#robotics Logs
Apr 20 2017
#robotics Calendar
12:06 AM * anniepoo has coated the snail with acrylic medium and microballoons
12:09 AM Tom_itx: awesome
12:09 AM Tom_itx: the mold or the part from the mold?
12:11 AM zhanx: anniepoo: i saw the renders, any updated pics?
12:16 AM anniepoo: hang on
12:16 AM anniepoo: http://partyserver.rocks/anniepoo/shellLOMpic.jpg
12:17 AM anniepoo: that's now got a layer of plaster cloth on it, and a layer of acrylic medium+microballoons
12:17 AM anniepoo: and I'm waiting for it to dry
12:18 AM anniepoo: gets another layer, then sanded down, then waxed,
12:19 AM anniepoo: then covered with paper mache to make a mold.
12:19 AM anniepoo: no, nvm, forgot the Kevin method
12:19 AM anniepoo: so, covered with fiberglass
12:20 AM anniepoo: with a slit left so I can get the fiberglass shell off
12:20 AM anniepoo: then fiberglass in the slit, sand down, and gel coat
12:20 AM anniepoo: 8cD
12:20 AM ace4016: snailbot?
12:23 AM anniepoo: 8cD snailbot!
12:26 AM ace4016: cool :)
12:29 AM anniepoo: Pomatia the snail. She's going to be a snaily friend to children 8cD
12:39 AM anniepoo: I'm getting bored with working on the shell, it feels like it's been a long process. Even though it's finally actually moving forward
04:43 AM Snert: hard to tell how big it is. Maybe about 1 foot long?
04:43 AM Snert: or is it larger.
06:11 AM z64555: its a fairly large snail, it's been designed so that a kid can sit on it
07:53 AM SpeedEvil: anniepoo: you have now made me think of a robotic noo-noo.
07:53 AM SpeedEvil: (vacuum cleaner from the teletubbies)
08:49 AM rue_bed: dontt think I'v seen that one... dont want to know
08:53 AM SpeedEvil: https://vignette3.wikia.nocookie.net/telletubbies/images/9/91/Noonoo_%281%29.jpg/revision/latest?cb=20120709215219
09:24 AM rue_house: no, I dont want to know
11:56 AM veverak: any tips for small rotary encoders except poteciometers?
12:06 PM deshipu: hall sensors?
12:07 PM veverak: hmm, afraid that won't do trick... or maybe
12:07 PM veverak: deshipu: guys at local hackerspace are working on brushless motor driver with encoder
12:07 PM veverak: realized that you can cheaply buy worm wheel plastic gears ....
12:07 PM veverak: relatively cheap BLDC motors
12:07 PM veverak: :)
12:08 PM veverak: *BLDC
12:08 PM veverak: relatively cheap drivers for these motors
12:09 PM deshipu: veverak: you put a magnet on the shaft, and you put one of those hall sensors that detect rotation next to it
12:09 PM deshipu: veverak: it's pretty precise
12:10 PM veverak: 45 degress ? ~ 8 steps per rotation?
12:10 PM veverak: hmm
12:12 PM deshipu: no, there are better ones
12:12 PM veverak: cool
12:14 PM veverak: I see
12:14 PM veverak: hmm
12:15 PM deshipu: you basically place the magnet right on top of the chip, and the chip gives you the angle
12:15 PM deshipu: it's nice, because the moving parts don't touch, so no wear :)
12:15 PM veverak: yeah
12:16 PM veverak: deshipu: really thinking about building one leg with BLDC motors/encoders and stuff
12:16 PM deshipu: I have a whole box of those tiny steppers for camera lenses
12:16 PM deshipu: I haven't tried driving them yet
12:17 PM deshipu: would be cool to even make a tiny wheeled robot with them
12:17 PM deshipu: the size of a wemos d1 mini :)
12:18 PM veverak: :D
12:18 PM deshipu: make a shield with wheels and a h-bridge
12:19 PM deshipu: which reminds me that I should order some wheels
12:23 PM veverak: :)
12:25 PM deshipu: done
12:32 PM veverak: http://makezine.com/2009/02/24/how-to-diy-quadrature-encoder/
12:46 PM deshipu: that's not what I had in mind
12:50 PM deshipu: more like this: https://hackadaycom.files.wordpress.com/2012/02/hall-effect-controls.jpg
12:50 PM veverak: do you have more details?
