#robotics Logs

Apr 16 2017

12:42 AM jandor: hey
12:51 AM anniepoo: hi
12:51 AM anniepoo: jandor, you around?
12:52 AM anniepoo: I like MOSES and YARP
01:01 AM anniepoo: at least so far
01:09 AM jandor: yep
01:09 AM jandor: MOSES?
01:09 AM jandor: you mean MORSE?
01:31 AM jandor: afaik yarp is just ros with messages only
01:31 AM jandor: I mean it implements pub/sub only in a way of ROS
01:35 AM Anniepoo_: bi
01:36 AM Anniepoo_: true, but it doesn't require you bring the entire world in with you
01:37 AM Anniepoo_: and it looks like it has a nice collection of low latency, performance sensitive connection methods
01:44 AM jandor: yep
01:44 AM jandor: I don't know about standard messages though
01:44 AM jandor: has it any of them or not
01:44 AM jandor: ROS does
01:45 AM jandor: and morse kinda too
01:46 AM jandor: I'm reading Andrew's paper on task planning
01:49 AM jandor: and
01:49 AM jandor: and it's too academic on my mind
01:50 AM jandor: thanks god he isn't listening )
01:51 AM Anniepoo_: hi
01:52 AM Anniepoo_: good q about yarp
01:55 AM jandor: what is q?
01:55 AM Anniepoo_: question
01:56 AM jandor: ok )
01:57 AM Anniepoo_: yes, they support IDLs,
01:57 AM Anniepoo_: ROS message types, and the THRIFT set
01:58 AM Anniepoo_: but I'm used to prolog's way
01:58 AM Anniepoo_: hamd me something, I'll figure it out
02:11 AM Anniepoo_: ok, why this stuff is always a PITA
02:11 AM Anniepoo_: built in assumption- all low level device drivers must be written in C
02:12 AM Anniepoo_: I already have a complete set in python
02:30 AM jandor: I'm going for a walk
02:48 PM rue_house: did you ever come back?
03:01 PM jandor: what?
03:01 PM jandor: just now
03:01 PM rue_house: how far you go?
03:02 PM rue_house: 40km or so?
03:08 PM jandor: don't know
03:08 PM jandor: may be I did abou 10 at all
03:08 PM jandor: I was walking really slowly
03:08 PM jandor: and did a few stops
03:15 PM jandor: what about you?
03:45 PM rue_house: I still exist
03:45 PM rue_house: if you ever need to find a way to pick that up, I suggest being chased by a raptor
03:53 PM jandor: what is "pick that up" ?
03:55 PM SpeedEvil: 'walking really slowly'
04:00 PM Anniepoo_: @rue_shop3 did that bvh work for you?
04:01 PM rue_house: I downloaded it, but the bvh stuff isn't a current project, its in the queue
04:02 PM rue_house: :)
04:02 PM rue_house: it wasn't binary right?
04:05 PM rue_shop3: :P
04:10 PM rue_house: ... zaaAAAAAAAAK!
04:12 PM bayzbot: anyone have experience with the tutlebot? thoughts on the new turtlebot3 thats coming out?
04:34 PM Anniepoo_: hi
04:34 PM Anniepoo_: no
04:34 PM Anniepoo_: just wondered if I made the right thing
04:34 PM Anniepoo_: it's ascii
04:34 PM Anniepoo_: sorry bayz, no experience with it
04:50 PM Anniepoo_: upping my blender animation knowledge
06:58 PM chatter29: hey guys
06:58 PM chatter29: allah is doing
06:58 PM chatter29: sun is not doing allah is doing
06:58 PM chatter29: to accept Islam say that i bear witness that there is no deity worthy of worship except Allah and Muhammad peace be upon him is his slave and messenger
09:10 PM z64555: slave? wonder if thats a bad translation
09:10 PM z64555: either way, this isn't the chatroom for that sort of stuff
09:20 PM ace4016: it's a common chatbot on IRC that spouts that
09:38 PM rue_shop3: ok I put sopper shoes on the picknic table
09:50 PM rue_shop3: 45g @ 70mm
09:52 PM rue_shop3: match torque, 50g
09:53 PM rue_shop3: 63mm
10:57 PM Jak_o_Shadows: None of those are units of torque :P
10:57 PM Jak_o_Shadows: I installed taht new vice
10:57 PM Jak_o_Shadows: Not a great job, but meh, it's not a great bench.
