#robotics Logs

May 14 2019

01:09 AM katsumi: moin
01:14 AM katsumi: http://hasis.hopto.org/video/kuka_weizen.mp4
01:14 AM katsumi: may be next time tne robot will offer a tsing-tao beer
01:14 AM katsumi: hf
01:18 AM SleepyTurtle: katsumi: I can't seem to be able to load the video
01:20 AM katsumi: hmmm?
01:20 AM katsumi: what's the problem?
01:27 AM mrdata: worked for me
01:27 AM katsumi: access.log says it's working
01:29 AM katsumi: I#ve seen a lot of videos kuka bots offering weizen but this is the biggest
01:29 AM mrdata: yeah that thing is a monster
01:29 AM mrdata: talk about overkill for bartending
01:29 AM mrdata: sheesh
01:30 AM mrdata: it's funny tho
01:31 AM katsumi: do not scare the bartender
01:31 AM katsumi: ;)
01:33 AM katsumi: 2 kästen paletten programmierung
01:38 AM katsumi: I'm happy you like it
01:39 AM mrdata: yeah thats fun
01:40 AM katsumi: ABB copied this but i do not like 'em
01:41 AM mrdata: who?
01:45 AM katsumi: mom
01:45 AM katsumi: ...
01:45 AM katsumi: https://www.youtube.com/watch?v=TH_h87J8TZ8
01:49 AM katsumi: I'd done long time service for robots and FU freqency converters
01:49 AM katsumi: abb is a piece of shit
01:56 AM katsumi: really big mashines
01:58 AM katsumi: dc converters for big cold forging mashines
02:00 AM katsumi: 160 hubs the minute
02:01 AM katsumi: funny errors
02:01 AM katsumi: oh ..i'll reset this
02:02 AM katsumi: next day
02:02 AM katsumi: the same
02:03 AM katsumi: oh ..i'll reset this
02:04 AM katsumi: escalated this to abb
02:05 AM katsumi: dinky winky came out to do some tests
02:05 AM katsumi: oh ..i'll reset this
02:07 AM katsumi: in the end i found the problem in optoelectronic device what's connecting to the mashines system
02:07 AM katsumi: so what
02:09 AM rue_mohr: sorry, I'd chat but I'm falling asleep
02:09 AM katsumi: hmm
02:09 AM rue_mohr: ABB?
02:09 AM rue_mohr: heh
02:10 AM katsumi: do service hate em
02:12 AM rue_bed: its amazing how so many people cant diagnose things
02:12 AM katsumi: may be that's not the rite chat to cry about
02:12 AM rue_bed: so many doctors cant
02:13 AM katsumi: so but the ings did it bad in the first
02:16 AM rue_bed: so, PID
02:16 AM katsumi: the drive is a schleifringläufer
02:17 AM katsumi: dc
02:17 AM rue_bed: I realized that PID is like a cheap EQ
02:17 AM rue_bed: whcih triggered me to start building a filter profiler
02:18 AM rue_bed: I want to be able to run profiles down to like 1Hz for mechanical systems
02:18 AM rue_bed: and up to 30kHz-ish for audio stuff
02:18 AM rue_bed: http://ruemohr.org/%7Eircjunk/projects/filterprof/slide.htm
02:18 AM rue_bed: its being quite a project so far
02:19 AM katsumi: omg thats a resonator weapon
02:19 AM rue_bed: chewing away on it..
02:19 AM katsumi: doris day is dead
02:19 AM rue_bed: measuring freqs down to 1Hz is intersting
02:21 AM rue_bed: as filters turn up in everything, the results will be intersting
02:21 AM rue_bed: I want to see if I can make an FFT filter that just drops out channels
02:22 AM katsumi: hoi thats fun
02:22 AM rue_bed: but not by doing the fft and then the ifft
02:22 AM katsumi: mini labor
02:23 AM rue_bed: also want to see how math compares to real world results on analog filters
02:23 AM katsumi: yes
02:24 AM rue_bed: and it turns out most sine wave oscillators are horrid
02:24 AM katsumi: tnx for the link
02:25 AM katsumi: looks awesome
02:25 AM rue_bed: I didn't notice how wrong they were till I did the DAC one
02:26 AM katsumi: i'm a resonator fan club provider ;)
02:26 AM rue_bed: so I should be carefull with the low freq servos or I'll go insane?
02:26 AM katsumi: you insane
02:26 AM rue_bed: safe, GOOD!
02:27 AM katsumi: hrhrhr
02:30 AM katsumi: how big would the resonator be for a 2.73Hz wave
02:31 AM rue_bed: ? that stuff I did is all regular components, RC
02:31 AM katsumi: how big would the resonator be for a 2.73Hz wave
02:31 AM rue_bed: hmmm
02:31 AM katsumi: calculate it
02:31 AM rue_bed: depends which way the crystal was cut
02:31 AM katsumi: lambda half
02:32 AM katsumi: air
02:32 AM rue_bed: I wonder what kinda gain it would need
02:33 AM katsumi: calculate it
02:34 AM rue_bed: maybe later
02:34 AM katsumi: lol
02:39 AM rue_bed: its funny how many filters are in a filter profiler
02:40 AM katsumi: find a valley with min 5km place the device there provide it with electricity build the coils and turn off the world
02:40 AM katsumi: mathematics
02:40 AM katsumi: ;)
02:43 AM katsumi: place your antenna in the middle of the valley.. sent your wave
02:47 AM katsumi: we r tlking about terra watt so we need a atomic pile to do this
02:47 AM katsumi: failed
02:47 AM katsumi: Ö
02:52 AM katsumi: hrhrhr
02:55 AM mrdata: yes they can
02:55 AM katsumi: how?
