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[DPRG] Tamiya Twin-Motor Gearbox Encoder
Subject: [DPRG] Tamiya Twin-Motor Gearbox Encoder
From: djnz at comcast.net
djnz at comcast.net
Date: Tue Apr 24 23:27:01 CDT 2007
Rick,
Funny you should mention the magnet solution. My first attempt at
closing the control loop was with magnets. I glued magnets to the
back side of the crown gears and positioned hall effect sensors
between the crown and spur gear. Everything was going great until I
assembled both halves of the gearbox. The interaction of the magnets
either slammed the gears away from each other or toward each other,
depending on how I mounted them. That was one loud Tamiya gearbox.
The magnets I used were axially magnetized neodymium discs, 1/16" dia
x 1/32" thick.
Using weaker magnets or maybe more physical separation by using other
gears may yield better results.
Jesse
On Apr 24, 2007, at 9:33 AM, Rick Bickle wrote:
> Nice Job!
>
> I used this motor assembly in my sumo robot "robodozer" and though
> about
> doing something very similar, although I never did it. I also
> considered
> gluing a small magnet to one of the higher speed gears and using a
> hall
> effect sensor as an encoder. No circuit board required.
>
>
> Rick
>
> -----Original Message-----
> From: dprglist-bounces at dprg.org [mailto:dprglist-bounces at dprg.org] On
> Behalf Of djnz at comcast.net
> Sent: Saturday, April 21, 2007 11:53 PM
> To: dprglist at dprg.org
> Subject: [DPRG] Tamiya Twin-Motor Gearbox Encoder
>
> Hello All,
>
> After several inquires I have put together a web page to share my
> encoder solution for the Tamiya Twin-Motor Gearbox. The sensor
> implementation came together after reading David Anderson's "Home-
> Brew
> Shaft Encoders..." article in the the SRS Encoder Newsletter.
>
> The web page can be found at http://www.noplabs.com/twinmotor/
> twinmotor.html
>
> It's a new page, just put it together today, so let me know if you
> have
> questions or comments.
>
> Thanks,
> Jesse
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