[19:49:21] <joshua_> hmmm
[19:49:27] <joshua_> so, I'm building a balancing bot
[19:49:35] <joshua_> (i.e., yet another DIY segway)
[19:49:44] <joshua_> my goal in this case, though, is to keep costs way down.
[19:49:51] <joshua_> I'm sampling as much as IC an and building as much as I can.
[19:50:23] <joshua_> thus far, I'v ebuilt an H-Bridge using some nicely sizeable FETs, intended to drive a fisher-price motor.
[19:50:46] <katsmeow> fisher-price is fast and powerful enough?
[19:51:04] <joshua_> plenty of torque at stall before it explodes, I've heard
[19:51:24] <katsmeow> i mean fast at speed, for balance recovery
[19:51:24] <joshua_> no load, they theoretically do 19krpm
[19:51:34] <katsmeow> err, powerful at speed
[19:51:36] <katsmeow> i are pooped
[19:52:00] <joshua_> yeah, I'm a little curious about that. I assume I want to run it at substantially less than max speed so that I can still extract torque if I
need to
[19:52:26] * katsmeow nods
[19:52:47] <joshua_> I'm pretty sure I want to gear this down 50:1 or so
[19:53:02] * katsmeow nods some more
[19:53:06] <katsmeow> i am exhausted
[19:53:10] <joshua_> heh
[19:53:32] <katsmeow> i think i'll nuke a small pizza and prop my paws up for a while
[19:53:35] <joshua_> heh
[19:53:50] <joshua_> any thoughts as to where I'd get such a gear, and how I'd get it to mate with a bicycle tire?
[19:55:12] <katsmeow> http://rifraf.rememberit.com.au
[19:55:42] <katsmeow> i am bilding with 12inch bike tires atm
[19:55:59] <katsmeow> picked up more parts today, for the lathe crosslide too
[19:56:01] <katsmeow> but bbl
[19:56:05] <joshua_> hmmm
[19:57:59] <joshua_> any specs about the F-P motor? google hasn't shown much other than the 19krpm no load and 160A stall
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[20:19:23] <wildmage|lab> joshua_, stay on a while, there's some people have more experience with this
[20:24:20] <joshua_> OK
[20:27:01] <wildmage|lab> joshua_, like rue_mohr, rifraf, and theBear
[20:27:26] <joshua_> OK
[20:27:38] <joshua_> I found http://www.usfirst.org/robotics/2006/Workshops/Getting_Most_From_Motors_2006.ppt -- I remember a bit of that from last time I did this
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[20:42:51] <joshua_> for those of you powerpointless, by the way, I screenshotted it all out and stuffed it at http://joshuawise.com/motors/view.php