#robotics Logs
Mar 23 2017
#robotics Calendar
02:24 AM rue_bed: the cnc seems to have taken the new brushes ok
02:27 AM rue_bed: see in the morning
02:48 AM Jak_o_Shadows: Night rue
08:40 AM rue_bed: mmmm
03:22 PM iztech_ is now known as iztech
03:38 PM iztech_ is now known as iztech
09:59 PM anniepoo: We're setting up to cast aluminum
09:59 PM anniepoo: 8cD
10:02 PM zhanx: what is *cd
10:02 PM zhanx: 8cd
10:02 PM zhanx: anniepoo:
10:03 PM z64555: its a face
10:04 PM z64555: same as :D :-D :?D
10:05 PM zhanx: k
10:06 PM anniepoo: 8cD
10:06 PM anniepoo: it is indeed
10:06 PM anniepoo: and it's case sensitive
10:06 PM anniepoo: 8cD <-- annie's usual smiling face
10:07 PM anniepoo: 8cd <-- annie sticks her tongue out while soldering SMT ic
10:33 PM robotustra: :@)
10:33 PM robotustra: :@P
10:33 PM robotustra: :@b
10:34 PM anniepoo: >:o. >:o. >:o.
10:34 PM anniepoo: >:o. >:o.
10:34 PM anniepoo: bunnies
10:35 PM anniepoo: <~C|:^{[= the general
10:35 PM anniepoo: >(8c) Annie is ready for outer space
10:35 PM anniepoo: https://github.com/Anniepoo/prolog-examples/blob/master/emoticons.pl
10:36 PM anniepoo: parser and generator for annie compatible emoticons
10:51 PM robotustra: did u build fastboot?
10:52 PM anniepoo: fastboot?
10:52 PM robotustra: yep
10:52 PM robotustra: or how it's called?
10:54 PM robotustra: fast boot on RPi
10:54 PM anniepoo: I don't know what that is - something to speed up RPi boot time?
10:54 PM robotustra: may be it was not u
10:54 PM anniepoo: and do you mean 'did you develop' or 'did you build (ie run the makefile, etc)?
10:55 PM robotustra: it was kind of long sequence of action to build and install in on RPi
10:57 PM robotustra: the boot like this https://www.youtube.com/watch?v=4Fjfqz6FxC8
10:57 PM zhanx: fastboot was a team
10:57 PM robotustra: buildroot
10:58 PM robotustra: rpi-buildroot
10:58 PM robotustra: the link to github is in comments
10:58 PM zhanx: think my next robot is gonna use a beaglebone black
10:59 PM robotustra: may be better to take beaglebone blue?
10:59 PM robotustra: it already have plenty of stuff integrated for servos and DC motors
11:00 PM robotustra: https://www.seeedstudio.com/BeagleBone-Blue-p-2809.html?gclid=CJP7ke6Z7tICFQ0zaQodgYQLzQ
11:00 PM robotustra: it's adapted for robotics
11:00 PM zhanx: yes sorry wrong color
11:01 PM robotustra: https://beagleboard.org/blue
11:01 PM robotustra: I don't beleive in arms, I stick with intel Atom
11:01 PM robotustra: up-board is my choise
11:02 PM zhanx: i like having arms and hands
11:03 PM robotustra: I mean arm cpu
11:04 PM robotustra: I plan to have arms on my robot
11:04 PM zhanx: think i might have 4 on mine
11:04 PM robotustra: stuck a little bit with robot butt printing :)
11:05 PM robotustra: 4 hands?
11:05 PM robotustra: or 4 boards?
11:07 PM robotustra: my robot arm is still dwelling at the shelf
11:07 PM zhanx: 4 arms with hands
11:08 PM zhanx: still planning mine
11:08 PM robotustra: have a drawing?
11:11 PM ferdna: i have a HP jetdirect 500x can i connect this to my cnc machine? or will network transmission be too slow?
11:11 PM zhanx: robotustra: bad one if that counts
11:11 PM zhanx: ferdna: why would you?
