[neurofen]

.. im building my first cnc and i think the easiest(cheapest) way of mounting the x axis stepper motor is to put it on the top of the gantry and run a timing pulley to the ballscrew which is on the front face.

am i likely to be loosing accuracy and torque if a decide to use a timing belt and pulleys?

I'm pretty sure the best way to go is to attach the motor directly to the ballscrew via a coupling which i have.. its just that its likely to cost a lot more to manufacture a motor mount that will fit to do it this way, and my budget is now almost zero.

i found these

http://www.diycnc.co.uk/html/mechanical.html

the 350mm 5mm pitch 15mm wide high torque timing belt and 2 of the htdw24 pulleys.

and on rs online i found
product codes 474-6047 (timing belt) and 745-696 (pulleys)

i found a load of discarded L shape alumium angles which would make an ideal bracket for the motor on the top, all i have to do is cut them back slightly and drill a couple of holes.


are there better, more acurate types of timing belts? the ones on rs online are Polyurethane whilst the ones from diycnc are a different colour