The Mesa 5i25 (not required for UCCNC option described below) The G540 Kit including 7.3A 48Vpower supply, E-stop, relay, power socketsĤx breakout boards to set driver current to Steppers In hindsight the G540 is perfectly capable for the Shapeoko, there was no need for the 5i25. The Mesa 5i25 is a motion control card that allows ‘realtime’ control, meaning zero lag at incredibly high feedrates and step frequencies. The G540 is basically a parallel port breakout board with 4x 3.5A drivers, but in a small robust package. I decided to try LinuxCNC because it’s free and incredibly powerful. I didn’t have a huge amount of knowledge of drivers and software but my research got me to buying a Gecko G540 kit from an Australian distributer, and a Mesa 5i25 PCI-E card. I made the decision to upgrade the control system. During this time the XXL was released so I sold the original SO3 and bought the XXL – the intermittent disconnects were still an issue C3D were great, sending me new revisions of the (at the time very new) control board, new cables, and many other suggestions that improved the situation, but didn’t complexly resolve the issue. So my story starts with one of the very early Shapeoko 3s, and due to the old, poorly maintained electrical circuit in the rental house I was living in I had a huge amount of issues with disconnects.
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