11:12 PM ferdna: zhanx, because, i dont want the cnc in my room... i would like it in another room
11:12 PM robotustra: zhanx: you have to start from something
11:13 PM robotustra: pencil and paper, I always start from it
11:13 PM zhanx: ferdna: sorry thought that was a printer, you need to test it, prepare for it to crash
11:13 PM robotustra: ferdna: it's unclear what do you want to do
11:14 PM ferdna: i want to run my cnc(parallel port) from my network
11:14 PM zhanx: be better if you remoted the cnc from another computer and uploaded the data to it and let it run like that
11:14 PM anniepoo: I'm finding the python libs for the RPi3 are easy to use, and that gives me time to do things more on my own line of advance
11:14 PM ferdna: zhanx, lol... how dumb can i be...
11:14 PM ferdna: lol
11:14 PM ferdna: that will work
11:14 PM robotustra: ok, you want to send commands to CNC controller over wifi?
11:15 PM zhanx: real time commands over wifi, what could go wrong
11:15 PM ferdna: robotustra, no, i have a jetdirect 500x... which has parallel port interface... which connects to the network
11:15 PM ferdna: ethernet
11:15 PM ferdna: i thought i could use that
11:15 PM robotustra: ferdna: try it
11:15 PM robotustra: why not
11:16 PM robotustra: I don't have any RPi
11:16 PM robotustra: but I have BBBlack
11:16 PM anniepoo: yes, if remotely directly driving a CNC, consider safety
11:16 PM robotustra: which I don't know where to apply
11:16 PM zhanx: i got a BBBlack also as a arcade machine
11:17 PM robotustra: I put my cnc into the silencer box
11:17 PM robotustra: and it works in my room
11:17 PM robotustra: pretty silent
11:17 PM ferdna: silencer box?
11:17 PM ferdna: i have both rpi and bbb
11:18 PM zhanx: my rpi took the long walk of blue smoke awhile ago
11:18 PM robotustra: https://www.youtube.com/watch?v=BwhQ6ab06e0
11:20 PM ferdna: robotustra, super cool
11:20 PM ferdna: that is my next project!
11:21 PM ferdna: my pc doesnt have a parallel port either
11:21 PM robotustra: ferdna: I had built it on 2011
11:21 PM ferdna: hehehe
11:21 PM ferdna: really?
11:21 PM robotustra: yes
11:21 PM ferdna: can you show me pics
11:21 PM ferdna: ohhh that is you!
11:22 PM zhanx: nice cnc
11:22 PM robotustra: http://maholet.livejournal.com/20471.html
11:23 PM orlock: 5S Kaizen is complete
11:23 PM * ace4016 snickers
11:23 PM zhanx: robotustra: build photos do it justice
11:24 PM robotustra: zhanx: what do you mean?
11:24 PM ferdna: that is bad ass
11:25 PM ferdna: doesnt load properly... or maybe is incomplete: http://robotustra.ca/sound-box
11:25 PM zhanx: your build photos are nice
11:25 PM robotustra: http://maholet.livejournal.com/25443.html
11:25 PM orlock: yeah
11:25 PM orlock: thats impressive work
11:25 PM robotustra: slowly slowly
11:25 PM robotustra: I did all metal work for 4 month about
11:25 PM zhanx: see even time traveling orlock from the future likes it
11:26 PM robotustra: drilling filing, tapping. screwing
11:26 PM zhanx: good work
11:26 PM orlock: robotustra: and honestly, 4 months is no time at all for that
11:27 PM orlock: i've spend 4 years to get less done
11:27 PM robotustra: but in total I spent about a year
11:27 PM orlock: (though i had kids and bought a house as well)
11:27 PM robotustra: with the box and upgrades
11:27 PM zhanx: i spent 15 doing less
11:27 PM robotustra: http://maholet.livejournal.com/24976.html
11:27 PM zhanx: and then the army lost it in shipping
11:27 PM robotustra: http://ic.pics.livejournal.com/maholet/24765393/9009/9009_600.jpg
11:27 PM robotustra: kids in the box
11:28 PM orlock: haha thats a great shot of your kids
11:28 PM orlock: i hope they are your kids
11:28 PM orlock: otherwise it just went from amusing to scary
11:28 PM orlock: seeing as they ar eclimbing in a wooden box....
