#robotics Logs

Sep 12 2018

12:00 AM _unreal_: night
07:05 AM Guest85882 is now known as tsglove
08:53 AM babaum: Hello, I am studying Decentralized control. I have a problem in velocity and position feedback control: my book says that if I make an imperfect deletion of a zero (using a pole) into the root locus it could be a problem. Can anyone tell me why?
08:57 AM rue_mohr: ok
08:58 AM rue_mohr: babaum, if you create a pole, the system is gonna freak out
08:58 AM rue_mohr: that is, if its not canceled out
09:00 AM rue_mohr: http://ruemohr.org/~ircjunk/projects/servo/p1100692.jpg <-- force feedback, YEEAAAAA!
09:01 AM rue_mohr: totally bi-directional servo
09:02 AM rue_mohr: I should smear filler over my crusty peices of plywood before I use them for a project
09:13 AM rue_mohr: I think I'v figured out how to split it onto two controllers and maintain the no-master-no-slave design
11:09 AM weyland|yutani: rue_mohr, what happened to your gardening tool?
02:26 PM rue: wtf, is dk down?
02:27 PM rue: hello
02:27 PM rue: Tom_L, ?
02:31 PM rue: huh its back
03:09 PM Tom_L: rue, ?
03:10 PM rue: digikey was down, itsback up now
03:10 PM rue: TRYING TO BUY SOMETHING AT WORK!?!?!
03:10 PM Tom_L: that's a reason to panic
03:10 PM Tom_L: if DK goes
03:11 PM Tom_L: i was on a job today talking to an engineer that has a prusa
03:12 PM Tom_L: he printed a complete GE jet engine they use at his job
03:12 PM Tom_L: scaled of course
03:12 PM Tom_L: but he'd added bearings etc and a cut away to show the impellers
03:15 PM Tom_L: pretty cool actually
03:22 PM rue: hah, the advantage of having hte real models
03:24 PM Tom_L: probably talked longer than i worked
03:40 PM rue: so now your the only one in the world without a 3d printer? :)
03:40 PM rue: zhanx, technically has one, its just it smokes a lot
03:41 PM Tom_L: plenty to borrow then
05:58 PM * rue explods
06:49 PM rue_mohr: weyland|yutani, gardening tool?
08:58 PM rue_mohr: ok, I think I'm awake
08:58 PM rue_mohr: whats left of the day
08:58 PM rue_mohr: lost 2 hours, ok
08:59 PM _unreal_: hum
08:59 PM _unreal_: Got a few more parts in the mail
08:59 PM rue_mohr: that always nice
09:02 PM _unreal_: ordered :) phone jacks
09:03 PM _unreal_: little female recivers that go to male jacks.
09:03 PM _unreal_: I'm going to use them for the opto limit switches I'm going to use
09:03 PM _unreal_: That way I can run phone cable
09:03 PM _unreal_: phone cable take can a lot of motion
09:04 PM rue_mohr: yup
09:19 PM Tom_L: ever try one of those magnetic charge cords for phones?
09:23 PM rue_mohr: no
09:24 PM Tom_L: https://www.ebay.com/itm/USB-C-Fast-Charging-Cable-Type-C-Rope-Cord-3FT-Magnetic-Charging-For-Phones/362366747849?hash=item545ebdc4c9%3Am%3AmQcGZQeWa5-sFdImcz3Gzsw&var=631559302616
09:25 PM rue_mohr: hah funny
09:26 PM rue_mohr: their nice on apple phones, you cant accidently tear them out
09:29 PM rue_mohr: clog