12:50 PM * veverak can't find proper thing
12:51 PM deshipu: https://www.rls.si/rmb28-magnetisches-drehgeber-modul
12:51 PM deshipu: stuff like this
12:52 PM deshipu: http://electronicdesign.com/analog/rotary-encoder-delivers-precise-positioning-harshest-environments
12:54 PM veverak: https://hobbyking.com/en_us/qav1806-2300kv-ccw.html
12:54 PM veverak: I suppose I can directly sense motor
12:54 PM deshipu: that is also an option
12:54 PM deshipu: some drivers have that built in even
12:55 PM veverak: deshipu: thanks
12:55 PM veverak: now I know what to google
12:56 PM veverak: hmm
12:56 PM veverak: I don't need to sense rotation of motor shaft
12:56 PM veverak: so, can't use motor magnets, have to add some on the main wheel
01:30 PM veverak: ok, so BLDC motor, plastic gears, hall effect sensor ~ done
01:30 PM veverak: BLDC driver, of course
02:17 PM veverak: 3 $ driver, 3 $ hall sensor, 1 $ gears, 10$ motor
02:18 PM veverak: 17$ per set
02:18 PM veverak: nah, that's almost dynamixel price
02:35 PM Snert_: without the dynamixel quality too
02:42 PM veverak: yep
02:52 PM anniepoo: the teletubbies vacuum cleaner's scary
02:56 PM anniepoo: started sanding shell, discovered some thin spots, applied another coat of joint compound
04:51 PM jandor_: phew
04:51 PM jandor_: i need a break
05:10 PM jandor_: @anniepoo
07:31 PM anniepoo: hey jandor
07:31 PM anniepoo: whats up
07:33 PM Tom_itx: too late
07:33 PM Tom_itx: how long have you been working on this project of yours?
07:34 PM anniepoo: which project?
07:35 PM anniepoo: the snail?
07:35 PM anniepoo: since early december or so
07:35 PM Tom_itx: yeah
07:35 PM zhanx: anniepoo: any more updated pics?
07:35 PM anniepoo: hang on
07:36 PM zhanx: i know you did something to that shell.
07:36 PM anniepoo: couple days old,
07:36 PM anniepoo: yes
07:36 PM anniepoo: let me go take a new pic
07:36 PM zhanx: this gives me a directory listing so http://partyserver.rocks/anniepoo/ let me know when its up and i can refresh it
07:38 PM anniepoo: took an instagram
07:40 PM anniepoo: https://scontent-sea1-1.cdninstagram.com/t51.2885-15/e35/18011314_442044952795194_1963041908175405056_n.jpg
07:40 PM anniepoo: that work for you?
07:40 PM zhanx: yep
07:40 PM zhanx: so thats a mold now?
07:40 PM anniepoo: when it's sanded down, it'll get fiberglass covered
07:40 PM zhanx: k
07:40 PM anniepoo: waiting now for the spackling to dry
07:41 PM zhanx: plaster over cardboard should work good
07:41 PM anniepoo: it's solid feeling
07:41 PM anniepoo: it's actually fairly heavy
07:41 PM zhanx: nice
07:41 PM zhanx: you hand cut the cardboard?
07:41 PM anniepoo: no
07:42 PM anniepoo: designed in Blender
07:42 PM anniepoo: then slided with Autodesk 123D
07:42 PM anniepoo: s/slided/sliced/
07:42 PM zhanx: k
07:42 PM anniepoo: then cut out on laser engraver
07:43 PM zhanx: was thinking of making a hot wire foam cutter this weekend but, it just got booked up
07:43 PM anniepoo: I won't be roboting this weekend
07:43 PM anniepoo: I'm in a game jam
07:45 PM zhanx: ?
