Hello,
I am upgrading my cnc milling machine with better linear rails and a ball screw instead of the lead screw I was using. Now axes runs much smoother and nicely, but when I fit the spindle, the Z axis tends to slide down. I haven’t fixed the stepper motor yet, but I don’t think that will improve much the situation when it’s off.
Total weight of the axis is less than 10kg but anyway enough to create this problem.
I have seen some machines have installed gas springs to avoid this problem, but I struggle to find a gas spring with less than 100N force and 300mm stroke.
Is there anybody that have some other suggestions?