I'm building a Hobby CNC router but am freely changing various aspects. The X & Y lead screws are supported at one end by the stepper motor. I would suspect that it would be better to support both ends with a bearing rather than using the bearings of the motor to support one end. I would also suspect that the smaller the motor, the more of potential for problems could exist.
Would this really make that much difference ?
David J. Morrow
Your are correct, it is NOT a good idea to make the motor do double duty as an end support. It's bearings aren't suitable for axial loads (or for additional radial loads for that matter).
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