07:45 PM anniepoo: Ludum Dare 38 starts 6pm tomorrow
07:46 PM anniepoo: I'm in Team Dead Muffin
07:46 PM anniepoo: 72 hours to make a game
07:46 PM zhanx: i google it, looks cool
07:47 PM ferdna: hello all
07:47 PM ferdna: robotics people!
07:47 PM * zhanx hides
07:48 PM ferdna: anniepoo, hi!
07:49 PM anniepoo: hi ferdna
07:49 PM ferdna: :)
07:50 PM anniepoo: ludum dare's the worlds biggest game jam
07:50 PM ferdna: ?
07:50 PM zhanx: looks fun
07:50 PM zhanx: https://ldjam.com/
07:50 PM ferdna: that looks super cool
07:51 PM zhanx: anniepoo: can i get the slices of the shell? I think it would be fun to make it as a rc cover
07:51 PM anniepoo: sure
07:51 PM zhanx: my kids are the prefect age for it
07:51 PM anniepoo: email me at annie@theelginworks.com
07:51 PM anniepoo: I'll email you the slices
07:51 PM anniepoo: Awww... maybe Pomatia will have a sister!
07:52 PM anniepoo: actually, even better
07:52 PM anniepoo: I'll just check them into git
07:52 PM zhanx: ok emailed
07:52 PM Tom_itx: probably not the best idea to post an email here... i'd spell it out personally
07:53 PM zhanx: I got boys that snail might end up called Gary
07:53 PM Tom_itx: that way bots won't get ahold of it
07:53 PM anniepoo: lol - at this point so many bots have my email it makes no difference
07:53 PM anniepoo: ooh, then Pomatia can have a boyfriend
07:54 PM zhanx: lol sure
07:54 PM anniepoo: E8cD
07:55 PM zhanx: if i make one its gonna be a mold so i can make 2 or more
07:55 PM zhanx: you got mail anniepoo
07:55 PM anniepoo: =8cO if I can figure out a simple frame, maybe we'll put it out as a kit
07:58 PM anniepoo: I considered vacuum forming shell
07:58 PM anniepoo: but didn't feel like making a vacuum former for a one-off
07:59 PM anniepoo: sending being slow
07:59 PM zhanx: i got it
07:59 PM anniepoo: ah, yahoo's crappy email client just didn't figure it out
08:02 PM jandor_: how goes it?
08:02 PM anniepoo: hey
08:02 PM anniepoo: so, waiting for snail to dry
08:03 PM anniepoo: was thinking I might start setting up snail software.
08:03 PM zhanx: crap out of ink for the printer :(
08:03 PM anniepoo: 8c/
08:04 PM anniepoo: to make it come out right, you have to use material .155 inch thick
08:04 PM zhanx: k
08:04 PM jandor_: I was messing with gazebo models all day
08:04 PM anniepoo: at the original 600 x 900mm size
08:05 PM anniepoo: there's a square that size around each one
08:05 PM anniepoo: 1mm = one autocad unit
08:09 PM zhanx: well everything is labeled good so i should be able to make it easy
08:10 PM anniepoo: when you make the stack, with the pieces showing the side where the numbers are right way round, not reversed
08:10 PM anniepoo: then the highes number goes on top
08:10 PM zhanx: k
08:10 PM anniepoo: get a couple lengths of 1/4" dowel or something
08:10 PM zhanx: but why .155 thickness?
08:11 PM anniepoo: if it's thicker or thinner, the shell won't be round
08:11 PM anniepoo: it'll be elliptical
08:11 PM zhanx: why not .125 or .250? to make it standard sizes?
