Re: [CAD_CAM_EDM_DRO] Hacking Optical Mice as position/distance encoders

Tim Goldstein wrote:

> If you open up standard a mouse you will find 2 low line count quadrature
> encoders. I just opened up a MS wheel mouse and it has 36 line encoder
> wheels. Resolution would be pretty rough. If you mounted them directly on
> the motor with a 2:1 belt drive and a 5 tpi screw you would get 1440 counts
> per inch in quadrature which works out to just under .0007" per count.
>

On the face of it that doesn't sound to bad for resolution but if you apply the standard rule that resolution needs to be 5X
better than the accuracy you want to achieve then it doesn't sound nearly as good.
Might do for wood work but metal tends to demand a bit more than that if things are to fit decently.

Dave.

ps. Still people out there are thinking and asking questions and that is at least half the battle.
"If you don't learn something every day then you must be trying not to".







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