I use a timing belt on my 4th axis. Last night I noticed it moving a tiny bit while making a cut. I messed around with it a looked at a bunch of things before I found the problem. The belt "teeth" (Not sure of correct names) are slightly smaller than the "teeth" on the pulley, This allows it to move back and forth.
Is there a belt/pulley combination that I can buy that will eliminate the backlash or reduce it?
I am using a 270oz stepper motor and am using a 16 tooth pulley on the motor and a 48 tooth on the 4th axis shaft. I am using the pulleys to gain a little accuracy. Is there a better way to make the 4th axis?