I'm just playing with it. The purpose is knowledge

 

Oke. So if I respect the recommended values and provide adequate cooling, manual moving the rotor in the reverse direction of its' movement is not really a probleem?

Essentially, you are "simulating" an overload, such as a stuck rotor, or some torque greater than the holding torque of the stepper. These things do happen in real life, but exert a bit of strain on the driver.

Think of a robot driving up a hill, and not having enough power in stepper motors to drive the wheels harder. At startup/physically cold, most can handle it. If the IC temp (actual IC die inside package, not the package itself), was already very hot, it could get extremely hot locally, causing something to fail.

I'd suggest a driver and steppers rated a bit over your highest anticipated loads and using good heatsinks to keep everything "no problem to touch" cool.

 

You will discover that the proliferation of safety devices, both active and passive, was also driven by that same experimental spirit.

(and the fact that hobbies get expensive real fast if you destroy all your parts while playing)



You sure you don't know my son?

 

I do have to take care not to break many things, but as I break things I learn better, I guess