Nomad 883 CNC mill upgrade – controller and 4th axis

Let’s be 100% clear, I love my Nomad 883 CNC mill, it got me started with CNC.  Now, I’d like to take it further by adding a 4th axis, however this is tricky as the Nomad’s controller, and standard grbl, doesn’t support it.  Fortunately, Paul’s developed a brand new ‘Super Gerbil’ 5 axis CNC controller (now […]

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The 3020 / 6040 CNC mill 1 day upgrade challenge

The 3020, 3040, 6040 and 6090 are low cost no-brand CNC mills that come in various 3 or 4 axis versions, but suffer from underpowered electronics and poor software.  So we’ve created the Super Gerbil controller as a high quality upgrade to the electronics and software tool chain.  For a bit of fun, we’ve challenged ourselves […]

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Basic steps to debug a k40 controller set up

Debugging the K40 controller set up consists of a few steps which are easy to follow. Comms Motion Limit stops Laser power You probably need: a small Philips screw driver for the screw terminals, a simple multi-meter and some gummy bears. First we need to test whether the board communicates with your computer. Best way […]

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Programming the PWM registers explained

Introduction The biggest advantage of the GBRL controller based on the 328PB chip is it’s ability to produce 16 bits PWM at various frequencies. However to harness that feature you need to understand how to program it. The problem of understanding and programming the 328PB lays in it’s multiplexed structure. There are not enough registers […]

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