10:57 PM Jak_o_Shadows: Haven't made the bench dogs or drilled holes in the bench yet
11:02 PM rue_shop3: ok
11:02 PM rue_shop3: all the mechanics of arm10 seem to be finished
11:02 PM * Tom_itx is still waiting for mech 1
11:02 PM rue_shop3: hmmm, can I use 3d printed parts on a mecha?
11:03 PM Tom_itx: will they hold up in the weather
11:03 PM rue_shop3: dunno
11:03 PM rue_shop3: nothing has come apart yet
11:03 PM Tom_itx: and higher stresses that the large mech will present
11:08 PM rue_shop3: cowling
11:10 PM Jak_o_Shadows: You use ABS yeah?
11:11 PM Jak_o_Shadows: I have some fence-caps that have been out in the weather for about a year and a half
11:11 PM Jak_o_Shadows: Holding up well
11:11 PM rue_shop3: nope, pla
11:12 PM Jak_o_Shadows: ah.
11:12 PM Jak_o_Shadows: Well, from the stress bit, PLA's meant to be brittler isn't it?
11:13 PM rue_shop3: its definitly harder
11:28 PM gottaname|wurk: 3d printed parts work fine
11:28 PM gottaname|wurk: they're quite tough
11:28 PM gottaname|wurk: PLA, not ABS though
11:29 PM Jak_o_Shadows: What do you think of PLA gottaname|wurk?
11:29 PM Jak_o_Shadows: ABS*
11:29 PM gottaname|wurk: Jak_o_Shadows, hard to work with
11:29 PM gottaname|wurk: unless you plan on printing figurines, then no
11:29 PM gottaname|wurk: PLA with 100% infill is ludicrously tough
11:29 PM Jak_o_Shadows: hard to work with in regards to warping?
11:30 PM gottaname|wurk: cold weather or hot weather?
11:30 PM gottaname|wurk: 3d printed parts are thermoplastics
11:30 PM Jak_o_Shadows: no, when 3d printing
11:30 PM gottaname|wurk: depends on how big the part is
11:30 PM Jak_o_Shadows: during the printing
11:30 PM Jak_o_Shadows: Cause it seems to carve, drill, etc fairly easily
11:30 PM gottaname|wurk: depends on the infill
11:31 PM gottaname|wurk: I plan to build a 1/10 scale tachikoma with 3d printed parts
11:32 PM * gottaname|wurk already does work with 1/16 tanks
11:32 PM gottaname|wurk: building a quadruped robot is no biggie.
11:32 PM Jak_o_Shadows: I generally go very infill light. I can't remember the last time I did above 12 percent
11:32 PM gottaname|wurk: that's the problem
11:33 PM gottaname|wurk: I do 100% infills for loading bearing parts
11:33 PM gottaname|wurk: 12% might be for covering or something
11:33 PM gottaname|wurk: a 100% infill cube 10 by 10 by 10cm
11:34 PM gottaname|wurk: I could put 100KG on it and it won't break
11:34 PM Jak_o_Shadows: I seriously reckon that you don't need 100% infill.
11:34 PM gottaname|wurk: people usually do 25% infill for decorative items
11:34 PM Jak_o_Shadows: People are crazy.
11:35 PM gottaname|wurk: Jak_o_Shadows, I can get reasonably good quality 1KG PLA for 5USD
11:35 PM gottaname|wurk: a pop
11:35 PM gottaname|wurk: I'm not really short on PLA here.
11:35 PM Jak_o_Shadows: But the print tiem...
