How to connect a stepper motor driver DD8727T4V1 to a controller DDCS V3.1. The driver has a common + input for all PULL and DIR control signals. If you combine all the positive motor control ports of the controller (as in the picture), the motors either do not spin, or several motors are running simultaneously. The driver is OK. Tested with mach3 stb4100 usb board before and after connecting to DDCS V3.1.