Hi. I have recently incorporated TCM2208 drivers to my machine. And I have found this: 12V is not enough. Steppers were weak, loosing steps and in standstill, they screamed in StealthChop2 mode. Then I used Dell charger 19.5V/4A just for steppers. Torque is much higher now. When printing and moving fast (120mm/s and 200mm/s), steppers were loud. But when I lowered current (from 0.9A to about 0.5by kolin - Stepper Motors, Servo Motors, DC Motors