I decided to add simple reversing switch. I have seen similar mods on the net,
so I thought that it is going to be an hour job. At most. Apparently I was wrong.
Motor:
Type: 95D-1
350W DC Motor 230V
Class E Reverse
I have added switch DPDT - FWD/REV. When switch is in FWD position ir works
without any problem as before. When it is in REV position - it does not work.
There is no any indication on the motor that power is applied - no sound, no
movement. When trying to move spindle by hand it just turns freely without
any resistance.
How did I tested it so far:
1. Connected multimeter in parallel to the motor. Strange thing here - in the FWD
mode, when power is connected (but switch on the pot is in the OFF position) -
it immediately indicates +90V. Also, when you grab the spindle you can feel that
it gives more resistance in turning the motor in one direction. When turn the pot
to the right, passed the switch - voltage gradually changes from 90V to -90V and
RPM increases as expected.
When power is applied when the switch is in the REV mode - multimeter shows
+30V. When turning pot to the right voltage gradually changes from +30V to +204V
and motor does not work at all
2. I have disconnected motor from the controller, and connected to 12V DC
power supply. There was no any reaction from motor in both FWD and REV
modes.
3. I have connected motor to 4A bridge rectifier - again, no any reaction in both
FWD and REV switch positions.
4. When connected back to the controller - it works just fine, but in FWD direction
only.
Why it does not work as expected ? Are there any other tests possible to find
out what causes this problem ?
Any helpful answers will be much appeciated.