08:11 PM anniepoo: because .155 was what my cardboard was
08:12 PM zhanx: oh ok that worls
08:12 PM zhanx: works
08:12 PM anniepoo: we cut a lot of cardboard
08:12 PM anniepoo: literally have a palette of it
08:12 PM zhanx: i bet
08:15 PM anniepoo: pallet
08:16 PM zhanx: i read typos
08:16 PM zhanx: :D
08:17 PM zhanx: had to toss 4 pounds of chicken on for salad tomorrow
08:18 PM anniepoo: I bought a second microSD
08:18 PM anniepoo: so I can start working on snail software
08:18 PM zhanx: nice
08:19 PM zhanx: is it more animatronics or robot?
08:19 PM anniepoo: the snail?
08:20 PM anniepoo: I'm not sure how you define that distinction.
08:20 PM anniepoo: It's driven by servos and software, rather than, say, a bunch of cams
08:21 PM cnnx: hi
08:21 PM cnnx: anniepoo: hows your snail?
08:21 PM zhanx: found a cheap lidar if that would help
08:22 PM ace4016: clearly coming along slowly :P
08:22 PM ace4016: possibly at a snails pace :D
08:22 PM cnnx: hey ace4016
08:22 PM anniepoo: lol
08:22 PM anniepoo: yes, but it's coming along!
08:22 PM anniepoo: the big gap was basically me learning blender
08:23 PM anniepoo: so I've been working steadily at it, but it's a spare time activity
08:23 PM cnnx: so initially i wanted to build a powerfull outdoor solar robot.. but its out of my economic reach, so I thought I could build a smaller one, can someone show me an example of a robot chassis+motors+motor controllers+wheels that can carry 20-25lbs about?
08:23 PM cnnx: anniepoo: good
08:23 PM anniepoo: that process is over
08:23 PM zhanx: http://www.ebay.com/itm/Neato-BotVac-Vacuum-Series-LIDAR-sensor-new-original-parts-/162453049593
08:23 PM zhanx: works out to 6 meters
08:24 PM anniepoo: the shell's being made, I just posted latest pix
08:24 PM anniepoo: https://scontent-sea1-1.cdninstagram.com/t51.2885-15/e35/18011314_442044952795194_1963041908175405056_n.jpg
08:25 PM zhanx: anniepoo: I want to use a lidar and the snail as the platform. now just need to get my wife on board with tit
08:25 PM zhanx: tit
08:25 PM zhanx: damn
08:25 PM zhanx: it
08:25 PM anniepoo: i read typos
08:26 PM cnnx: guess no one cared about my question :(
08:29 PM anniepoo: cnnx, not that I don't care, but that I don't have a good answer
08:29 PM cnnx: anniepoo: ok :)
08:29 PM rue_house: hey! a picture!
08:29 PM cnnx: mrdata-: hi, or should I say hi in binary "1"
08:29 PM anniepoo: if you can find a used childs electric ride-in toy, that might make a good basis for a robot to carry 25 lbs
08:29 PM rue_house: ann:i suspct you rd what ppl are thin and nt what they say
08:29 PM cnnx: anniepoo: too expensive
08:29 PM mrdata-: cnnx, i am fully versed in common protocols
08:33 PM cnnx: mrdata-: i asked this question before you came in but no one had an answer, i'll paste it again for you
08:33 PM cnnx: so initially i wanted to build a powerfull outdoor solar robot.. but its out of my economic reach, so I thought I could build a smaller one, can someone show me an example of a robot chassis+motors+motor controllers+wheels that can carry 20-25lbs about?
08:34 PM mrdata-: cnnx, do you know how to weld?
