DRV8825 - can't change the vref - Motor controllers/drivers and motors - Pololu Forum
Are these related to a too low VREF value? : r/FixMyPrint
Mega 2 3 4sets Mks Tmc2225 Stepper Motor Driver V1.0 Module Ultra Silent 3d Printer Parts Stepstick For Replace Tmc2208 Tmc2209 - 3d Printer Parts & Accessories - AliExpress