Unclogging a Dremel 3D45

From time to time, 3D printers will clog. It's a fact of life. 1.75mm filament being forced through a 1.9mm path means that any thermal expansion of that filament could create a logjam.. or a clog/jam!

What causes a clog?

1. Printing when the nozzle is too close to the bed on the first layer, causing a buildup of pressure
2. Trying to print too quickly, at too low of nozzle temperature, or both
3. Overly hot/humid environment the printer is in
4. Poor heatsink cooling
5. Old brittle or moisture ridden filament
6. Inexpensive / poor quality filament

Amazingly, this list is not exhaustive of every single scenario that might result in a clogged printer. The "clog" might also not be in the brass nozzle itself.. it could be higher up in the extruder assembly.

Preliminary Steps

We recommend you check out the 4 step process from Dremel. These are the easiest fixes so if it solves your situation, all the better!

Last Resort

1. Turn off the printer and unplug it from the wall
2. Remove the extruder assembly top cap
3. Unplug the top cap (filament sensor) and set it aside
4. Unplug the E motor
5. Unscrew the E motor, set it aside
6. If applicable, remove any bits of filament in the top of the heatsink, or sticking out of the bottom of the extruder assembly

Last-Last Resort

Replace the entire nozzle assembly. 3PI Tech sells the nozzle assembly for $69.99, which includes:

• Heatsink
• Heater block
• Heatbreak tube
• Nozzle
• Heater cartridge (white wire)
• Thermistor/thermocouple (blue wire)
• Kapton tape and ceramaic insulator
• Rubber nozzle protector