Alt-BEAM Archive

Message #10548



To: beam@sgiblab.sgi.com
From: "Mike Kulesza" mikekulesza@hotmail.com
Date: Mon, 21 Feb 2000 03:02:39 GMT
Subject: [alt-beam] walker - a bit better


Thanks for the help, especially Wilf.

So I removed the 7805, and put a 100 and .1 uF filter across power rails.
Also i put a .1 across each motor, and 1 for both h-bridges. Anyway, the bot
walks about a meter, before the LEDs start glowing less bright, and the
motors also slow down. Eventually the LEDs start flickering and go out
altogether. The motors also stop. If I power off, and then on again, the bot
takes a step and dies. But after about a 10 minute wait, its fine, but dies
again after about a metre. Im suspecting battery trouble. They're 2 no name
generic lithium batteries, each 3V, put in parallel for 6V total. What do
you think?
______________________________________________________



10549 Sat, 19 Feb 2000 22:00:37 -0800 [alt-beam] Re: MPJA geared motors "Dennison Bertram" These are actually very poor motors to use on a walker. The reason why that
gearbox looks so funky is because it uses a worm gear. This is VERY
innefecient and is just ingeneral difficult to use in walkers. Sorry. You
can still try though.

dennison


> I bought a couple of these motors from MPJA.
> >http://www.mpja.com/product.asp?product=7280+MD
> they run fairly well under the 6 VDC. the question is how do i mount them?
> the gearbox is kinda ackward and i'm not too sure how i could mout these
> puppies. these will be used on my first walker so i'm a little green in
this
> particular area of BEAM, how do you guys mount 'em? thx
>
> -Spencer
>

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