If the servo motors are old or wearing out, they might drift slightly even when powered off. If the axis drifts into a hard surface while the clamp is supposed to be holding it, the control sees a discrepancy between where the axis should be and where the clamp sensor says it is.
. This occurs when the spindle switching conditions—often related to gear changes or high/low winding shifts—are not satisfied within a specified timeframe. Common Causes Winding Selection Failure: fanuc 7115 alarm
Instead of frantically pressing the reset button, Marcus followed the protocol etched into his memory. He opened the heavy electrical cabinet at the back of the machine. He ignored the labyrinth of wires and went straight to the spindle amplifier module. His diagnostic checklist was clear and unforgiving: If the servo motors are old or wearing
: Manually inspect the contactors for the spindle. Look for signs of burnt coils or mechanical jams that prevent them from pulling in. He ignored the labyrinth of wires and went
When this alarm occurs, the machine will typically initiate an emergency stop to prevent mechanical damage to the motor, spindle bearings, or drivetrain components.