8901 Better - Fanuc Parameter

Locate the setting page where is displayed.

Change the 8901#0 bit from 0 to 1 to mask the 701 alarm.

When the control unit's upper fan motor fails or slows down, the CNC triggers . This alarm is a safety mechanism designed to prevent the internal electronics from overheating and suffering permanent damage. Why Use Parameter 8901? fanuc parameter 8901 better

: Temporarily shields or releases the ALM 701 (control unit upper fan overheat/failure).

1 System fan, 701 alarm, 8901#0 parameter is changed to 1 to temporarily shield the alarm (OIC system); Dongguan Jide Precision Machinery Technology Co., Ltd. Locate the setting page where is displayed

Do not let a legacy default setting sabotage your productivity. Talk to your lead machinist, review a test machine, and change Parameter 8901 to 1. In one work shift, you will wonder why you didn't make it better years ago.

Is the 701 alarm pointing to the or a fan on a servo/spindle amplifier ? This alarm is a safety mechanism designed to

If the goal is better surface finish, adjusting parameters related to AI Contour Control (AIAPC) or Nano Smoothing is more effective than just changing speed parameters.

A DMG Mori CMX 1100V with default 8901=0 produced erratic thread pitch on M6x1.0 holes deeper than 20mm. Pitch error varied by 0.05mm.

If you are experiencing Alarm 8, 9, or A , it signifies an abnormal current or a short circuit in the amplifier or motor, which requires immediate hardware inspection rather than parameter adjustment.

Operating without cooling can damage the internal power modules, forcing expensive replacements of the entire drive unit.