11:28 PM robotustra: life shows that they are mine
11:28 PM robotustra: didn't want to give me the house back
11:29 PM ferdna: lovely kids
11:29 PM orlock: hah hah hah :)
11:29 PM ferdna: lol
11:29 PM orlock: http://ic.pics.livejournal.com/maholet/24765393/26846/26846_900.png
11:29 PM orlock: That's a nice hand too!
11:30 PM orlock: IMG_6219
11:30 PM robotustra: more pics http://maholet.livejournal.com/30530.html
11:30 PM orlock: Whats the sensor for?
11:31 PM orlock: the camera
11:31 PM orlock: is that on some sort of gimbal mount?
11:31 PM orlock: or is it just adjustable
11:31 PM robotustra: orlock: what are you asking about?
11:32 PM orlock: http://ic.pics.livejournal.com/maholet/24765393/25392/25392_900.jpg
11:32 PM robotustra: it's an robot eye
11:32 PM orlock: robotustra: are you Todd?
11:32 PM robotustra: no, I'm not
11:33 PM orlock: robotustra: Whats the interface and sensor like?
11:33 PM robotustra: orlock: https://www.youtube.com/watch?v=om_hhY21Tbg
11:34 PM robotustra: it's arduino + A9800 optical sensor + 4 hall sensors
11:34 PM robotustra: I send commands via virtual usb
11:34 PM robotustra: uart
11:34 PM orlock: robotustra: Avago laser sensor?
11:35 PM robotustra: yes
11:35 PM robotustra: https://www.tindie.com/products/jkicklighter/adns-9800-laser-motion-sensor/?pt=full_prod_search
11:35 PM robotustra: this one
11:36 PM robotustra: but I think it's already the 3rd revision
11:36 PM robotustra: I have the purple one
11:36 PM orlock: ok
11:36 PM orlock: the sensors i'm after would be bigger physically
11:37 PM orlock: for astrophotography autoguiding - standard webcam sensors dont give you much space
11:37 PM robotustra: but cameras are getting smaller
11:38 PM orlock: robotustra: smaller doesnt mean better
11:38 PM robotustra: what are you doing for astrophotogaphy?
11:39 PM orlock: robotustra: for example - Canon's use what's called an APSC sensor, which is phsycially a bit smaller than the area the light from an old film camera would fall on
11:39 PM orlock: robotustra: so your image ends up appearing cropped or zoomed as the sensor is smaller than many camera lenses are designed for
11:39 PM zhanx: orlock does some nice photos of space thats for sure
11:40 PM orlock: zhanx: thanks! - i've started calibrating my new mount
11:40 PM orlock: http://somepicturesof.space/
11:40 PM zhanx: till my computer crash i was using that last one you sent me as a background
11:40 PM orlock: which means lots of long exposures and small tweaks
11:41 PM robotustra: I know one guy he does the same
11:41 PM orlock: robotustra: i use a Canon EOS40D as the main imager
11:41 PM robotustra: http://astro.ioda.by/en/gallery
11:41 PM orlock: robotustra: and a small telescope with a webcam (without lense) attached to the back
11:41 PM ferdna: JHONNY 5!!!
11:41 PM orlock: the webcam input is used to make small constant corrections to where the mount points
11:42 PM robotustra: do you track the night moving sky?
11:42 PM orlock: robotustra: yes, its a motorised equatorial
11:42 PM zhanx: no his stuff is in a pile (i saw your work shop pic orlock)
11:42 PM ferdna: http://ic.pics.livejournal.com/maholet/24765393/24340/24340_original.jpg
11:42 PM ferdna: funny
11:42 PM orlock: my previous mount had one stock motor and one i added on
11:43 PM orlock: the new mount is completely motorised, designed with it in mind, there's no manual control
11:43 PM zhanx: the one i had before was right before your daughter was born
11:43 PM zhanx: didn't see it there
11:44 PM robotustra: ferdna: I did this arm may be in 2006
11:44 PM ferdna: cool
11:44 PM robotustra: from the rests of the wood left from violinmaking
11:44 PM orlock: robotustra: autoguiding turned http://somepicturesof.space/10_Minute_Unguided.jpg into http://somepicturesof.space/10_Minute_Guided_First_Light.jpg
11:45 PM robotustra: orlock: good enough
11:45 PM ferdna: robotustra, is the silence box window special material?
