Re: [CAD_CAM_EDM_DRO] move error in MACH3

chuck merja wrote:

> BTW - as I said I have some thoughts about how to accurately measure
> longer moves, but I'd love any suggestions...I have 6" dial calipers, 6"
> precision parallels, 123 blocks, a 3" vise, a laser "edge finder", real
> edge finder, a machinists precision square, and maybe a precision angle.
>
>

A stack of gage blocks set against a precision square that has been
aligned with the
axis and clamped is the best way. But, maybe you could do the same with
your
123 block. Mount the indicator to the head, and align the square to the
axis and
clamp gently. Now, you can zero the indicator against the square, and then
insert the 123 block in 3 different positions, to make measurements at
3 values. With two 123 blocks, you can get all the way up to 6".
Measure with the table moving toward and away from each reading, and
put it all in table form, and something useful ought to come from that.

I don't know Mach, but maybe you have a lot of backlash, but the person
who set up the backlash setting is covering that up with Mach so you
don't see it in MDI, but maybe backlash compensation is not activated
in jog moves.

Jon