CCM5D PWM Motor Controller Case

thingiverse

Bench top CCM5D PWM Motor controller case. I needed a design that stood upright without sagging wires. This fits perfectly. The power button is located on the back, freeing up space in front. When you connect power to the CCM5D, it will turn on automatically anyway. If you want to shut it down, the button is there. The pot's mounting pin is slightly longer than other pots I have, and the current hole leaves only 1.5mm between it and the case exterior. You can either add a washer or two around the pot shaft inside the case or use a Dremel to grind off about 1mm from the pot mounting pin. I chose to grind down the pin myself to preserve its length on the shaft. Once done, the pot should sit straight. I used 14ga wire for the connections, but the screw-down connectors on the CCM5D couldn't accommodate the full width, so I trimmed them slightly. The CCM5D is supposedly capable of pushing 8a, so choose your wire size accordingly. The banana plugs I used are the smallest and cheapest available on eBay. There may be binding posts that look similar, but I haven't tested them as I don't have any. To install the banana plug jacks, remove one plastic surround and push them in. Solder the wires to the tabs and rotate them so they won't move during use. I designed retaining posts to keep the tabs captive. Where there's one post, the tab will be held between it and the wall. Where there are no posts, stick the tab in a corner. They should have minimal room for rotation. I struggled with getting clear text printed at small sizes, so I created some abstract symbols that might be decipherable. If not, here's a hint: A circle has an inside and outside. "Power in" is indicated by an arrow pointing inside the circle, while "power out" is shown by an arrow pointing outside. I was initially concerned about the design tipping over, but after printing it, the enclosure turned out to be quite stable. If you find it unstable, there's enough room for a low-tech solution like adding a non-conductive, dry rock for ballast. One final warning: Before installing the CCM5D, open the case and check that everything is in order. I found a loose metal washer from the factory inside the case, which could have fried something if power had been applied. If anyone knows what the two unpopulated headers are on the CCM5D, please let me know or leave a comment. I wish I could power this device externally to get an amperage reading that only includes the motor and not the CCM5D itself. One of the headers may be for external power, but it hasn't been a concern enough for me to trace out the board. FreeCAD source provided.