DIY CNC Milling Machine (Part 10) – Building a DIY Power Supply & CNC Machining the Z motor mount

In this episode I use my brother’s CNC router (that he originally built for making guitars) to machine out the Z axis motor mount and I build my own 70 volt DC power supply for the stepper motors…

Transformer: Toroidal 750VA 230v AC – 24 x 24 AC output – wired in series – AirlinkTransformers.com
Vishay GBPC3504-E4/51 Bridge Rectifier
3x 4700μF 100V DC 35mm Capacitors
2x 1K2 5W resistors wired in series to discharge capacitors when mains power removed.

Still to do – Fuse the 48V output from transformer and individual outputs to Stepper Drivers.
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DIY CNC Milling machine build.

My objective for this project is to design and build a CNC milling machine without the need for any machining of the parts. Ordinarily, building a mill requires a much bigger mill to get the axis surfaces flat and parallel.

By using aluminum tool plate (which is in theory pre-machined flat) and bolting the critical components rather than welding, it should be possible to avoid any machine work. After all, I’m building a mill because I don’t have one!

Linear rails and ball screws are the cheap Chinese 20mm style that you can find on eBay etc.
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Music Credit
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No Quarter – TechnoAXE

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Dark vs. Light – – TechnoAXE

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