Hi,

I am building a 4’ x 4’ cnc to work with wood and aluminium. Planning on using 25mm hiwin guide rails.

I am quite puzzled selecting the rack and pinion system for x and y axis.

Should I go with a straight or angled gears?

What pitch should I select? I was thinking module 1.5 but not 100% sure what the implications are.

Thanks for your help.

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