I'm trying to get a mr-j2s-40a servo amp to move the motor with no luck. i have read every scrap of information i can find but no luck. one strange thing is i can not get servo on or the end of stroke limit switches to activate via parameter 41 unless i actually hook them to ground. even then if i send a pulse train no movement. i have tried 3 different amps. i have hooked emg to sg and vdd to com and also hooked opc to com on cn1a. i have pulsed pp and sg together and no movement. any ideas or suggestions?