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CNC Build Part 5: Electronics #3DThursday #CNC

With most of the mechanical assembly complete.  It’s time to start wiring things up.

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All the wires run to the back of corner of the cabinet where the electronics will be housed.  I modified a PVC outdoor outlet cover with cutouts and added a foam gasket for the wiring.  This will help keep the dust out.  The doors are also gasketed and the air intake vent is fitted with a dust filter.

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The control computer is a recycled PC running XP and Mach-3.  I chose this older PC because it is ‘fast enough’ and has a native parallel port.

The motor controller modules are housed in a PC tower-case.  The ATX power supply provides power for the logic circuits and fans.  A separate 48v power supply provides power for the motors themselves.  ‘BOB’ the parallel port breakout board connects the motor controllers to the control computer via a parallel port.

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Mach-3 control software is installed on the control computer.  The monitor is mounted on an arm near the front corner of the rails for good visibility.

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Next 3D Thursday:  We’ll install the spindle and power it up!


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