Fanuc Parameter 8901 Better May 2026

Parameter 8901

In the world of FANUC CNC maintenance, is a critical bit-level setting primarily used to manage system cooling alarms, specifically Alarm 701 (System Fan Failure) . What is Fanuc Parameter 8901?

3. Block Processing Speed

• 8901=1 (Default): Cycle time: 2hr 45min. Surface finish: 32 Ra (rough). Visible step-over lines. Required hand polishing (4 hours).
• 8901=2 (Optimized): Cycle time: 2hr 50min (5 min slower due to corner slowing). Surface finish: 12 Ra (mirror). No visible lines. Hand polishing eliminated.

Enable Parameter Write (PWE):

Go to the SETTING screen, find PARAMETER WRITE , and set it to 1 . You will see a "P/S 100" alarm, which is normal when editing parameters. fanuc parameter 8901 better