Why Does JACK A4B Show Err-12 Initial Motor Angle Failure?
Exact model: JACK A4B-A/C
Safety: Disconnect mains before clearing thread or checking motor/solenoid connections.
A.
Start with the accessible checks
What this suggests: Err-12 on RA6 is an initial electrical-angle detection failure; the RA6 manual lists a P62=2 initial-angle measurement mode, but that is NOT a complete safe recalibration procedure.
What to do
- Check controller revision, free handwheel rotation and encoder/motor cable seating with mains isolated.
- Repair a loose feedback connection or obvious mechanical binding first.
Still not fixed? Continue to the next check.
↑ Back to the repair pathsB.
If the problem remains after the first checks
What to do
- Only a technician with the precise RA6 motor setup and safety sequence should enter the initial-angle detection mode; do not ask the user to set P62 arbitrarily or substitute angle values from another machine.
- A damaged feedback part must be identified before replacement.
Confirm the repair
The machine initializes and runs smoothly without Err-12, with positioning and safety functions verified after any service calibration.