Hot End repair holder

thingiverse

This holder makes working on your hot end easier. If your hot end is clogged for instance, you can remove it from your printer to make it accessible again. However, it's not very handy for heating the hot end up with cables still attached to the printer. To make the hot end more accessible I created the "Hot End repair holder." Now you can remove your hot end from your printer and place it into the "Hot End repair holder." This holder also has the option of heating your hot end so you can work on it in a hot state, which will be useful for unclogging or assembling your hot end. The temperature of the hot end is controlled by an Arduino Nano that you can connect to the NTC of the hot end and set a maximum temperature in the included Arduino sketch. See the picture of the screen where to set the maximum temperature in the sketch. If the Arduino is connected to a computer, you can see the measured temperature in the serial monitor. The Arduino can also take power from USB, so if everything works properly, you won't need a computer anymore and there's an option to give power to the Arduino from the 12V that powers the heater of the hot end, as shown on the schematic with red lines. The heater of the hot end is powered by a 12V ATX power supply from an old computer and a FET. This FET is triggered by an optocoupler, which is triggered by pin13 of the Arduino, as shown in more detail on the schematic. The Arduino Nano may be a bit hidden in some pictures because my DIY PCB for the heater circuit is in front of it. In addition to the Arduino and electronic components, you'll also need 2X M3x10mm and nuts. If you use the small bracket to hold the Arduino in place, you'll also need a small "wood-like" screw.