeow-afk ok, problem solved
11:31 delinquentme http://www.pololu.com/catalog/product/1182
11:31 delinquentme OHHH
11:31 delinquentme the enable / disable pin!!!!!!!
11:31 delinquentme yusssssss
11:31 katsmeow-afk http://www.google.com/search?q=stepper+motor+%22reduce+power%22+holding
11:32 katsmeow-afk i dunno how people live without any google-fu
11:37 katsmeow-afk by judicious design, you can be overdriving a motor to get speed out of it while keeping it cool just by powering it down when not moving
11:38 GuShH katsmeow-afk: I would question how most people would do their job WITHOUT google.
11:38 GuShH they would just sit there drooling on the keyboard
11:38 katsmeow-afk it's hot you can run a 1/4 mile race at 500 HP with no water in the radiator ,,, the engine ran only a few seconds and was then shut off
11:38 GuShH scratch google, remove the whole internet.
11:38 katsmeow-afk GuShH, that's what i said, i think
11:39 GuShH katsmeow-afk: but I'm going further into it, most people are not qualified for their job and they are merely copycats feeding off google
11:40 katsmeow-afk ah, like people who barely learn the buzzwords of a job, and know nothing about what the words mean
11:40 DagoRed Business majors?
11:41 katsmeow-afk yeas
11:42 DagoRed I swear business would halt as we know it if acronyms weren't accepted during most discussions.
11:42 katsmeow-afk blame the military, there's a backwards acronym for everything
11:43 GuShH ftw
11:43 katsmeow-afk from before the very first CATOBAR to the dozen new ones every day
11:45 katsmeow-afk what bothers me is the abbreviations that people take from communications like twitter, and use them formally
12:17 katsmeow-afk screwing up word searches by typing out over 600 times in a document, instead of hitting the space bar
12:17 tsmeow-afk shakes her
12:18 delinquentme find and replace katsmeow-afk ?
12:20 katsmeow-afk or use `' for "
12:20 katsmeow-afk damnit
12:25 katsmeow-afk To use
12:25 katsmeow-afk it. you also had to add another kind of knowledge ­ "advice"
12:26 katsmeow-afk :-|
13:54 GuShH interesting, all of a sudden this chinese spy cam decides to work as a webcam too... gotta love china.
13:54 GuShH otoh as a webcam it works remarkably well!
13:54 ShH gets na
13:54 GuShH time for some chat roulette
13:59 DagoRed seriously?
14:03 GuShH DagoRed: the last part? no!
14:03 GuShH the part about the webcam, yes.
14:04 GuShH DagoRed: everyone seems to be naked in chatroulette, it's a useless site.
14:07 chris_99 haha you got us worried
14:08 DagoRed yeah true
14:08 DagoRed that webcam seems pretty cool
14:12 GuShH DagoRed: it's one of those "lighter" spy cams, I wanted the keyring ones but they had no stock at the time.
14:13 GuShH cool thing is you can glue or tape them onto anything and they're cheap enough you don't have to worry about them getting damaged
14:13 GuShH also lightweight.
14:22 DagoRed Hmm... I really do need to check one of those out.
14:22 DagoRed They maybe good for some robots.
14:24 GuShH oh god, a ninja in chatroulette!
14:25 GuShH "The Lawrence Livermore National Laboratory's National Ignition Facility laser system of 192 beams produced more than 500 terawatts of power and 1.85 megajoules of ultraviolet laser light to its target. This is 1,000 times more power than the entire United States uses at any instant in time!"
14:25 GuShH neat
14:26 GuShH I bet they made some awesome popcorn out of that
14:26 GuShH http://phys.org/news/2012-08-dextrous-robotic-thumbs.html
14:39 katsmeow-afk compared to fission reactors, fusion is impossibly complicated, there's no commercial electric company that's going to duplicate the laser confinement for fusion
14:44 GuShH DagoRed: overall they're quite crappy, some aren't even 720p and others have horrible audio support
14:45 GuShH and because they've got a crappy AGC you can't muffle the mic either, it just distorts and all you get is noise
14:45 DagoRed yuck
14:45 GuShH doesn't handle loud noises well either, say a chainsaw.
14:46 GuShH very picky on the memory also
14:46 GuShH some will even drop frames using the fanciest card you can get
14:46 GuShH that's china for you.
14:51 ShH wonders how is 25% of one of two videos 6% as a tota
14:51 DagoRed still it is cheap
14:51 DagoRed hence why you bought it
14:51 ShH also wonders why youtube didn't ask him if he wanted to link his gmail account with the youtube acc
14:52 GuShH DagoRed: to make them cheaper they never populate certain decoupling caps, which makes the audio even worse as it picks up noise from the processor and other ICs
14:59 DagoRed oh yuck
16:02 leroux I'm trying to connect a Cortex Microcontroller to my mac with a A-A USB cable.
16:02 leroux Do I need any special drivers?
16:02 leroux I'm using vexctl to push code to it.
16:10 ace4016 not usually, no
16:11 ace4016 though that depends on what USB signature your MCU is going to display
16:11 leroux So, how would I check if my computer is detecting the device?
16:11 ace4016 should pop up as a connected device
16:12 leroux I'm on a Mac.
16:12 leroux It's CDC RC Controller.
16:12 ace4016 yea...you can still see what devices are connected
16:21 leroux ace4016: What software would I use to push code to the microcontroller?
16:21 leroux I'm trying vexctl, but it's for serial.
16:22 ace4016 CDC usually looks like serial on the computer
16:23 ace4016 infact...on linux and windows, iirc, most USB CDC generic controllers show up as serial ports
16:23 ace4016 i believe mac is the same way...been a while since I've done usb work on a mac
17:59 katsmeow-afk Ally Bank commercial features theatrical woman expressing love for a robot, robot disagrees
18:42 katsmeow-afk As of March 7, 2012, it contains more than 610,000 files requiring over 186 GBbytes of storage. It will continue to grow with each weekly update. Fresh downloads will require substantial amount of time.
19:02 Tom_L https://www.llnl.gov/news/newsreleases/2012/Jul/NR-12-07-01.html
19:27 katsmeow-afk without even looking at it: the 500terawatt laser discharge 3 months ago?
19:41 Tom_itx sorry
20:45 rue_house ok
20:45 rue_house how long did the terrawatt laser dscharge for?
20:45 rue_house someone making taost again?
20:52 FreezingCold I'm looking for some safety glasses to keep for awhile, I was thinking maybe Oakley M Frame's
20:54 ace4016 asian fit...didn't know they had to have a different fit
20:55 FreezingCold after reading reviews I'm thinking maybe the Oakley Radar's are better since they're bigger
20:55 GuShH ace4016: yeah, the biggest asian size is our SMALL
20:55 GuShH FreezingCold: it's a fucking safety glass, dude. do you seriously spend this much time and effort on them?
20:55 ace4016 also, oakleys seem overly priced for safety goggles/glasses
20:56 GuShH are there no other important aspects in your life?
20:56 GuShH as long as it keeps your eyes safe, that's all it has to do, period.
20:56 GuShH let me guess, you own an iphone too.
20:56 FreezingCold Nope, HTC Incredible
20:56 GuShH well you are still a barista to me!
20:56 ShH slams the door
20:56 FreezingCold GuShH: They're going to be on my face several hours every week, I'd like them to be nice
20:57 GuShH let's start with a face transplant!
20:57 FreezingCold now now, be nice -.-
20:57 GuShH lol
20:57 ace4016 lol
20:57 GuShH I don't know... most things are not deserving of so much attention.
20:58 FreezingCold I dunno, I guess I consider things more in depth than most people?
20:58 GuShH to be completely in the circle one must not only waste several hours looking up a specific product, but one must also spend a similar amount of hours writing about it, so you may feed the next IDIOT in line.
20:58 GuShH No, it's an ongoing trend.
20:59 GuShH we are focusing too much in the material things.
20:59 GuShH Ever thought what will happen once you are dead? to all those things?
20:59 GuShH You can't take them with you sir.
20:59 GuShH Deep shit huh.
20:59 ace4016 seems you could get a nicer pair than what oakley offers for less; nicer being more comfortable. seems the only reaosn to get the oakleys would be outward appearnce
20:59 ace4016 but, i could be wrong...maybe they're comfortable as shit
21:00 GuShH are they actual safer than a generic chinese goggle?
21:00 GuShH maybe it's all looks and the rest is bullshit.
21:00 GuShH happened to be the case with some goggles I got for the range, they were mostly for looks only.
21:01 GuShH you know how there are novelty motorcycle helmets?
21:01 FreezingCold ace4016: I'm just worried if I cheap out I won't be able to see crap
21:01 leroux Has anyone here used a Cortex Microcontroller with Unix?
21:01 ShH wonders how many people died wearing one of those german hel
21:01 leroux I'm trying to push the hex to it over a USB A-A cable via something other than EasyCv4.
21:02 leroux vexctl pushes with serial device but no serial device is created on my box when I connect.
21:03 ace4016 FreezingCold, won't be able to see? most glasses aren't scratch resistant unless you get the coatings or so; other than that, as long as they meet the impact requirements of the task at hand, they're all the same apart from wearer comfort level
21:04 GuShH ace4016: it must look good in the runway.
21:04 GuShH and while he stands in line at starbucks
21:05 ace4016 I'm unlucky and reqire prescription saftey glasses...or have the big bulky ones I put over my glasses...which is really not comfortable and gets smudged to shit. and because of my nose shape, it starts to obstruct my breathing....
21:05 FreezingCold GuShH: tbh I do have to wear them around college...
21:05 GuShH funny nose?
21:06 GuShH FreezingCold: will you be shooting people and such? one would wear safety glasses if so.
21:06 ace4016 i need a more recent prescription for work to give me prescription safety goggles, but I also don't wear them often as I work in the office most of the time rather than at the shops
21:06 FreezingCold No, I'm in a robotics program that has welding and pneumatic work where we have to use safety glasses
21:06 FreezingCold we also have to use them during soldering, which seems a bit silly to me but whatever
21:07 ShH eyer
21:07 ace4016 most safety glasses are a bit more stylish these days anyways
21:07 GuShH FreezingCold: depends on the soldering task at hand...
21:07 GuShH I've had flux fly off and nearly hit my eye once or twice.
21:07 FreezingCold GuShH: Yeah, I guess that could happen. Personally I've never worn any protection when I solder
21:07 leroux I'm getting into Robotics and Embedded Programming for the first time. Any books related that I should read?
21:08 GuShH leroux: all of them
21:08 leroux List a few.
21:08 GuShH If you were to limit yourself on a single book... well...
21:08 leroux Not a single.
21:08 GuShH a tiny few!
21:08 leroux Give me a few starting points and I'll find more.
21:08 GuShH let's read them all and once we're about ~85 let's talk about robotics!
21:09 FreezingCold Random question, what do you guys think of robotic college programs? Useful? I started mine this week
21:09 FreezingCold It's a four semester program (so like a year and a half including the summer)
21:09 leroux GuShH: I hope not to do that...
21:10 leroux http://personalpages.tds.net/~jwbacon/vex.html
21:10 GuShH FreezingCold: http://upload.wikimedia.org/wikipedia/commons/thumb/0/03/US_Navy_030121-N-6651N-003_using_a_needle_gun_to_removes_layers_of_paint.jpg/800px-US_Navy_030121-N-6651N-003_using_a_needle_gun_to_removes_layers_of_paint.jpg
21:10 GuShH not stylish enough?
21:10 leroux I found this guy's openvex api and tools for pushing the hex to the device...
21:10 ace4016 FreezingCold, is it a degree or what?
21:10 GuShH aside from welding in such places, using a needle gun is about the worst thing ever.
21:10 FreezingCold ace4016: diploma
21:10 leroux GuShH: What OSs do you work with?
21:11 GuShH whatever you throw me!
21:11 leroux Okay, freebsd/mac.
21:11 ShH pa
21:11 GuShH not mac.
21:11 leroux Then just think of it as freebsd.
21:11 leroux I used freebsd on my desktop for 2 years and still run it on my server's for work.
21:11 leroux servers*
21:12 GuShH ok?
21:12 ace4016 FreezingCold, i hope itss 1) accredited 2) general enough to get a job outside of robotics as robotics isn't taht big of a field. If they're doing Mechanical Engineering or Electrical Engineering with a specialization/concentration in robotics, that might be ok. if not and it's just a degree in Robotics...sounds really useless as a degree, and you could probably learn more on your own
21:12 leroux I'm just asking you about the vex...
21:12 GuShH sex? wrong channel.
21:12 leroux ...
21:13 leroux Vex Microcontrollers.
21:13 FreezingCold ace4016: Yeah, it's accredited (big public college). It's actually more general than I wanted, it's even called electro-mechanical engineering officially
21:13 GuShH Mex? I'm OK with the Mexicans... As long as they're OK with me.
21:13 leroux 0.0
21:13 leroux Okay, this place must be a joke.
21:13 orlok here its "Mechatronics"
21:14 GuShH oops
21:14 FreezingCold nice ragequit there leroux
21:14 GuShH Hello leroux
21:14 leroux Thanks. =)
21:14 GuShH I ragequit once.
21:14 leroux Mhm.
21:14 GuShH it was a cold night...
21:14 leroux Mhm.
21:14 ShH hands leroux a d
21:14 leroux Sorry, underage.
21:15 leroux And I don't drink.
21:15 ace4016 FreezingCold, ah, that's not a robotics program then :P
21:15 GuShH It could be any drink
21:15 leroux I assume.
21:15 GuShH Maybe just lemonade
21:15 leroux assumed*
21:15 leroux Okay, dream-drink.
21:15 ace4016 in this day and age, most things are both strongly electrical and mechanical, so it makes sense...
21:15 orlok leroux: They appear to be a standard microcontroller with a pile of stuff added on.
21:15 FreezingCold ace4016: well... It's also labeled robotics :P Sadly it's a technician program, we don't touch much math
21:15 ace4016 robotics woudln't be a bachelors degree though
21:15 GuShH orlok's answer reminds me of adventure games
21:15 leroux orlok: What would be a method to interface with it w/o using propietary software?
21:16 FreezingCold ace4016: yeah it's community college (2 years)
21:16 ace4016 FreezingCold, ah...so not engineering; it's an engineering technologies program
21:16 leroux I do have licenses for easyC.
21:16 FreezingCold exactly
21:16 leroux But my programming environment is very...unique I guess.
21:16 orlok leroux: Apparently its a PIC.
21:16 FreezingCold I'm thinking of doing electrical engineering at university after
21:16 ace4016 for tech work, sounds fine; if you wanted an engineering degree though, doesn't count for much
21:17 orlok leroux: I dont know, i dont use PIC's
21:17 leroux GuShH: Go on. I'm here to listen to that story of yours.
21:17 FreezingCold yeah, I guess it'll just be good practice. I'm doing this instead of high school, so I guess I'm ahead
21:19 leroux Ooh. mulvane's here.
21:23 GuShH leroux: you'll need to send me a bitcoin first
21:23 leroux I only have 0.514 BTC.
21:23 leroux Sorry.
21:25 leroux GuShH: Did you mine back when the difficulty was super easy?
21:26 GuShH never cared for it
21:26 leroux Ookay. Seems like I need to install the PL2303 drivers for mac...
21:27 leroux The third-party one I installed isn't working I guess.
