[Al_The_Man]

I would assume you want to program pulses/degree? If it is a rotary axis.
First, how many motor pulses for one rev of the motor?, say 1600 micro steps/rev so one revolution on output of the 50:1 reducer will require 50x1600 = 80,000, so to get the pulses/degree will be 80,000/360 = 222.2222
Thats what it looks like to me.
Al