Sensor One-Rotation Signal Undetected

What does SP0141 mean?

No absolute position is established within 5 turns immediately after communication between the spindle amplifier and sensor is started. This indicates a failure to detect the absolute reference mark.

• The control system is not receiving the expected signal indicating one full rotation of the motor or shaft.
• Damaged or misaligned encoder or resolver.
• Broken wire or poor connection to the one-rotation signal output.
• The speed of rotation is too slow or too fast for the sensor to detect a full rotation reliably.
• Faulty sensor that only provides partial rotation feedback.

Click steps to track your progress.

1. 1

   Verify the proper connection and alignment of the spindle sensor (e.g., αi position coder, αiBZ sensor, αiCZ sensor).

2. 2

   Ensure the sensor ring is not deformed or damaged, particularly the Z-phase generation section.

3. 3

   Check for mechanical backlash between the spindle and detector, as this can affect one-rotation signal detection.

4. 4

   If the sensor head was moved, perform the procedure applicable when the sensor head is moved after conduction (Section 11.1.1.6 or 11.2.3.9).