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Are these related to a too low VREF value? : r/FixMyPrint
Vref Calculator: How to Tune Your Stepper Driver | All3DP
BIGTREETECH Direct TMC2208 V3.0 Stepper Motor Driver UART Mode 3D Printer Par... 787794452450 | eBay
Stepper Calibration: Tune Your VREF, Steps for Perfect Prints! - Inov3D