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 backlash with usb motion card

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garage



Posts : 1
Join date : 2013-01-30

PostSubject: backlash with usb motion card   Wed Jan 30, 2013 1:00 pm

hi experts,

i get a usb motion card via ebay. all works well. in/outputs and motion are ok. but when i measure my axis, i 'found' a backlash.
for example:

Y-axis is 0.
move Y to 0.55 an measuring show 0.47
move Y back to 0.00 measuring show 0.00
move Y to 0.55 an measuring show 0.47
move Y back to 0.00 measuring show 0.00
and so on

after this, i changed back to parallel port and all is ok - no backlash on axis
now i changed to usb motion card again and use a different PC - the same issue.
any hints...?
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