I am building a new router with a footprint of 2.5’ x 4,5’ using a PorterCable7518 and aluminum profileslink. I went to check out some rack and pinion prices and options and basically my choice is between MartinSprocket and MartinSprocket, yeah. I have settled on getting 2 Martin Sprocket 6’ racks and it would be enough for X and Y axis, dual on X and single one on Y. Being new to R&P I am not totally certain about what pitch and pressure angle to choose from, I guess I am getting the ½ x ½ (square section) rack.
About the pinion, that pitch diameter is optimal? Some prefer the 1” pitch diameter and use a reduction from stepper to the pinion. What are the considerations here?
Thanks for you input.