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Danny's Corner

Repairs, printed brackets, and wiring

Spent a bit of time to design and print out some simple prototype bracketry to make my life a little easier as I begin my rewire project for the Shapeoko. I still haven't figured out how I'll arrange these items permanently, but I think form will follow function and a layout will present itself as I go along.

Overall, the parts managed to print out pretty well, but not great. My blue printer needs a bit of tweaking for the PETG filament I'm using. Seems I'm still over extruding, but the rest appears to be firing on all cylinders. The metal shelled connectors I'm using all slotted home just fine and look pretty dashing with their labels above. I'm surprised that the word "Pendant" came out legibly.

Here's a closer shot of the Arduino mount I made. The mount holds not only the Arduino but also a 30mm fan. One of the challenges of using a Gshield is controlling the heat pouring off the stepper driver ICs. So I've added heatsinks both to the top of the ICs and much larger ones to the bottoms of them. The heatsinks on the tops of the ICs will probably do next to nothing, but the bottom ones will be really advantageous. The overall design is going to change a bit more, but as a prototype it's working out pretty great.

I also began working on some of the wiring itself and fashioned out 5 terminated leads that plug into the Gshield and the Screw shield stacked onto the Arduino. My soldering skills need to improve, luckily heatshrink will forever hide my crimes.

Sadly, while my small creations worked out pretty well, something I purchased well over a year ago but never used was defective. The 24v 10A power supply I will use to power the steppers was damaged during shipping. The outer enclosure had a pretty good dent in it and sadly it made noise when I shook it. The toroid coil inductor had broken off the PCB. I fixed it, but I'm not so confident in the power supply. We'll see. It does power on, delivers volts as designed, and didn't catch on fire or go up in smoke during the hour it was turned on. But it's just hard to trust it now?

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