Originally Posted by
nerics
Haas Spindle Regen resistor
Dear friends,
I started repairing a HAAS closed loop Vector Drive (Ref 69-1000 Rev AU), which had the 3-phase rectifier, the resistor that charges the main VDC bus capacitors (100 ohms 50 watt), one diode CR41 and the IGBT damaged.
I have replaced them all, except CR41. It has only on its body "ON 341 and U1J, would anybody know the characteristics of it?
I have tested the driver and spindle is working fine, it varies its speed accordingly. However when the speed is suddenly reduced, VDC to Servos (325VDC) ramps up up to 600 volts, what means REGEN resistor and electronics related to it is not working. HAve you had any similar experience ?
Thanks and regards.
Nestor Posada