M41 / M42 Low / High Gear Override

Next Generation Control Mill Operator's Manual

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On machines with a transmission, M41 holds the machine in low gear and M42 holds the machine in high gear. Normally, the spindle speed (Snnnn) determines which gear the transmission should be in.

Command M41 or M42 with the spindle speed before the spindle start command, M03. For example:

% S1200 M41 ; M03 ; %

The gear state reverts to default at the next spindle speed (Snnnn) command. The spindle does not have to stop.

On machines with a transmission, M41 selects low gear and M42 selects high gear.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.