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20-05-2009 #13
Option 3 for me no question.
Using option 1 or 2, if one motor stalls, the other may continue to drive and you couldl get a bit more than racking. Slaving axes or driving from the same driver won't stop this happening unless you are introducing some sort of closed loop monitoring. Can't beat doing your alignment in hardware IMO.
Single drive with belts or rack and pinion would be how I would do it or as John suggests, drive the gantry from the centre underneath the table.
Just my opinion of course
Regards, Jeff.Nothing is foolproof......to a sufficiently talented fool!
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