02:56 AM mrdata: with large reflectors
02:57 AM katsumi: what dimensions you think are needed
02:58 AM katsumi: tne pinky and the brain
02:59 AM katsumi: we'll take over world domination
02:59 AM katsumi: hrhrhhr
03:01 AM katsumi: first caculate the lenghts of that 2.73 Hz
03:01 AM mrdata: dimensions of the reflector depend on tightness of the beam and the wave length
03:01 AM mrdata: 2.73 Hz for what medium though
03:01 AM katsumi: air
03:02 AM mrdata: sound? light?
03:02 AM katsumi: sound
03:02 AM mrdata: ok, velocity is about 330 m/s
03:02 AM katsumi: ^^
03:03 AM mrdata: so 2.73 Hz has wave length = v / f = 120.9 m
03:03 AM mrdata: so use rayleigh criterion
03:03 AM katsumi: hm
03:03 AM mrdata: omega = 1.22 lambda / reflector-dia
03:04 AM mrdata: where omega is the half power beam width
03:04 AM katsumi: mom
03:04 AM mrdata: in radians
03:05 AM katsumi: mom
03:05 AM mrdata: ?
03:05 AM mrdata: how tight is the beam
03:05 AM mrdata: for giggles lets say 10 degrees
03:05 AM katsumi: 120m
03:05 AM katsumi: hm
03:06 AM mrdata: which is 0.1745 radian
03:07 AM katsumi: you got me
03:07 AM katsumi: wait
03:07 AM mrdata: solving for reflector diameter then = 1.22 (120.9) / 0.1745 = 845 m
03:07 AM katsumi: in radius
03:07 AM katsumi: find a valley with min 5km place the device there provide it with electricity build the coils and turn off the world
03:08 AM katsumi: q.e.d.
03:08 AM katsumi: ;)
03:09 AM katsumi: how many reflectors well need?
03:09 AM katsumi: octagon?
03:09 AM mrdata: ?
03:10 AM katsumi: you have one reflector?
03:10 AM mrdata: yeah; one reflector giving you a focused beam 10 degrees wide
03:11 AM mrdata: where is the target
03:11 AM katsumi: parabolic octogonic
03:11 AM mrdata: how big is the target
03:11 AM katsumi: i have no target
03:12 AM mrdata: you could build a resonant cavity and put the target at an antinode
03:12 AM katsumi: ok just for fun bejing
03:13 AM mrdata: i think they have enough problems with smog and sand storms
03:13 AM katsumi: lets say i have found a place located in austria and want to switch off bejing
03:13 AM katsumi: yeeah
03:13 AM katsumi: another target
03:13 AM mrdata: i'm not really understanding this switch off business tho
03:14 AM mrdata: 2.73 Hz causes what
03:14 AM katsumi: no business
03:14 AM mrdata: is that the brown note?
03:14 AM katsumi: euler strikes back
03:14 AM katsumi: ;)
03:15 AM mrdata: https://en.wikipedia.org/wiki/Brown_note
03:15 AM katsumi: tnx
03:17 AM mrdata: i must sleep; nn
03:18 AM katsumi: i can endeneer that. need money. ;)
03:18 AM katsumi: gn8
03:19 AM katsumi: was a funny talk thiz monin
03:32 AM katsumi: we will reflect it on ionossphere
09:32 PM ronox: hey, assuming i could open the motor to gain access, can/should i put hall effect sensors in a brushless motor to make it sensored, for use as a servomotor?
09:34 PM orlock: there likely won't be any room
09:35 PM orlock: but it might work
09:35 PM ronox: what if there was?
09:35 PM ronox: :O
09:35 PM orlock: so
09:35 PM orlock: start sizing up sensors
09:35 PM ronox: also this would be a BLDC rc sort of motor, if that wasnt implied
09:35 PM orlock: and probing
09:35 PM Tom_L: orlock didn't you make a drive for a telescope once?
09:36 PM ronox: also, are ratiometric sensors used? or just the fixed on/off ones?
09:37 PM orlock: Tom_L: yeah, that was just a different implementation of the standard method to drive them
09:37 PM Tom_L: would that be similar to tracking a satelite?
09:37 PM orlock: just toggling coils via transistors, same as factory, i just added an arduino interface
09:38 PM orlock: yeah, both easier and mor difficult in some aspects
09:38 PM orlock: Tom_L; sorry, thought your request was related to ronox's query
09:38 PM Tom_L: guy in another channel is working on some satelite tracking thing
09:38 PM Tom_L: no
09:39 PM orlock: Tom_L: none of mine would go fast enough
09:39 PM orlock: and he may or may not want to deal with equatorial vs alt/az mounts
09:39 PM orlock: mine are massivly geared down
09:40 PM orlock: i guess it all depends on the payload
09:41 PM orlock: and acceptable resolution
09:41 PM Tom_L: he's doing alt/az i believe or at least that may be the goal
09:43 PM orlock: lots of people done it, if he's using steppers he can get a board to drive it for $15