I have built one cnc router machine using the "Ajax screws" , I guess that is the name. I want to build another but I want to use rack and pinions. Is there a relation between the motor speed ( I have NEMA 23's) and the tooth spacing on the racks?Similar Threads:Newbie- Direct Drive Rack and Pinion Removing pinion from CNCRouterParts.com rack and pinion drive unit Rack & Pinion Drive Belt Drive vs Rack & Pinion What rack and pinion for direct drive to use.
gear racks are typically dimetrical pitch, or metric, so there should be no guessing about this. if you take a 14 dp gear rack and a 14 dp gear of 14 teeth, one rotation should equal pi inches of travel.
You can use any rack and pinion and then domthe setup in your control software. just need to do some backlash compensation. mattcnc
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