This is a small, high-performance designed for 1.75mm filament. It was designed with two goals in mind: speed and size.
- Small size
- Hybrid PEEK/PTFE liner for strength and low friction
- Aluminum nozzle and heater block for optimal heat transfer
- Power resistor heater
The odd end takes inspiration from two existing designs, the MakerBot mk7, and the MakerGear v3. I liked the size of the mk7 (it's ~15mm shorter than anything else common), but didn't like the stainless steel thermal barrier. And I love everything about the v3 except it's length. So I combined the general form of the mk7 with a hybrid PEEK/PTFE thermal barrier, and a set screw for retaining the PTFE (as in the J-Head design). I also used a mk7-style butt joint between the thermal barrier and the nozzle. