Quote Originally Posted by Ross77 View Post
Sorry I meant the ballscrew/leadscrew

With a leadscrew on each side and linked with a belt, (which you will need anyway with the ball bearing rails) then both sides would be moved evenly and should'nt bind.

but then again if you can get the bearing type then that will solve everything. I've got 20mm THK's and they are solid..

If you are still going to use the igus on the y axis then try to follow the design guide on the width to truck spacing ratio, also make sure the leadscrew is perfectly in the middle otherwise you will have the same problem with binding....especially with the 250mm z axis.

I would try again with the igus on the x axis with twin lead screws and use the bearing type on the y axis. just my 2 penneth

out of interest what are you using for the spindle?
I have not got any leadscrews yet, im just trying to get the frame made up and running smooth, at the moment the X axis is very stiff and would give the stepper motors a good workout.

i think i am going to run a motor each side on the X axis.

I have sort of fallen out with the igus bearings haha, the difference between them being sort of moving and locking up was half a screw turn on one of the carriages.

for the spindle i was looking at using a kress, are these any good for cutting aluminum?