#robotics Logs

Apr 26 2015

01:28 Jak_o_Shadows apparently, I am the help with ik (within the top 20 results)
01:29 Jak_o_Shadows http://jak-o-shadows.users.sourceforge.net/python/robot/armik.html I wrote this, and it shows up fairly high on google search. I am amazed
04:40 veverak nah
04:40 veverak why when I bought flower I only resisted 5 minutes to the notion of "robotizing the flowering"
04:41 botnut lol
04:41 botnut my ultimate goal would be to just have a bot that cleans the house, does the laundry, irons and throws out the trash
04:41 botnut you do that - id be VERYhappy
04:42 botnut walking my dog and washing the car would be great too
04:43 Jak_o_Shadows I'd settle for a robot vacuum cleaner that is better than a roomba
04:45 botnut ahaahahha
04:45 botnut my roomba has been modded
04:46 Jak_o_Shadows how so?
04:46 botnut well
04:46 botnut after having it for so long and it sucking ass
04:46 botnut I decided to mod it
04:46 botnut replaced sensors and put a new algorithm in for slamming and well it works better
04:46 botnut but the vacuum sucks
04:47 botnut would have been better off modding a dyson
04:47 Jak_o_Shadows I was under the impression that the stock roomba doesn't really do SLAM
04:47 botnut don't know
04:47 botnut but whatever it does - it annoys me
04:47 botnut I just ripped it out and put in an arduino
04:47 Jak_o_Shadows Good move.
04:48 botnut 100 lines of code and some soldering
04:48 botnut and now it at least does a consistent even sweep of the floor
04:49 Jak_o_Shadows indeed.
05:38 SpeedEvil It's annoying indoor 'GPS' is not trivial
05:58 veverak yeah
05:59 Jak_o_Shadows I wish there was a nice way of 1-2cm locating of many objects, even if there has to be a mat under them all
05:59 Jak_o_Shadows that isn't computer vision
06:47 SpeedEvil Is there a better source of very cheap gears rather than searching ebay for 'gear' and hoping, or ordering a ton from china?
06:47 SpeedEvil REasonably high powered ones.
06:47 SpeedEvil Jak_o_Shadows: nails.
06:48 Jak_o_Shadows Nails. Nails on the bottom of them into a grid?
06:48 SpeedEvil No, just nail stuff down and note the position.
06:49 Jak_o_Shadows haha, nah, i'm more talking about locating, say, warhammer/tabletop figures
06:49 SpeedEvil yeah
06:49 SpeedEvil It all comes down to budget.
06:49 SpeedEvil For example - if you have a micro and a coil inside each fig - things get rather easier
06:50 SpeedEvil As you could have a grid of x and y coils, and then determine which ones are in which.
06:50 Jak_o_Shadows Whilst that'd probably be fine, I don't have anywhere near the experience to go for that.
06:50 SpeedEvil Transparent tabletop and qrcodes or similar on the bottom
06:51 Jak_o_Shadows I thought of that, but a big transparent table is expensive, and that rules out different height, and multi-story buildings
06:56 veverak Jak_o_Shadows: doesn't have to happen
06:57 veverak plegixlas should be nice
06:57 veverak it's quite nice to work with and with reasonable thickness even not so expesnive
06:59 Jak_o_Shadows Still, it's not really applicable to other people. You're locked into a 8 ft plexiglass table.
07:00 veverak coils then :)
07:02 deshipu rfid instead of qr codes?
07:03 deshipu rfid stickers are quite cheap
07:04 Jak_o_Shadows then a great big mat?
07:04 deshipu a table with several rfid readers
07:04 deshipu 3, I think
07:04 deshipu and triangulate
07:05 deshipu by the signal strength
07:06 Jak_o_Shadows I remember seeing somethign that did it
07:06 deshipu another approach: put an attiny with an ir led blinking in a different pattern on each one, use two webcams to locate the leds
07:14 Jak_o_Shadows nope, can't find it.
07:14 Jak_o_Shadows There was a product that did it
09:09 deshipu https://www.youtube.com/watch?v=4pokbETJZ-A
09:09 deshipu vodka wagon
09:18 deshipu veverak: http://www.sage.unsw.edu.au/wang/jgps/v3n12/v3n12p05.pdf
14:11 rue_house mmhm
20:07 jadew hey, what's that wheels assembly that reduces the speed and increases the torque of a motor called?
20:07 jadew in my language is called a reductor, but that doesn't seem to be the case in english
20:10 Tom_itx gear reduction
20:10 jadew thanks