Re: [CAD_CAM_EDM_DRO] PIC DRO

on 2000-04-04 16:56:02 UTC

Do you require a DRO or just a counter? If it is the latter then spending good money in doing the job for high accuracy is not the way to go. There are much cheaper ways to achieve what you require. If it is the former then a line has to be drawn because the PIC can only hold a limited amount of programming and it would make sense to me to go for the higest resolution that is practical using off the shelf parts that anyone can afford. I am not a programmer and this question should really be answered by the guy that is doing the thinking bits.

What I think should be avoided is trying to cater for every possiblilty and everyone loses interest with nothing being completed.

Regards,

Terry.

----- Original Message -----
From: Charles VanLeeuwen
To: CAD_CAM_EDM_DRO@egroups.com
Sent: Tuesday, April 04, 2000 8:32 PM
Subject: Re: [CAD_CAM_EDM_DRO] PIC DRO

I'd like to be able to use some of the 1000 line encoders I already have
that have cogged belt drives that I can run over an idler and get a reading
directly off the moving part, not the drive. I don't really need accuracy
to the last thou.

cvl

> It seems like the problem will be how to couple to everyone's shafts.
> What would you use for a shaft encoder that would be somewhat
> universal? There may be no way to fit full size machines as well as
> tabletop machines. Also, a shaft encoder cannot manage the backlash,
> so your resolution will be no better than the current lash in the
> lead screw, right?
>
>
> Bryan Mumford

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