#robotics Logs

Oct 05 2013

00:01 the_fool A result of the present functionality of the Electoral College is that the national popular vote bears no legal or factual significance on determining the outcome of the election. Since the national popular vote is irrelevant, ... etc
00:07 GargantuaSauce i dont think anyone is going to contest the notion that the us' electoral system is fucked
00:07 the_fool thebear does
00:07 theBear no, i just don't care
00:07 theBear i wouldn't care if someone who wasn't acting like a baby was saying it
00:07 the_fool but you said i was delusional for thinking it's fucked
00:08 theBear no, i said you were delusional for saying you didn't understand 'worth'
00:08 the_fool ah, but the entire capitalist economy is based on that
00:08 the_fool if you don't know it's worth 5 cents, i can sell it to you for $5 and make my profit
00:09 theBear bullshit ! you been fucking mindwashed by your stupid country if you think that... they ain't got nearly as much effect as they tell you they do
00:09 the_fool what's the country got to do with the cost vs worth ?
00:10 theBear fuckoff ! i'm not gonna be fooled into talking to you with a name like that
00:10 the_fool is linus worth less than windows, because the richest person in the usa doesn't own linux?
00:11 e4016 is confused at what is goin
00:11 the_fool tv tells me i should use ThisBrand shamoo because i am worth it, but i come here on irc and you call me all sorts of degrading names!
00:11 theBear someone is acting like a big self indulgent fool is what
00:12 bigselfindulgent sorry, nick length limits
00:13 bigselfindulgent call me kat, bear
00:13 theBear fucking call yourself that and i will
00:13 Jak_o_Shadows What's with animals on the internet anyway?
00:13 bigselfindulgent i was katsmeow and you didn't callme that
00:13 theBear i been called the bear for a good 15 years before i used it on irc
00:13 Jak_o_Shadows fair enough.
00:13 bigselfindulgent i was called kat before i was online
00:14 Jak_o_Shadows bigselfindulgent: Find yourself a nickname, stick to it, that way I can alias you back to kat
00:14 Faek I misspelled Fake
00:14 theBear lol
00:14 bigselfindulgent but you spelled "misspelled" right!!
00:14 Faek Yeah, i decided quite a while ago to roll with it
00:15 bigselfindulgent it's unique :-)
00:15 Jak_o_Shadows Mine is reasonably unique as in referring to a person, but it comes from a book, so there's that.
00:16 bigselfindulgent from a .edu site : Authumn 1998: CSE590ES: Special Topics in Embedded Systems
00:17 bigselfindulgent i am trying to find " Authumn" because it was on a slide in the lecture <GargantuaSauce> https://www.youtube.com/watch?v=_9OuxecV48g
00:21 gselfindulgent gives up, looks like all typos of Au
00:33 rue_shop2 I have a lathe
00:34 rue_shop2 I dont need bearings that fit around pipes
00:34 bigselfindulgent kool, gonning to make more cogged-belt pulleys?
00:34 rue_shop2 I just need bearings bigger, and material to make collars
00:34 rue_shop2 bigselfindulgent, love for you to tell me how to make cogged belt pullies on a lathe
00:35 bigselfindulgent ok: index the head to the first , mount a mill on the carriage, lock the head still, run the mill into the round bar, and slowly run the carriage the length of the bar
00:36 bigselfindulgent when it's the right depth, sot, index the lathe chuck over to the next tooth, mill that one the length of the bar
00:37 bigselfindulgent when bar is covered in teeth, nick deeply with parting tool, then bandsaw the pulleys off the bar
00:37 chord ok guys I hate doing stuff like vegetable gardening, how can robotics do that for me
00:37 bigselfindulgent easy: cnc the tractor
00:37 chord what?
00:38 bigselfindulgent add servoes to the tractor, sit in comfy house and operate
00:38 chord ok so how do you get the robot to plant seeds
00:38 bigselfindulgent you can till, plow, plant, spray, inspect, and in some case pick, the garden, and never go out there personally
00:39 bigselfindulgent you never seen a gang row planter?
