CNC Machine - PS8 Steam

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Experimenting with CNC and a proposed CNC Mill

I have played with an Arduino / GRBL controller and three stepper motors and it worked for a time.  The cheap (probably) Chinese stepper motor drivers are not reliable and one has failed already.   What I would like to do is build a better controller and three more reliable stepper drivers.  This Old Tony used a PMDX-424 controller and that seems to do the job.  It also works well with Mach-4, the CAM software.

Not having a 'proper' CNC mill, I bought a simple very cheap three axis engraving machine off eBay.  That works and there is a video alongside of me trying to get it working.  Lots of problems with the Z height setting, but enough to prove it ought to work.

PMDX-424, power supply, and stepper motor drivers all assembled in die-cast enclosure.  Mach 4 installed on the laptop and it actually all works!  Next job is to fit the three stepper motors to the simple 3 axis framework.  A short video of the controller working from Mach-4 is alongside.

(C) 2018 Kevin Murrell
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