Mitsubishi M01 0105 alarm: Spindle stopped during synchronous feed

Mitsubishi detects that the spindle has stopped during synchronous feeding or threading. It is an alarm from the Spindle area, and in the catalog it is listed as “Spindle stopped during synchronous feed”. On the machine you notice it like this: Fails during threading or tapping, Husillo pierde giro, Alarm during synchronized advance.

On the shop floor it almost always comes from one of these causes: Spindle encoder, Spindle drive, Carga excesiva, Incorrect command/program. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset after safely removing the tool/piece and correcting the cause. Resetting without fixing the cause first only hides the problem: Mitsubishi M01 0105 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: Parar ciclo, Check tool/threading, Check encoder signal and spindle status. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Mitsubishi M01 0105 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 it fails without load or in all synchronized cycles. 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.