Hi, i have a Micron3DP extruder that has 1168 step/mm on my machine (1/16th microstepping). In the Firmware configuration if i get over 999 step / mm (.e. 1168) the point is automatically deleted and the step/mm number become 1168000000 (zero plus or minus i cant remember the number, it was just big). if i stay under 1000 (i.e. 999 step/mm) the paramater stays correct.
Best Regards
Federico