08:34 PM cnnx: mrdata-: a bit but i prefer a made solution so i can focus on the comms,navifation,software,programming
08:34 PM cnnx: navigation
08:34 PM mrdata-: how much you can carry will depend on rolling resistance, and slope of the terrain
08:34 PM cnnx: right.. just average values
08:35 PM cnnx: a general backyard robot
08:35 PM cnnx: flat grass terrain
08:35 PM cnnx: with pneumatic wheels
08:35 PM mrdata-: so generally to reduce rolling resistance, large-ish wheels and bearings are used
08:35 PM cnnx: ok
08:35 PM mrdata-: then depending on how much power you can afford, you use gears
08:36 PM cnnx: im looking on robotshop.com but all they have is 5lbs payload
08:36 PM cnnx: it needs to support a mini solar panel
08:36 PM mrdata-: so plan for 1 sq ft of solar panel equals 10 watts (ish)
08:36 PM cnnx: maybe 1 foot by 1 foot
08:37 PM cnnx: i already own a usb cellular modem i can re-activate for 10$/month
08:37 PM cnnx: so i'm hoping that will wrok with the raspberry pi raspbian
08:37 PM mrdata-: so decide how many drive wheels and what transmission
08:38 PM cnnx: 4 wheel drive
08:38 PM mrdata-: okay
08:38 PM mrdata-: how to steer
08:38 PM cnnx: using a custom C program I will write
08:38 PM cnnx: to control the motor controllers
08:38 PM cnnx: serially
08:38 PM mrdata-: mechanically how
08:39 PM cnnx: oh
08:39 PM cnnx: just forward/reverse
08:39 PM cnnx: not sure what you mean
08:39 PM cnnx: shaft
08:39 PM mrdata-: how does it turn
08:39 PM cnnx: into the hub
08:39 PM cnnx: into the wheel
08:39 PM cnnx: one side goes back
08:39 PM cnnx: one side goes right
08:39 PM cnnx: turns
08:39 PM mrdata-: okay
08:39 PM cnnx: inverse rotation i mean
08:40 PM mrdata-: so if wheels are parallel, then it slips a bit but on grass maybe thats okay
08:40 PM cnnx: i dont think its legal here in montreal,canada to drive it on streets and sidewalks
08:40 PM cnnx: cause i want to control it indoors from my control center
08:41 PM cnnx: but only in the backyard
08:41 PM mrdata-: okay
08:41 PM z64555: FIRST robotics competition in Houston, Tx was fun to watch today
08:41 PM mrdata-: cnnx, so consider repurposing a shopping cart
08:41 PM mrdata-: it will hold lots of payload
08:42 PM z64555: hmm. but he said grass. Would have to use a different set of wheels/casters
08:42 PM z64555: The frame itself could be still used, though
08:43 PM z64555: sorry to steal your thread, you can have it back :P
08:43 PM malcom2073: old powered wheelchair could work, they're pretty popular for building outdoor robots
08:43 PM cnnx: http://www.robotshop.com/en/cherokey-4wd-arduino-mobile-platform.html
08:44 PM cnnx: like i said i want someday ready made
08:44 PM cnnx: i can add wood for the container
08:44 PM cnnx: or steel
08:44 PM z64555: and of course there's R/C toys you can use if you want to build small
08:44 PM cnnx: but the chassis has to be pre-made
08:44 PM z64555: Don't have many fabrication tools at home, I take it?
