#robotics Logs

Mar 12 2017

12:53 AM Snert: maybe that was just a "try it and see" and they now know that dogs and horses have it better their way.
12:56 AM Snert: or an adaptation for a special purpose like flat surfaces where the other way is better for general climbing.
01:00 AM Jak_o_Shadows: Maybe it lets you be taller without having a longer body
01:12 AM Snert: I would think it's more surface related. Or maybe better for a particular gait.
01:13 AM Snert: or just pure research.
01:14 AM Snert: don't we wish we had access to their methods and tooling.
01:14 AM Jak_o_Shadows: Or at least their work
01:15 AM Snert: oh yea. To just be able to look at things really up close and see what kind of connectors. Or see if they use flexible noodle wire on all moving joints and such.
01:21 AM Snert: I suppose Boston Robotics hosts a geekday when you can get up close and personal but I'll never be able to do that even if they do.
01:22 AM Jak_o_Shadows: Yeah. and you don't really want a day, you want a week
01:22 AM Snert: amen. And I wanna see the nuclear power plany, not the mess galley.
01:23 AM Snert: like they do when the navy has public day.
01:25 AM Jak_o_Shadows: Hmm. What ID are these bearings.
01:27 AM Jak_o_Shadows: about 3mm
01:28 AM Jak_o_Shadows: OD is 8
01:28 AM Jak_o_Shadows: 10
01:38 AM anniepoo_: I've been fortunate to be a sort of Forrest Gump - I always seemed to be standing there when the cool stuff happened. And let me tell you, Boston Dynamics has no magic sauce. They figure it all out one screw at a time
01:39 AM Jak_o_Shadows: Oh yeah, absolutely.
01:39 AM Jak_o_Shadows: But they have a team of people doing that. Which isn't shared with us ::(
01:39 AM anniepoo_: and as long as you're asking why the knee's in front or in back, you're on their tail
01:39 AM anniepoo_: yup
01:54 AM Jak_o_Shadows: Will have a video up in a minute
03:02 AM Jak_o_Shadows: https://www.youtube.com/watch?v=4TMOZVoygkw&feature=youtu.be
03:02 AM Jak_o_Shadows: Note that the lower leg there is just moving for some reason.
03:04 AM Jak_o_Shadows: The linkages there are PRETTY CLOSE to what I'm analytically using.
03:04 AM Jak_o_Shadows: Note that it looks like I'm going to have to make something wider, to deal with the stewart platform legs in the middle
03:16 AM SpeedEvil: http://i.imgur.com/OnJHfqL.jpg
03:16 AM SpeedEvil: anniepoo_: - reminded me
03:31 AM anniepoo_: anniepoo :- reminded_me. ?? I've converted you to Prolog?
04:23 AM Jak_o_Shadows: Hmm. Looking at the lengths of my legs, I think I'll just print them.
04:51 AM pokmoo is now known as pokmo
05:07 AM Jak_o_Shadows: Hmm. It'd be nice if it were supported on both sides
05:08 AM Jak_o_Shadows: Hmm. Not for the shoulder.
05:08 AM Jak_o_Shadows: But the knee...
05:49 AM veverak: 80 bytes for graph node, 24 bytes for edge
05:50 AM veverak: good for start
05:50 AM Jak_o_Shadows: Well, that piece is designed.
05:51 AM Jak_o_Shadows: 173x63mm bounding box
05:51 AM Jak_o_Shadows: I can live with that, it's printable
05:53 AM Jak_o_Shadows: Where the second servo attaches may be a tad weak, but it SHOULD be fine, consdiering there isn't going to be any twisting loads on that
05:54 AM Jak_o_Shadows: You know what, i'ts too nice a part to not show off
06:02 AM Jak_o_Shadows: http://pasteall.org/pic/show.php?id=113480 The upper leg. Left hand side is teh shoulder, right hand side is the knee.
06:02 AM Jak_o_Shadows: The square cut-out in the upper right is for the linkage for the lower leg
06:02 AM Jak_o_Shadows: Which I'm about to start cadding
07:26 AM Jak_o_Shadows: Done the lower leg, and the foot: http://pasteall.org/pic/show.php?id=113482
07:31 AM Jak_o_Shadows: The foot will be easy enough to print
07:32 AM Jak_o_Shadows: Haven't put bearings in it just yet, I don't have enough, and can always reprint if it's an issue.
07:32 AM Jak_o_Shadows: The knee might be a little hard to print. I potentially should add some material, and just print it rotated around 90
07:32 AM Jak_o_Shadows: Also, somewhere the cat feet turned into duck feet
07:44 AM AlienCat: you make an robotic cat?
07:44 AM Jak_o_Shadows: More or less
07:44 AM AlienCat: :3 I want one
07:46 AM Jak_o_Shadows: ahah. Not finished. Very much still in design stage
08:27 AM AlienCat: aw
04:52 PM rue_house: I want see a pic of a droid on a computer clicking "I'm not a robot", doing the captcha
05:02 PM veverak: there was
05:02 PM veverak: somewhere
05:03 PM deshipu: that was an arm
05:03 PM deshipu: one of those yellow toy arms
05:24 PM justanotheruser: Is there something like an "industrial rubber band"? One which is designed to be stretched and unstretched many times without change in its spring constant
05:27 PM Snert: sounds like what bungee jumpers would use
05:31 PM justanotheruser: yeah, small bungee cable might be it, that is if I could find one that gave the spring constant on mcmaster
05:36 PM justanotheruser: I think I'll go with an alternative design using a torsion spring
06:32 PM z64556 is now known as z64555
08:37 PM rue_house: damnit, cant play the course on firefox, and due to a developer spatt, chromium cant play mpeg sound
08:37 PM rue_house: so I cannot do this online course on my machines at home
08:38 PM Jak_o_Shadows: Opera? If you don't mind the Chinese watching?
08:38 PM rue_house: opera cant do anything
08:39 PM rue_house: might as well just try to use lynx
08:39 PM Jak_o_Shadows: It's because the online course has some stupid bloody web video player
08:39 PM Jak_o_Shadows: Instead of just letting you download the files
08:39 PM rue_house: yup
08:40 PM Jak_o_Shadows: Nevermind that you might want to watch them a bit faster, or slower, or on the train, etc
09:14 PM Jak_o_Shadows: femur printed!
09:26 PM Jak_o_Shadows: It may be a bit weak in bending
09:27 PM malcom2073: femurs often are
09:27 PM Jak_o_Shadows: erm, the off-axis one. The thing axis
09:50 PM Jak_o_Shadows: http://pasteall.org/pic/show.php?id=113499
09:50 PM Jak_o_Shadows: Still
09:50 PM Jak_o_Shadows: considering it's only 3.5mm thick
09:50 PM Jak_o_Shadows: not too bad
10:27 PM rue_shop3: I NEED to eliminate being tired for 18 hours in a row
10:29 PM zhanx: think there are drugs for that
10:33 PM justan0theruser: hmm
10:33 PM justan0theruser: I need a self opening hinge
10:38 PM xuul: why is ##electronics basically disabled
10:38 PM xuul: +m and no one has voice
10:39 PM xuul: oh maybe i need to register n/m
10:39 PM justan0theruser: looks fine to me
11:40 PM rue_house: hmm I guess another advantage to turning myself into a robot is that I can chuck all the clothes not havig to do laundry would be nice
11:58 PM Jak_o_Shadows: tibia done
11:58 PM Jak_o_Shadows: well, printed
11:58 PM Jak_o_Shadows: next time I should print it in two parts
11:58 PM Jak_o_Shadows: stuff the support material