#robotics | Logs for 2017-01-17

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[00:30:26] <Anniepoo_> how can I make a principled decision about what degrees of freedom to include in the snail's head?
[00:33:25] <AlienCat> I always wanted a robotic snail
[00:33:47] <Anniepoo_> >8@_
[00:33:52] <Anniepoo_> I'm making a robotic snail
[00:34:17] <AlienCat> B)
[01:04:21] <rue_house> so velocity wont be an issue
[01:04:51] <z64555> speed won't be an issue, velocity still is :P
[01:33:25] <rue_house> THE OTHER way of doing the lead screw drives would be to turn them so I could mount them between centers
[01:33:44] <rue_house> }/////////[=]/////////{
[01:33:54] <rue_house> makes it a bit more of a challange to drive them
[01:33:55] <Anniepoo__> sorry, got distracted
[01:34:05] <rue_house> naturally takes away from play problems
[01:34:32] <Anniepoo__> I'm not concerned about the drive - i'm using the OSEPP treads for that
[01:34:41] <Anniepoo__> I'm thinking about how the neck and head move
[01:34:46] <rue_house> anniepoo, use a pneumatic bladder actuator like that one on hackaday
[01:34:58] <rue_house> technically 3 axis, but lots and lots of movement
[01:35:14] <rue_house> gngiht
[01:35:19] <Anniepoo__> where do I get air?
[01:35:28] <rue_house> I'm gonna go dream about MY ALLIEXPRESS PACKAGES ARRIVING
[01:35:36] <rue_house> anniepoo, its all around you!
[01:35:57] <rue_house> ultrasonic compressor
[01:36:18] <Anniepoo__> ??
[01:36:34] <rue_house> https://www.aliexpress.com/item/12PCS-15mm-Piezo-Elements-Sounder-Sensor-Trigger-Drum-Disc/32763668914.html
[01:36:45] <rue_house> when you work it out, tell me how!
[01:37:08] <Anniepoo__> won't that buzz?
[01:37:14] * SpeedEvil wonders how many things he has in flight from aliexpress
[01:37:21] <rue_house> ultra
[01:37:40] <rue_house> not a sonic screwdriver, an ULTRAsonic screwdriver
[01:37:43] <rue_house> er, compressor
[01:37:55] <rue_house> I meant compressor
[01:38:26] <SpeedEvil> hmm - I thin just 3
[01:38:26] <Anniepoo__> hmm... wonder if I can get enough air volumen
[01:38:54] <Anniepoo__> I thought about using a speaker -there's a bunch of places the robot could use pneumatics
[01:39:10] <Anniepoo__> but I was afraid of noise and air supply issues
[01:41:08] <Anniepoo__> how about a speaker and stay below 10 Htz
[01:43:42] <Anniepoo__> or drive syringes with servo
[01:44:06] <Anniepoo__> but really, the mechanism's not the issue
[01:44:15] <Anniepoo__> the issue's where the joints should be
[01:44:29] <Anniepoo__> I started listing every place I'd like to have a joint, a
[01:44:47] <Anniepoo__> and at 12 servos and counting thought -- wait a minit here
[01:46:14] <Anniepoo__> portable nebulizers for aerosol drug delivery
[01:48:21] <rue_house> tell me how you solve the valve problem
[01:48:44] <rue_house> tho, I bet an ultrasonic flapping valve could work
[03:13:41] <Jak_o_Shadows1> rue, pleasant dreams
[09:11:17] <rue_house> if the twist were derviced in new times, it have been done by a sock company to increase sales
[09:11:24] <rue_house> derived
[09:40:41] <rue_house> @!#$%^ since when did an unsigned int go to 32 bits in gcc?
[09:42:24] <SpeedEvil> err - what?
[09:42:27] <SpeedEvil> forever?
[09:42:41] <rue_house> WHAAAT!@#$, no its been 16 for a long time
[09:42:50] <rue_house> long was 32
[09:42:51] <SpeedEvil> on what platform
[09:42:56] <rue_house> x86
[09:43:09] <SpeedEvil> unsigned int has generally been 32 bits since the 386
[09:43:48] <rue_house> wtf
[09:44:04] <rue_house> whats a long, 64?
[09:44:06] <SpeedEvil> (and indeed signed int)
[09:44:07] <SpeedEvil> yes
[09:44:57] <rue_house> so long long should be 128
[09:45:06] <rue_house> and I know long long long is tooo long for gcc
[09:45:57] * rue_house wonders how much of his code thats messed up in the past so far
[09:46:34] <rue_house> its cold out there, I dont want to go to work