00:39 Jak_o_Shadows Poke a hole in the ground with a rod, drop seeds in, get it to stamp around hole to fill it up
00:39 chord so making a robot that does all of that is completely feasibel?
00:39 Jak_o_Shadows probably expensive, but yeah.
00:39 Jak_o_Shadows Well, you could do the basics for cheapish, but meh.
00:39 chord expensive why?
00:39 bigselfindulgent heck, you can get seeds on reels, like chips, a trencher puts them in the ground,, or you canpoke-put, or plow-dribble, or broadcast
00:40 Jak_o_Shadows Things just add up
00:41 bigselfindulgent the equipment already exists, but people would rather do it themselves than trust the wireless link, and most farmers cannot repair the servo and radio stuff, they can't wrench it or hammer it or change it's oil
00:41 GargantuaSauce >trust the wireless link
00:41 GargantuaSauce if it's remote control it's not a robot
00:41 GargantuaSauce come on
00:41 bigselfindulgent heck, using localised gps is still mostly unheard of on the farm
00:42 chord wtf where can I buy one
00:42 bigselfindulgent GargantuaSauce , gotta train is somehow, and learn the error the robot is making
00:42 bigselfindulgent one which?
00:42 chord I want to grow my own organic garden but I don't want to put in the time
00:42 chord thats what robots are meant for right
00:42 bigselfindulgent how many acres?
00:42 bigselfindulgent which lants?
00:43 bigselfindulgent organic may be difficult for most plants, since you cannot spray for bugs in an orgaic farm
00:45 chord new idea: robot that has high computer vision, SEEK OUT AND DESTROY BUGS WITH PHYSICAL FORCE
00:46 theBear http://imgur.com/r/gifs/TJB8FpH
00:46 Jak_o_Shadows *WITH FIRE*
00:46 gselfindulgent useto spend 8-10 hrs a day sometimes on a olde International like http://thumbs.dreamstime.com/z/red-farm-tractor-near-field-2334618.jpg
00:46 chord can't they build a wild cat that doesn't make so much noise
00:46 chord all of the robots that bost dynamics make ARE SO LOUD
00:46 Jak_o_Shadows theBear: I saw that. Cool as heck.
00:47 Jak_o_Shadows chord: Cause power sources suck
00:47 bigselfindulgent the hydraulics eats tons of power and run all teh time (the hopping)
00:47 bigselfindulgent the cheetah is a lot quieter, and still uses a ton of power while running
00:47 chord my favorite video is the dog slipping on ice, thats by boston dynamics too i think???
00:47 bigselfindulgent yeas
00:48 GargantuaSauce https://www.youtube.com/watch?v=wE3fmFTtP9g i am a fan of the faceplant-o-matic
00:48 bigselfindulgent tools to drag behind a tractor to automate the farm : https://www.google.com/search?q=farm+tractor+implements&client=firefox-a&hs=hL1&rls=org.mozilla:en-US:official&source=lnms&tbm=isch&sa=X&ei=LKRPUtPAN5KE9QTFsYCoAg&ved=0CAkQ_AUoAQ&biw=1097&bih=498&dpr=0.9
00:49 bigselfindulgent one person dragging some serious automation : http://en.wikipedia.org/wiki/File:Wheat_Planting_Rig_May_2007.jpg
00:50 chord i'm thinking more like small scale farming
00:50 bigselfindulgent another one person, tilling the ground, planting the seed, and fertilising it, in one pass : http://en.wikipedia.org/wiki/File:Modern_John_Deere_Tractor_IMG_0401.JPG
00:50 Jak_o_Shadows First make a robot platform that you can attach tools to.
00:50 bigselfindulgent ok, become familiar with the tools on the size you need, and drag one or more tools across the ground
00:51 Jak_o_Shadows I would think a "n" shape, wheels on the lower bits, to move up and down rows. The tool hanging down the middle.
00:51 bigselfindulgent rue made his mowerbot years ago
00:51 bigselfindulgent Jak, you mean like a corn or tobacco tractor, on stilts?
