After you can connect the GND (-) wires to the 24 V power supply directly to the motor. You must connect the + (RED) wire of 24V power supply to the COM pin, and the + (RED) wires of spindle motor to the NO pin. The COM pin is like common, the NO pin is like normally open, this is the pin that connect to COM when the relay is ON, the NC normally closed, this is the pin that connect to the COM when the relay is OFF. See figure and connect the pin of relay in this mode: See the figure for orientation of stepper drivers.Īfter this you can connect the relay.
#Coolterm for router serial#
After you can connect the Arduino UNO to the computer, and you can move the axis of cnc by using a serial command.Ĭonnect all the stepper driver to the X, Y and Z axis slots. You can mount this shield on top of your Arduino UNO. If the distance of CNC is different by the distance on the project file, you can set the step/mm value. After you can verify the dimension of movement. Set all the jumper close, and try the moving of machine. If you close all of jumper, like in figure, you have a 1/64 microstepping for DRV8825, and 1/32 microstepping for the A4983 stepper driver. I use ever the maximum value of microstepping. The jumpers, on the base of stepper driver slots, are the switch for setting the microsteps. Pay attention for the microsteps configuration. If after the mounting, the Z or X or Y axis not work, try to test this component. In the video I show two kind of stepper motor drivers. I use ever a passive component for cooling or better a little fan for cooling better this kind of component. The DRV8825 uses a radiator on top of main component for cooling the shield.
Moreover this electronic component need for active cooling. The stepper driver is a very breakable component. Also you can adjust the value of output Volts for use better the stepper driver. You can test if the stepper driver is good by using a voltmeter tester. In this project I use the A4983 stepper driver, and DRV8825 stepper driver. There are different kinds of stepper driver. Often the stepper drive (see figure), are mounted on cnc shield like CNC shield for Arduino or CNC shield for Arduino nano. All the stepper motors works together with "stepper driver".
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