Quote Originally Posted by BriceO View Post
I mean which lead should I take, 20 or 10mm lead? I calculated a max speed of 500 IPM, does it seems to be correct? And do I need to have a ballscrew preload ?



I planned to run the ball screw behind the gantry for this axis, but you're right I'll change it for the L shaped gantry.

For the longest axis, which one is the "best" design?
Add a spacer to the ballscrew. The ballscrew runs behind the plate and this plate will be near the bearing blocks. Something like this:

Click image for larger version.  Name: ballscrew1.png  Views: 1120  Size: 1.63 MB  ID: 23117
Hmm don't really understand but is "lead" the same as "pitch"?
Have read a lot about lead on the zone but that seems to talk about trapezoidal screws and not ballscrews?
Anyway what do you want to cut and in what resolution?

If you plan on having the ballscrew on the outside of the plate as in the picture then please don't forget that the screw must be longer then the calculated travel as the plate will travel inside the bearings :)

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