00:52 chord first how the hell do you grow an organic garden
00:52 bigselfindulgent i've seen some, you can just about park a small car under one, real unsteady
00:52 GargantuaSauce grow things that contain carbon
00:52 bigselfindulgent chord, umm, yea, figure that out first
00:53 Jak_o_Shadows sort of I think.
00:53 chord just jam the seed in the ground and add water
00:53 chord how many more complications could there be?
00:53 Jak_o_Shadows chord: If on small scale, don't worry about it, just go with it.
00:53 bigselfindulgent well, if that's all you think there is, any food you grow, the bugs will eat
00:54 chord so how do you make an organic garden that bugs don't eat
00:55 chord so you guys have no idea either...
00:55 bigselfindulgent i have ideas,
00:55 chord too narrowly focused on technology?
00:55 bigselfindulgent but it's so basic, you should just google it to get the pictures too
01:02 chord channel stopped talking why
01:03 bigselfindulgent waiting on you to learn how to grown a garden
01:04 gselfindulgent checks the temperatre on the heatsinks be
01:05 chord i'm hoping your wife would teach you so you could teach me
01:06 theBear you find her and she can teach you
01:08 chord look guys we have to admit that we can't stay locked into just computer science we have to branch out to stuff like gardening as uncomforting as it is
01:09 GargantuaSauce well we're already trolling, that's about halfway there
01:10 bigselfindulgent my wife? since when is gay marriage legal in this hellhole?
01:11 theBear the hell we do
01:11 chord what are you responding to theBear
01:11 theBear you
01:12 gselfindulgent has had a garden on the roof , whatever good it has been, for y
01:12 chord mold doesn't count...
01:12 bigselfindulgent tomatoes, beans,carrots, in 2L and 5Gal containers
01:14 bigselfindulgent which reminds me i should prolly shut off the tank refill pump
01:14 bigselfindulgent sure it's not full, but i don't want power out there later when dew hits
01:16 chord so what else can robotics automate that are crap jobs that I gotta do
01:18 chord are you guys still there?
01:23 GuShH chord: go away
01:24 theBear lol
01:44 Jak_o_Shadows half-here
01:47 Faek Ugh
03:47 Jak_o_Shadows Unsurprisingly, the expensive bits of a 3D printer are the electronics and printed parts
03:48 theBear what other parts are there ? a couple metal rods ?
03:48 Jak_o_Shadows Yeah, few scraps of wood
03:48 theBear and hopefully most of us can make the electronics from our junk box/parts stock for 'nothing'
03:49 Jak_o_Shadows Yeah, I don't see endstops and stuff, but stepper motors cost some, as do stepper motor drivers.
03:49 theBear steppers are an issue, drivers you can build with a few transistors and an avr
03:50 Jak_o_Shadows The drivers arn't actually too bad, about $6.
03:50 theBear hmm, i never seen 'em that cheap, but i also never looked
03:50 theBear i seen chips around that price, but i figure you talking about little 'modules'
03:51 Jak_o_Shadows Yeah, modules: http://www.ebay.com.au/itm/1PC-A4988-3D-Printer-Driver-Module-Reprap-Prus-StepStick-Stepper-Motor-Driver-/141037403675?pt=AU_B_I_Electrical_Test_Equipment&hash=item20d67bfe1b&_uhb=1
03:52 Jak_o_Shadows http://www.ebay.com.au/itm/L298N-Dual-Stepper-Motor-Module-Driver-Controller-Board-5V-For-Robot-Smart-Car-/390567711088?pt=AU_B_I_Electrical_Test_Equipment&hash=item5aefa65170&_uhb=1 have a bit more power somethign tells me.
03:53 Jak_o_Shadows If you're willing to dick around in firmware, you could do it all dirt cheap.
03:55 Jak_o_Shadows Also, if you had some decent tools (a drill press perhaps, a mill) you could avoid most of the plastic
03:56 theBear indeed, tho strength isn't much of an issue, just stiffness... no real force like a cutting/drilling/milling cnc
03:56 Jak_o_Shadows Yeah. I'd say wood, but wood probably swells and rubbish too much
03:58 theBear there are tricks and ways and means, but it's less than ideal
03:58 Jak_o_Shadows aye
03:59 theBear even softwood properly coated is fairly static, hardwood will hardly change at all with temp and not with moisture, IF properly coated
03:59 theBear course it's also gotta be properly dried before that
04:00 theBear and even not sealed can be pretty good, look at guitars, so long as you don't move between different climates or leave them in a hot car or such, they change VERY little over the years, and they're under HUGE tension
04:02 Jak_o_Shadows Yeah. I have some mosfet gate driver chips coming soon, I might have a go at writing PID control of temperature.
04:03 theBear mmm, i got halfway thru a project like that before i ran outta puff i dunno, sometime in the last couple years
04:04 Jak_o_Shadows I figure as long as I'm buying parts that I can use later, that'll do.
04:07 Jak_o_Shadows Hmm, thermistors arn't very expensive
04:08 theBear nah, you can also abuse all kinds of things if you building something yourself, diodes/transistors are good if noise isn't an issue for example
04:09 Jak_o_Shadows How 3D printers abuse belts hurts me.
04:09 theBear generally not much different to how 2d printers abuse them
04:10 Jak_o_Shadows One, that is a current model, uses cable ties to secure the ends..
04:15 Jak_o_Shadows lol http://www.ebay.com.au/itm/Ntc-Thermistor-/200969592018?pt=AU_B_I_Electrical_Test_Equipment&hash=item2ecab89cd2&_uhb=1
05:04 GargantuaSauce Jak_o_Shadows: the belt is secured to my x carriage with a pushpin
05:05 Jak_o_Shadows lol
05:05 GargantuaSauce i cut it like 5mm too short
05:06 GargantuaSauce felt like such a moron
05:06 Jak_o_Shadows What thermistor are you using? I want to pick one up, just to play with for now, but to use later.
05:06 Jak_o_Shadows Also, I am surprised by how much the reprap docs SUCK
05:07 theBear matches the design :)
05:08 Jak_o_Shadows Yeah, I won't argue with that.
05:09 GargantuaSauce just a jellybean NTCLG100E 100k one
05:10 uehuehue Why does the reprap suck?
05:10 Jak_o_Shadows I mean, I still want one as I see them as the most effective for me, fixing small plastic things, and making stuff.
05:11 Jak_o_Shadows It doesn't seem as if it would have good tolerances. Anywhere. The triangular design is silly I think, and yeah.
05:11 GargantuaSauce and investing the majority of your free time? :V
05:11 Jak_o_Shadows lol.
05:11 GargantuaSauce yes the threaded rod mendel is definitely....silly
05:12 GargantuaSauce the more repstrappy ones are much more rigid
05:13 Jak_o_Shadows http://www.ebay.com.au/itm/10pcs-100K-ohm-NTC-3950-Thermistors-for-Reprap-3D-printer-Mendel-Prusa-/261222791198?pt=AU_Computers_Printer_Accessories&hash=item3cd217781e&_uhb=1 Is that similar?
05:14 Jak_o_Shadows Yeah, I don't see why you'd bother with the threaded rod mendel. The box mendel looks ok though.
05:14 GargantuaSauce the ones i have are axial and much cheaper
05:15 Jak_o_Shadows hmph
05:16 GargantuaSauce http://ca.mouser.com/ProductDetail/Vishay/NTCLG100E2104JT/?qs=T%2fnZg7%2fCwxNvdVOqaQsLJQ%3d%3d
05:16 GargantuaSauce i think they are these, not certain
05:17 GargantuaSauce oh wait your link is 10 not 5. not that much cheaper then
05:17 Jak_o_Shadows I don't really need 10. I'm checking shipping on farnell and RS now
05:18 GargantuaSauce "need" is not a notion that should come into this!
05:18 Jak_o_Shadows lol.
05:19 GargantuaSauce i've been fantasizing about making an array of them on some thermally conductive substrate
05:19 Jak_o_Shadows Hmm, I wonder if TI have thermistors?
05:19 GargantuaSauce just for stupid contact thermal imaging
05:21 Jak_o_Shadows "element14 offers free delivery for all orders over the value of $45" Damn.
05:22 GargantuaSauce wellllll you should get some logic-driven mosfets too
05:22 Jak_o_Shadows For orders under the value of $45.00 our packaging, handling and delivery charge for deliveries up to 20kg is $12.95.
05:23 Jak_o_Shadows I have some gate driver chips coming tuesday, I was gonna use those with the mosfets I already have.
05:24 Jak_o_Shadows Has "RepRap" in title -> huge price increase: http://www.ebay.com.au/itm/100K-High-Stability-NTC-Thermistor-1-25mm-RepRap-Prusa-Mendel-Bed-and-Hot-End-/120977638662?pt=LH_DefaultDomain_0&hash=item1c2ad44506&_uhb=1
05:24 GargantuaSauce yup, it's a sales buzzword like arduino
05:27 GargantuaSauce it'd be nice if there were digital temperature sensing ICs that went up into the 250C range
05:29 GargantuaSauce i haven't brandished my scope at it but i imagine a fair amount of motor switching noise ends up on that ADC
05:32 Jak_o_Shadows Sort of close: http://www.ti.com/product/lm95172-q1
05:34 GargantuaSauce yeah you could do PLA with a hotend controlled using that i guess...that gets pretty close to the edge of its specs though
05:34 Jak_o_Shadows Yeah.
05:35 GargantuaSauce and it's...slightly expensive
05:36 GargantuaSauce which may be an equivalently slight understatement
05:36 Jak_o_Shadows Lol
05:47 Jak_o_Shadows Lol, Ball rollers: http://www.ebay.com/itm/Purple-360-Rolling-9-Balls-Manual-Body-Care-Legs-Comfortable-Massage-Glove-/310675481575?pt=LH_DefaultDomain_0&hash=item4855b3a3e7
05:52 GargantuaSauce_ strap it to a wrist brace and you got yourself a new extreme sport
07:42 SquirrelCZECH guys
07:43 SquirrelCZECH I have tricky question! :D
07:43 SquirrelCZECH I have carbon tubes of diameter 5/4
07:43 SquirrelCZECH and I need to cut them into pieces of exact lenght (aroun 10cm, do not have to be exactly 10cm, but SAME)
07:43 SquirrelCZECH 6 pieces
07:43 SquirrelCZECH how would you do it?
08:23 Tom_itx abrasive cutoff wheel
10:51 SquirrelCZECH fuuuuu
10:52 uirrelCZECH ordered 1 turn se
10:52 SquirrelCZECH and got 5 turn servos instead
10:52 SquirrelCZECH hmm
10:52 uirrelCZECH is afraid he have to start hacking these se
11:03 rue_house ?
11:03 rue_house you ordered carbon fiber tubes but for servos instead?
11:03 rue_house what is the tolerance on length for your tubes?
11:06 robotustra hi
11:07 robotustra hi all robot builders
11:07 robotustra how is the progress for today?
11:08 robotustra Tom_itx: are you here?
11:08 robotustra I would like to know your atom boards power consumption
11:13 Tom_itx i've never tested that one
11:16 robotustra hm
13:23 MrCurious http://web.mit.edu/newsoffice/2013/simple-scheme-for-self-assembling-robots-1004.html
13:23 MrCurious this is how stargate sg1 styled replicators start off
20:05 useless-afk Though top-secret documents leaked by Snowden show that the NSA does operate some nodes on the Tor network, it did not detail how many, and it seems that the above de-anonymizing technique actually has been used.
20:13 DagoRed that's interesting kat
20:13 DagoRed freaky, but interesting
23:20 robotustra http://en.irc2go.com/?q=belarus
23:21 robotustra http://www.youtube.com/watch?v=TtylFugOT_4
23:25 rue_shop2 ok! all 18 servo power cables are ok
23:25 rue_shop2 install them for the last(?) time!
23:40 rue_shop2 only 102 jumpers left!