Printrbot Simple Metal USB protector, to save your Printrboard. The flaw of the printrbot that we mostly fear is the relative fragility of the USB port, this brace lets you secure the cable in such a way that you cannot break the port right off the board so easily.
This hack requires taping ( threading ) the metal body of the printer, as there is no space inside for a nut. Alternatively you could glue the brace in place.
2.4mm metal drill bit
3mm thread tapping tool
2x M3 5mm long screws
Small zip tie
Unplug your printer USB and power, then tilt the printer on its left side so
USB port is on top.
Place your USB cable into the brace and tighten the ziptie so the cable is firmly secured but can be edged forward and back a little.
Connect the usb and line everything up.
Mark where the holes should be drilled with a pencil.
Unscrew the printrboard so we can drill without damaging the electronics.
Now drill with a 2.4mm drill
Carefully remove all metal shards from the area
Now tap the holes with the M3 tap
Remove metal shards again
Now reinstall the printrboard, and do a test fit. If not lined up with the screws holes, you can oversize the holes in the brace with a 4mm bit.
Final fit, don’t over tighten!
The connector should be permitted to move in and out, so ensure the ziptie is not too tight, otherwise you will put too much pressure on the PCB!