Mitsubishi M01 0107 alarm: Spindle speed exceeds clamp limit

Mitsubishi detects spindle RPM above the allowable limit during operation. It is an alarm from the Spindle area, and in the catalog it is listed as “Spindle speed exceeds clamp limit”. On the machine you notice it like this: Alarm when commanding high RPM, Fails during threading or CSS, Spindle stops for protection.

On the shop floor it almost always comes from one of these causes: S programada demasiado alta, Clamp limit not defined, G96 without correct limit, Encoder/gama. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset after correcting RPM/limit and with spindle stopped. Resetting without fixing the cause first only hides the problem: Mitsubishi M01 0107 trips again and, in the meantime, you keep working with the machine in bad shape.

With the machine stopped and in a safe state, start with these checks: Check S and RPM limit, Check G96/G97 and the rpm clamp, Check the maximum speed of chuck/tool. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Mitsubishi M01 0107 active, avoid this: Do not bypass safety devices, Do not manipulate energized electrical cabinet, Do not continue producing if the alarm reappears. Skipping any of these points is what turns a minor stop into an expensive breakdown.

If the rpm reading does not match or there is a gear/encoder fault. If you are not sure how far it goes, stop the machine and report it: a repeat alarm always works out cheaper than a crash.

It is critical: there is a real risk of damage to the machine, the tool or a person. Leave the machine stopped, do not keep resetting it to see if it goes away, and call maintenance before producing again. Guidance reference. Always confirm the full text in the exact machine/control manual.