8mm PEEK tube drilled to 3.2mm
Lower PEEK hole drilled to 4.5mm and M5 tapped
0.6mm Welding tip drilled out to 3mm
8Ohm Insulated Nichrome wire wound directly round the welding tip
Heater sealed in fire cement
Thermistor leads wrapped in PTFE tape for insulation and embedded in fire cement
Screw in welding tip and wind nichrome directly onto welding tip
|Cover the windings with fire cement and harden. Poke in the thermistor.
I cut a notch in the end to help mount it.
using the notch, a few washers and woodscrews allowed a temporary mounting. I added a small silicone insulator and a pipe clip for strength.
Testing - ABS - score 9/10
Reached 250 degrees easily: low thermal inertia . Warms up in 10 - 15 seconds
hand pressure extrudes filament easily