These past days I've been trying to fix these errors that I got when I push Jog/Retract using a AMD-115G on an Auto Axcess 300 and an Auto Invision II. The tachometer that they have is an optoswitch with a holed wheel on a circuit board (Digital Tach LE-44 PCB 178470 encoder P-136-49-MSHA 3C SJOOW Cable Motoman) probably is not working well. Any idea of what possibly could be wrong?