You router is a serious bit of kit designed for tireless production work and as such carries a fairly hefty price tag. It can be expected therefore some sort of thermal cutout is incorporated, possibly integrated into the electronic feedback module.
Clearly something is cutting the power and only running the motor with covers removed so the supply to the motor can be monitored at different points of the circuit with a suitable multimeter can be certain to discover the cause.
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You router is a serious bit of kit designed for tireless production work and as such carries a fairly hefty price tag. It can be expected therefore some sort of thermal cutout is incorporated, possibly integrated into the electronic feedback module.
Clearly something is cutting the power and only running the motor with covers removed so the supply to the motor can be monitored at different points of the circuit with a suitable multimeter can be certain to discover the cause.