Quote Originally Posted by Jonathan View Post
The real problem with using 4mm pitch instead of 2.5mm is you will loose resolution. One turn of the motor with a 4mm screw would move 4/2.5=1.6 times as far so your resolution will be 1.6 times worse. However if the ballscrews are driven from the motors via timing belts you could put a smaller timing pulley on the motor to compensate and end up with the same value for step/mm overall. You need to decide if you require the original resolution?
Hi Jonathan,
Thanks for the quick reply (and the Mechanic/Math lesson) :-)

There are defferent pitch available on 14mm ballscrew from this vendor.
They can also provide 2mm pitch. Woult that be better option then ? (I guess it would make the mill a bit slower... but I've got time, I am not runing a production line... ) :-)

Laurent