richard harris wrote:
> Update:
> So the usdigital differential receivers arrived yesterday spent the day 
> installing on all three axis.  I also trimmed all the encoder and power wires 
> as short as i dared.  I then decided to test my handy work and make sure i 
> didn't cross any wires.  Machine jogged in all three axis and all seemed 
> good. I set a dial indicator up and i commanded the x-axis to jog .1" and got 
> .099", i must have jogged the axis fifty times one inch one way then an inch 
> the opposite and every .1" motion it now comes up .001" short.
>   
So, on every reversal, you get a shift of .001"?  How about leaving it 
in E-stop and moving
the machine back and forth manually.  Does it still get a position shift 
after moving
and then moving back?

Or, is this just mechanical backlash?  Are you saying the position 
shifts by ANOTHER .001"
every time out and back, or just that one inch commanded moves are only 
.999" ?

Jon

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