Hi Imran,
Thanks for your thoughts.? I have disconnected what I presumed was the offending motor.? Made no difference.? I have checked resistance across all three fields of each 3 phase motor, 1-2, 1-3, 2-3.? Everything there is normal, no red flags.? I attached the Table Saw motor to the Shaper position on the selector switch, and that motor runs just fine from that position on the selector.
I then wired the Shaper motor to the Table Saw position on the selector switch and, predictably, it would not start.? The Shaper motor works fine connected to its regular location on the switch.
I have also checked continuity on every switch on the machine.? All three safety micro switches, all three stop buttons, all three start buttons.? No failures indicated, at least in continuity tests.
I have made videos of each motor starting and stopping, focusing on the two relays which sequence with the Inverter.? The progression goes: Push start button, K-1 closes (a pair of paddles are visible in a window), the Inverter sends a start signal which closes K-2 (visible by a latch the pulls in when closed and audible from a loud click that latch makes), motor spins.? Push stop, K-2 instantly closes, K-1 remains open until the Inverter decides braking is complete, and then K-1 closes
My next move is to remove the Table Saw stop button from the equation.? Since these are wired in parallel, taking it out might answer the question of whether it is at fault.
Until then, I'll look at Annu's posts.
Thanks,
Greg