08:44 PM malcom2073: I need to find a wheelchair platform one of these days, I need a powered cart
08:44 PM cnnx: some
08:44 PM mrdata: sorry disconnected
08:45 PM cnnx: i have a drill press
08:45 PM cnnx: a jigsaw
08:45 PM z64555: that's a good one to have, yes
08:45 PM cnnx: the circular saw that goes down (stationnary)
08:45 PM anniepoo: you can make a lot with those
08:45 PM z64555: Ok, so you can't really do any welding, just cutting, drilling, and bolting
08:45 PM cnnx: and this reverse jigsaw thing on a table
08:45 PM z64555: that's also a jigsaw
08:46 PM anniepoo: cnnx - some car starter motors have an inside bearing
08:46 PM mrdata: ok
08:47 PM z64555: I'll let the pros take it from here. :D
08:47 PM anniepoo: most have outside bearing, but some it's inside, you can strip off gear on end and have nice motor cheap
08:47 PM anniepoo: naw, sorry z
08:47 PM z64555: I'll quip in with a confusing remark now and then which may or may not be helpful
08:47 PM mrdata: this might interest you, discussion of stuff that handles 100lb payload http://www.robotshop.com/forum/post-p114177
08:47 PM cnnx: thats me
08:48 PM cnnx: i posted that
08:48 PM anniepoo: cnnx - ultimately, it's sort of remarkable that any of us can do this at all
08:48 PM cnnx: look at the poster nickname
08:48 PM anniepoo: making a robot does depend on having certain capabilities
08:48 PM cnnx: 3 years ago
08:48 PM mrdata: here are some chassis, http://www.robotshop.com/en/andymark-en.html?dir=desc&order=price
08:48 PM cnnx: anniepoo: i already built one, i have an indoors robot
08:48 PM cnnx: cost me 2000$
08:48 PM anniepoo: =8cO
08:48 PM mrdata: seems pricey
08:49 PM cnnx: http://www.robotshop.com/en/lynxmotion-aluminum-a4wd2-rover-kit.html
08:49 PM cnnx: this can carry 4lbs
08:49 PM cnnx: and its cheap 4wd
08:50 PM mrdata: some guys here are converting a car seat into a baby carriage
08:50 PM anniepoo: rue, did you see my pm
08:53 PM mrdata: cnnx, ok so what is the maximum slope of your yard
08:54 PM zhanx: circular saw that goes down and is stationary? you mean radial arm saw? or miter saw?
08:54 PM cnnx: miter
08:54 PM zhanx: with clamps you can make fun stuff with it
08:55 PM cnnx: its just a ryobi
08:55 PM cnnx: nothing fancy
08:55 PM zhanx: mine is a used delta nothing fancy either
08:56 PM mrdata: cnnx, so armed with the slope of your yard, you can calculate the torque needed for the motors
08:56 PM mrdata: is it mostly flat?
08:56 PM cnnx: yeah i know htere's online calculators for that
08:56 PM cnnx: sure
08:57 PM z64555: "online calculators for that" thats boring and lazy at the same time
08:57 PM z64555: I love it
08:59 PM mrdata: sure, so if the yard drops at most 1 m vertical in 10 m horizontal, then you have 10% grade; which will produce a rolling force due to gravity; your wheel size then translates to torque right there
08:59 PM mrdata: add fuzz for rolling resistance
09:00 PM mrdata: then given torque and motor power, you can calculate how much gearing
09:02 PM mrdata: so if you want to carry 25 lb, then budget another 25 for the frame, transmission, and motors
09:05 PM mrdata: we'll say 25 kg; which gravity converts to 25*9.8 = 245 newtons; on a 10% grade this is 24.5 newtons; if wheel radius is ... what? small bicycle wheels? or smaller???
09:06 PM mrdata: if radius is 300 mm, then torque due to gravity might be 7.35 newton meters?
09:07 PM mrdata: substitute actuals
09:09 PM z64555: rule of double
09:09 PM z64555: yeah
09:50 PM codepython7771: Has anyone played with T-motor U7 or U8 here? - perhaps someone knows a better price/perf motor for drones?
09:59 PM robotustra: hi
10:01 PM codepython7771: hi robotustra
10:02 PM mrdata: cnnx, http://www.globalindustrial.ca/p/material-handling/hand-trucks-dollies/hand-trucks-aluminum/universal-pneumatic-10-hand-truck-wheel-kit?infoParam.campaignId=T9F&gclid=CLqIufrAtNMCFY-3wAodzVUMaw
10:02 PM mrdata: these wheels are 10 inch dia
10:04 PM codepython7771: I wish these wheels had good mounts for motors :)
10:05 PM robotustra: print the mount for motor
10:05 PM robotustra: I did for my wheels
10:07 PM robotustra: http://imgur.com/TCWhsx1
10:07 PM robotustra: http://imgur.com/mqnAdpb
10:08 PM robotustra: http://imgur.com/79BTHVI
10:08 PM z64555: What material?