11:45 PM orlock: robotustra: nah - the stars are not round, they are still lines if you zoom in
11:46 PM robotustra: ferdna: http://i.imgur.com/c201ilj.png
11:46 PM orlock: robotustra: but that's because my tracking rate was way way off
11:46 PM robotustra: now the arm looks like this
11:46 PM ferdna: wow
11:46 PM orlock: robotustra: unguided with the factory controller: http://somepicturesof.space/10_Minute_Unguided_Stock_motor.jpg
11:47 PM robotustra: orlock: so, what are you doing to improve?
11:47 PM orlock: robotustra: see how the lines in that picture are not straight? Thats noise in the gears
11:47 PM zhanx: orlock wants to make nasa look bad
11:47 PM orlock: robotustra: the autoguiding is to compensate for that mainly
11:47 PM robotustra: orlock: so just remove slacks
11:47 PM orlock: robotustra: noise, not slop
11:47 PM orlock: robotustra: periodic error
11:48 PM robotustra: from stepped motors?
11:48 PM orlock: not from the motors - from the gears
11:48 PM robotustra: hm
11:48 PM orlock: expensive commercial mounts can compensate a bit
11:48 PM robotustra: make very big reduction then
11:49 PM robotustra: or do a worm gearing
11:49 PM orlock: it already has a worm gear
11:49 PM orlock: thats the ause of most of the error
11:49 PM robotustra: I think that your mount is shaky
11:49 PM robotustra: do you have a picture?
11:49 PM orlock: that too a bit, that mount was a cheap one - no bearings
11:49 PM orlock: the new one has bearings
11:50 PM robotustra: ferdna: http://imgur.com/OGkRf2h
11:50 PM orlock: http://somepicturesof.space/20150607_220815.jpg - eq3, new mount is a HEQ5
11:50 PM ferdna: terminator h and
11:51 PM robotustra: orlock: it's not serious
11:51 PM robotustra: I think you have a solid posture
11:51 PM orlock: robotustra: i dug holes in the ground, filled withm with cement, pavers on top
11:51 PM robotustra: to make good pictures you need a concrete plate at least
11:51 PM robotustra: ok
11:51 PM orlock: drilled a hole in each to sit the ends of the tripod in
11:51 PM robotustra: and screw it
11:52 PM robotustra: tripod is shaky as for me
11:52 PM orlock: http://somepicturesof.space/20150328_163915.jpg
11:53 PM robotustra: as soon as I understand the problem - it comes from your stepped motors
11:53 PM orlock: robotustra: next step is to make a new electronics control board for the new mount, so it has a PC interface
11:53 PM orlock: robotustra: nope - problem with those pictures is all gear noise
11:53 PM robotustra: I woild bolted the tripod to the basework
11:54 PM orlock: robotustra: Not a possibility, if i was doing that i would just case a concrete pillar
11:54 PM robotustra: what drivers do you use?
11:54 PM orlock: Currently, just darlington arrays
11:54 PM orlock: but the new mount uses bipolar motors
11:55 PM orlock: so probably spare drivers from my printer
11:55 PM robotustra: is it stepper motors or not?
11:55 PM orlock: i also wish i had a camera lense that didnt suffer from chromatic abberation
11:55 PM orlock: the coloured fringing
11:55 PM orlock: Yes, stepper motors
11:55 PM robotustra: what number of steps?
11:55 PM robotustra: per revolution??
11:55 PM orlock: but the old ones are geared unipolar
11:56 PM orlock: new mount the motors are ungeared bipolar
11:56 PM orlock: Rotation of what? The mount, or the steppers output shaft?
11:56 PM robotustra: 200?
11:56 PM robotustra: I mean the number of steps per revolution of your stepper
11:56 PM orlock: The new one uses 1.8 - the old one, i'm unsure as they were geared, but probably 1.8 before that
11:57 PM orlock: but i don't care about steps per revolution
11:57 PM orlock: i care about the time between the steps to track the stars accuratly
11:58 PM * orlock still needs to find something to do with the 30 Nema 23's he found
11:58 PM orlock: robotustra: you might like the desk i managed to get from work
11:58 PM orlock: i think it's become one of my most prized possesions
11:58 PM orlock: http://en.crypt.net.au/ESDBench/IMG_1445.JPG.jpg