Re: [CAD_CAM_EDM_DRO] CNC Precision on a Sherline

Hi, i think its a bunch of error adding up, some softwear, some step and
some the screw. My "Z" axis should be 3200 pulse to the inch but to get that
on a dial indicator i had to set 3275, and my x,y axis should be 800 and
have set 805 to measure right on. I will see if my second computer is the
same as the first with the same machine..cul brian f.

----- Original Message -----
From: "mszollar" <kenargo@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, September 02, 2002 11:29 PM
Subject: [CAD_CAM_EDM_DRO] CNC Precision on a Sherline


> Question; I was calibrating my Sherline mill motor travel/backlash,
> etc for my CNC machine. When I was through I noticed that I needed
> 8080 steps per inch (x and y) and 7950 SPI for Z. Is the axis screw
> that inaccurate?
>
> I measured with a micrometer and a dial indicator; both show the
> same results.
>
> Thanks,
> Ken
>
>
>
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