Hi,

This is probably a perennial question.
I have a CNC3018, it came from BangGood via Czechia.
The Stepper controller board is totally unmarked (no branding or model numbers etc.).
As are the steppers themselves, though I'm guessing they're some variant of NEMA 17.

The board seems to be made by someone called RATTMMOTOR

All I really need to know is :
1) How can I determine the current rating of the steppers.
2) Can I adjust this driver board to use steppers with more or less current?

Please see attached photos

thank you