I have not experienced any problems with lost steps using the MSD542 drives. I did check for this when setting up the drives by running a program repeatedly and with a dial test indicator verified the position at the end of each cycle was exactly the same. I have the current set at 3A which is below...

Hi George I acquired an Orac lathe last year. All of its control system/ power supplies were missing. I have since converted it to run off Mach3 (fantastic) software with all new electrics. I used the existing stepper motors and installed two MSD542 microstepping drivers and a PS407 power supply bou...