Thread: Driving floating end (ballscrew)
ok iv just run some tests on the coupler... with 10N it compresses by .43mm im assuming simmilar under tension
the full travel of the coupler is just over 1mm fully compressed
im thinking unless i take a blow torch to the ballscrew (y axis) i should be ok
if not it should run long enough to machine myself out of trouble
i thought id designed this machine to perfection :) however... i snapped up some cheap 20mm profile rails for the Z axis instead of the 15mm in the design and its had more of a knock on effect than i exspected :(
iv got this funny feeling ill be seeing a few more of those before im done :)
I guess you could always loosen and re-tighten the grub screws between the coupler and the ballscrew twice a year to take out any stress. Or you could mount the stepper on a sliding arrangement so that rotations were prevented but it could slide back and forth 0.5mm or so.
It'll work - just do it.
If all these MDF, draw slides, all thread screw jobbies work what's the problem.
Never let the decimal point stand in your way.John S -
you can get rubber mounts for steppers, that simply mount between the stepper and the frame, giving a slightly flexible yet resilient mount.
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