11:35 PM gottaname|wurk: if it needs to be strong
11:35 PM gottaname|wurk: like I said, parts can do done with different infills
11:36 PM gottaname|wurk: load bearing skeleton? 100%
11:36 PM gottaname|wurk: cover or case? 25%
11:36 PM gottaname|wurk: or maybe only just print coverings and such in 3D
11:37 PM gottaname|wurk: and use metal for frame construction
11:37 PM gottaname|wurk: mecano is fine too
11:37 PM Jak_o_Shadows: absolutely bonkers.
11:38 PM gottaname|wurk: there's no real need to have an entire robot/vehicle made out of a single material
11:38 PM gottaname|wurk: composite construction best construction.
11:38 PM Jak_o_Shadows: yeah
11:39 PM gottaname|wurk: I'm printing because I don't intend for a robot to do actual work
11:39 PM gottaname|wurk: but more as a toy
11:39 PM gottaname|wurk: now if you want a robot to do work, then it has to be tough
11:40 PM gottaname|wurk: but then again, if its a work robot, you would have access to CNC mills and have an actual engineering degree.
11:43 PM rue_house: I should post updates to arm10
11:43 PM rue_house: Gottaname, seen my arm!?
11:43 PM rue_house: http://ruemohr.org/~ircjunk/robots/arm10/slide.htm
11:43 PM Jak_o_Shadows: I should take a photo of the shed
11:44 PM Jak_o_Shadows: Oh yeah, it's pretty obvious you use PLA. Clear/transparent/translucent PLA is pretty distinctive
11:45 PM rue_house: the translucent ones are much more brittle
11:46 PM gottaname|wurk: rue_house, ewwww micro servos
11:46 PM gottaname|wurk: :P
11:46 PM Jak_o_Shadows: You have those horrible screwdrivers too! http://ruemohr.org/~ircjunk/robots/arm10/p1080843.jpg
11:47 PM gottaname|wurk: the blue tower ones lol
11:47 PM gottaname|wurk: I'll bet you it can't handle weight
11:48 PM rue_house: those are std jewlers drivers
11:48 PM rue_house: it can move around some weight, its all counterbalanced
11:48 PM rue_house: I'll take a new pic, I just finished the balancing
11:48 PM Jak_o_Shadows: Yeah. Completely useless if you want to apply a decent amount of torque
11:48 PM Jak_o_Shadows: Probably decent for nicely threaded things though
11:49 PM gottaname|wurk: I need to order a fuckload of servos
11:49 PM gottaname|wurk: basically 12 for the legs, 3 servo per leg
11:50 PM gottaname|wurk: then steppers for each end, then the claws might need 3 each
11:50 PM gottaname|wurk: hey guys, you saw the 1/8 scale tachikoma japan is making?
11:50 PM gottaname|wurk: 1.7k usd per
11:50 PM gottaname|wurk: lol
11:51 PM gottaname|wurk: https://www.youtube.com/watch?v=Dwk0PqG0xg0
11:51 PM gottaname|wurk: 1.7k is overpriced, I could do something better and cheaper
11:53 PM rue_house: only the gripper has the micro servo
11:53 PM rue_house: rest are standard
11:55 PM rue_house: heh
11:55 PM gottaname|wurk: rue_house, gripper has the micro servo?
11:55 PM gottaname|wurk: ewwww
11:56 PM gottaname|wurk: standard throughout
11:56 PM gottaname|wurk: hell metal gear if you can
11:56 PM gottaname|wurk: I plan to use metal standards throughout, because I am insane
11:56 PM rue_house: hah
11:56 PM rue_house: I dont spend more than $40 on any project
11:56 PM rue_house: mostly, I dont spend more than $10
11:56 PM rue_house: I do a LOT of projects
11:56 PM gottaname|wurk: rue_house, nobody wants to see a half fucked bot
11:57 PM rue_house: so I learn a lot
11:57 PM gottaname|wurk: >:3
11:57 PM gottaname|wurk: rue_house, this robot would be cheaper than my 1/16 tanks
11:57 PM gottaname|wurk: 1 tank is liek 500 bux
11:57 PM gottaname|wurk: cost is relative.
11:58 PM gottaname|wurk: one of my design objectives is to have the tachikoma be able to pinch kids
11:58 PM gottaname|wurk: yesss