Thread: How to choose a lead scew
Hi, just hoping to draw on your experience.
I have just decided to start my design for a router. I want a working area of approx 1000mm x 1000mm, and will mainly be used for wood but I can see the need for some aluminium work.
I am going to base the final design of the router around components I can readily get, but I am having trouble deciding on the size of lead screws I need. I was initially thinking about 16m x 5mm pitch but I am unsure whether I should increase this to 20mm or 24mm.
Also I was thinking about placing the X axis lead screw central under the moving gantry and using a ball screw, but would two trapezoidal lead screws running either side of the gantry work as well and be of a similar cost?
I understand that having two ball screws on the X axis would mean two motors.
Any advice would be welcome.
Z axis is a 16mmx 5 ballscrew and works brilliantly throwing around a Makita 3612c.
Steppers are 3Nm from Zapp's excellent Driver Kit 1.
Cheaper alternative (but just as good IMO) is what I chose and that is a rack and pinion drive.
I get rapids of up to 4m/min stable but turned it down to 3.5m/min.Nothing is foolproof......to a sufficiently talented fool!
Hi Smiler, I have read through many of your build log and found it very interesting, especially your choice of materials and you have produced a very good machine.
I think I’ll up the size for the X and Y axis and leave the 16mm for the Z. Time to start looking around and comparing the prices of lead screws.
The next thing are the Slides.
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