Hi all
I am new to this forum.I have a HY-TB4DV-S control board with MACH 3 for my CNC machine. In that, spindle motor is controlled by a separate unit. Now i want to add a 12 V DC relay with this control board and like to control the relay using M03, M04 and M05. After modifying the pin, port numbers and motor output without connecting the relay i tried with M03. Now i am getting a 'click' Sound which refers the relay is activated, but i didn't get any voltage in M1 ,M2 and Ground pins of my controller. [/b]So, please tell me what is the error and how to solve it. attached is the photo of my control board.