Stepper Motor heat (issue or not)?

I've got a Vexta Stepper (3A 3V) motor, connected to a G201 (3 AMP
setting).



And when I start the motor moving up its gets really hot. hot enough
that I don't want to touch it.



But it's moving, and holding strong.



It's not spinning fast, but it is getting 42Volts from my power supply
(as calculated, and measured by my volt meter)



Should I be concerned about this?



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