21:39 rue_livingrm I cant work on the 3d printer if I'm fighting to stay awake
21:39 leroux rue_livingrm: Are you building it from scratch?
21:40 rue_livingrm no, 90%
21:40 leroux Ahh, okay.
21:40 rue_livingrm I got a frame plastic kit
21:40 leroux What the $?
21:40 rue_livingrm I'm at $300 for far, but $100 is 2 rolls of plastic
21:40 leroux Yeah, that plastic is expensive...
21:41 leroux Though you get alot of it.
21:41 rue_livingrm I scratch built the head, if it works I save $100
21:42 Tom_itx 12vdc, 4 phase unipolar 3.6 deg per step
21:42 Tom_itx if not i'll send ya one
21:43 rue_livingrm 3.6!?
21:43 Tom_itx http://www.ee.iitb.ac.in/~teesa/presentations%20lectures%20workshops/electrified/Stepper%20Motors%20Control.html
21:43 leroux http://cubieboard.org/
21:43 Tom_itx yeah 3.6
21:44 Tom_itx probably made dividing sectors easier?
21:45 Tom_itx 5mm shaft
21:46 rue_livingrm 3.6 isn't nice
21:46 rue_livingrm but its more than ok for a Z feed
21:46 m_itx throws them back in the box with v
21:46 leroux What do you guys use for modelling objects?
21:46 leroux I heard of some language called Open* something.
21:47 Tom_itx open scad
21:47 Tom_itx and it sucks
21:47 leroux Yeah, that one.
21:47 leroux xD
21:47 leroux So, what's the popular one nowadays?
21:47 Tom_itx open scad
21:47 Tom_itx and it sucks
21:47 leroux OpenSCAD is what we're testing out in our robotics teams.
21:47 leroux =\
21:47 leroux Couldn't we use Octave?
21:47 Tom_itx solidworks
21:48 Tom_itx acad inventor
21:48 Tom_itx so rue_house at least i can use this one to model my extruder drive
21:49 rue_livingrm is it gui?
21:49 rue_livingrm or still stupid script?
21:49 Tom_itx still stupid
21:50 Tom_itx so rue_livingrm
21:50 Tom_itx how's the wiring on a 5 wire stepper?
21:51 leroux What are the cool competitions to attend now?
21:51 rue_livingrm 1 common, 4x phases
21:51 leroux Our team is involved in BEST and FIRST.
21:52 rue_livingrm best?
21:52 Tom_itx rue_livingrm, so i can't rewire it for parallel bipolar?
21:53 rue_livingrm no
21:54 Tom_itx so i may as well shitcan these?
21:56 rue_livingrm na
21:56 rue_livingrm but 3.6 5 wire isn't good for a lot
21:56 Tom_itx you think it's strong enough to feed the filament?
21:56 Tom_itx i kinda have my doubts
22:30 rue_livingrm hmm
22:30 rue_livingrm I dont think you want steps that large
22:30 rue_livingrm unless you give it extra gears
22:32 Tom_itx no this design is direct drive. i should look for something with more torque
22:32 Tom_itx or rethink the whole thing
22:32 GuShH Tom_itx: why not half step it?
22:32 Tom_itx any stepping will lessen the torque
22:33 GuShH you need high torque for this?
22:33 Tom_itx especially on cheap drivers
22:33 Tom_itx not real high but i doubt it has much to begin with
22:33 Tom_itx original ibm floppy stepper?
22:33 GuShH no, it's not a question of the drivers, half stepping is inherently going to give you less torque
22:33 orlok i wonder if anybody has converted a 3d printer to a 3d scanner
22:33 GuShH I like how everyone always says "use gears"
22:34 GuShH because that's so trivial!!
22:34 GuShH everyone owns a friggin lathe eh.
22:34 ShH walks
22:34 Tom_itx 'at's right sucker :)
22:36 GuShH yeah well! turn on this! <flash>
22:37 Tom_itx mine's pretty worn out though
22:38 Tom_itx did you see the drive wheels i made?