I was using 8 mm metric screw to drive the axis of my small router The speed was not so disturbing for a small distance The max jog speed was about 6 mm per sec .Then I built a new router with a 1 meter long X axis but now I have a new problem :low jogging speed. I checked the cost of ball screw , rack pinion and belt drive but all of them require usd 100 per axis. So I decided to try steel wire drive method .I have tensioned a 0.2mm steel wire and wound it on a 8 mm steel shaft at 3 turns. With this way the motion transmission is perfect and there is no backlash at all.The only problem is linear motion of the drive shaft .When the shaft is turned it is forced to move axialy too .it is because of the wound effect of the wire. I hope I could describe what I mean . May be this picture help. The shaft will be directly driven with a step motor. Do you have any idea to compansate the linear motion of the shaft?
Murat..