Re: [CAD_CAM_EDM_DRO] Any simple way to map ballscrews?

vrsculptor wrote:

>Mach3 (and I'm pretty sure EMC) allows you to enter a leadscrew
>compensation table to correct for errors in the leadscrew pitch. Does
>anyone have any sugestions on how to measure the error other than
>using a dial indicator in the spindle, a block on the table and inch
>worming down the length of the table. I'm looking at using rolled
>ballscrews that can vary as much as .007 a foot.
>
>

Yes, you need a stack of gage blocks. You move one inch at a time, and
place
another block in the stack, and using a dial test indicator, you move a
little
bit until the dial reading is the same every time. The gage block sets
come with
a 1, 2 and 4" block, and maybe you get two 1" pieces. Beyond that, you
have to
make up a set of 4" blocks that match your 4" piece, or some other scheme to
get past the range of the set of blocks.

Jon