stepper motor overheat

Hi all,

I'm using the legacy motor CTP10xxx10 with motor drive P70530, on page18 the manual says "...If an equivalent heat sink is not used, reduce the default drive current for these motors by 25% to avoid overheating...", I did this by creating a new motor file using the file editor and entered the lower current into the box for "motor current" (the amps peak is auto-calculated). But the amount of heat is still large.

My question is: do I need to modify the "peak torque" below as well? And how?

Thanks in advance,

-chen

p.s. After I modified the motor file and performed a "Probe Stepper Motor", an error will show up, so I'm not sure the modification takes effect or not at all. Please any help is appreciated.