10:13 PM codepython7771: robotustra: isnt that torque going to kill that print?
10:13 PM codepython7771: robotustra: you are using a gear? I would like it directly mounted to the motor
10:14 PM codepython7771: SpeedEvil: ping
10:15 PM SpeedEvil: ?
10:15 PM mrdata: robotustra, looks great but that will break
10:16 PM mrdata: guys here say the chassis mount has to be metal
10:16 PM SpeedEvil: Doesn't have to be.
10:16 PM SpeedEvil: Has to be strong enough.
10:17 PM codepython7771: SpeedEvil: you were trying to play with hoverboard wheels - did you ever get a chance?
10:17 PM SpeedEvil: Not got to the top of my stack yet alas
10:18 PM codepython7771: SpeedEvil: I got some time to play with it recently - so used a vesc to control it - am having problems though
10:18 PM codepython7771: SpeedEvil: have you ever used vesc?
10:18 PM codepython7771: mrdata: I think with the right gearing, it might work
10:19 PM codepython7771: mrdata: note that his weight is all on metal - he is just rotating it using the 3d printed gear
10:19 PM SpeedEvil: no
10:19 PM codepython7771: SpeedEvil: http://vedder.se/2015/01/vesc-open-source-esc/
10:19 PM mrdata: codepython7771, it isnt about the gear but the chasis mount, i am told here
10:21 PM mrdata: a guy here is showing me a motor from a chrysler seat, that is geared to turn at around 33 rpm
10:21 PM mrdata: i'm thinking that's the speed you want for the garden robot
10:24 PM robotustra: codepython7771: it's for timing belts
10:24 PM robotustra: not break yet
10:25 PM robotustra: but it depends on what you need if cause
10:25 PM robotustra: my robot is slow - 1 m/s max speed
10:25 PM mrdata: thats not very slow
10:26 PM * mrdata imagines the thing swinging an axe
10:26 PM robotustra: https://www.youtube.com/watch?v=cTr5zi_TA94
10:28 PM mrdata: nice
10:28 PM robotustra: I don't like noise, but in general it works good
10:29 PM robotustra: may be I'll replace motors for silent ones
10:29 PM codepython7771: robotustra: I'm still fighting to control a hoverboard motor using a vesc motor controller
10:30 PM codepython7771: robotustra: tried that robot on a carpet ? :)
10:30 PM robotustra: you mean tank mode?
10:30 PM robotustra: I didn't because I don't have carpet
10:31 PM robotustra: have to make full robot skeleton and after that populate with muscles
10:31 PM codepython7771: robotustra: I've a similar design, but i drive the wheels directly with the motors, and those planetary gear motors are wearing out because of carpet
10:32 PM robotustra: this base will drive flat floor only
10:32 PM robotustra: that's why I did reduction
10:32 PM jandor_: guys, I scripted gazebo at last
10:32 PM robotustra: and it's not a planetary gearbox, it's simple gearbox
10:32 PM jandor_: hooray
10:33 PM robotustra: jandor_: what robot?
10:33 PM codepython7771: I could use some help in controlling the vesc with python - not sure where i can get that help though :)
10:33 PM jandor_: our robot, darwin-op like
10:33 PM robotustra: jandor_: video?
10:33 PM robotustra: have video?
10:34 PM mrdata: what would reduce the noise of that robot?
10:34 PM jandor_: no, why?
10:34 PM robotustra: jandor_: have a link for robot model?
10:34 PM jandor_: it's not opensource yet
10:34 PM jandor_: but it is much like darwin
10:34 PM robotustra: mrdata: silent gearbox
10:35 PM jandor_: I mean I did scripting around gazebo, so it can try out different robot settings automatically
10:35 PM robotustra: jandor_: why do you need to simulate it?
10:35 PM jandor_: with genetic algos or whatever
10:36 PM jandor_: because simulation might run a lot faster than real time
10:36 PM robotustra: jandor_: what is the final goal of simulation?
10:36 PM jandor_: and without me
10:36 PM jandor_: aha
10:36 PM jandor_: it is kind of student work
10:36 PM jandor_: but we're not students
10:37 PM jandor_: but still figuring out how to use all that stuff
10:37 PM robotustra: use for what?
10:37 PM jandor_: so the main goal of THIS simulation is to help us to learn the whole thing
10:37 PM jandor_: we're starting a robotech department at our uni
10:38 PM jandor_: so we have to know it all )
10:38 PM robotustra: india?
10:38 PM jandor_: no, why?
10:38 PM robotustra: what country then?
10:38 PM jandor_: guess )
10:39 PM jandor_: you can make an educated guess by my wrong english
10:39 PM robotustra: russia
10:39 PM robotustra: Kazan
10:39 PM jandor_: vi dont spik a lot of inglish hea
10:39 PM robotustra: в общем ясно
10:39 PM jandor_: :_ or you can do it with whois, right
10:40 PM jandor_: please, speak english here
10:40 PM jandor_: be polite )
10:40 PM jandor_: to others
10:40 PM robotustra: не боись, переведут гугл транслэйтом если что
10:40 PM jandor_: not with slang
10:41 PM robotustra: :)
10:41 PM jandor_: I just discovered this channel
10:41 PM jandor_: a week ago or so
10:42 PM jandor_: what about you?
10:42 PM rue_house: I'd ned more sentences to guess
10:42 PM robotustra: how long are you in irc?
10:42 PM jandor_: a week
10:42 PM jandor_: or two
10:42 PM robotustra: I'm in IRC since 2000
10:42 PM jandor_: you should remember when I came in
10:42 PM jandor_: I was there since 2000, though. a couple of times
10:43 PM robotustra: this channel - may be 3-4-5 years already, not often
10:43 PM jandor_: mostly on linux-related channels
10:43 PM jandor_: come on, I see you here all the time
10:43 PM jandor_: every day
10:43 PM jandor_: what you mean "not often"?
10:43 PM robotustra: I'm not talking too much in this channel
10:43 PM jandor_: where then?
10:44 PM robotustra: other channels
10:44 PM robotustra: belarus for instance
10:44 PM robotustra: every day
10:44 PM jandor_: How are you related to robotics, btw? A university job too? or a hobby? something else?
10:44 PM robotustra: hobby
10:45 PM robotustra: full time hobby
10:45 PM jandor_: something drone-related?
10:45 PM robotustra: no,
10:46 PM robotustra: http://robotustra.ca/
10:46 PM robotustra: http://robotustra.ca/my-robot
10:46 PM jandor_: yep
10:46 PM jandor_: I'm there
10:47 PM robotustra: this is kind of long term project
10:47 PM robotustra: doing slowly but surely
10:48 PM robotustra: have the base, have head and torso and now working on joing it together
10:48 PM robotustra: after will program it
10:50 PM robotustra: http://imgur.com/oiYsNgl
10:51 PM jandor_: I did a couple of wheeled robots a while ago
10:51 PM jandor_: used arduino too
10:51 PM robotustra: arduino is good for motor controllers
10:51 PM jandor_: back in 2009-2010 we made a litte car for a notebook
10:51 PM jandor_: you might remember eeepc
10:52 PM jandor_: so it was in a car, with arduino and camera mount
10:52 PM robotustra: don't remember
10:52 PM jandor_: controlled via VPN )
10:53 PM jandor_: ok
10:53 PM jandor_: I like what I see on your pictures
10:54 PM robotustra: good
10:55 PM robotustra: http://imgur.com/pph3NGx
10:58 PM robotustra: thinking how to make good stereo vision https://www.youtube.com/watch?v=om_hhY21Tbg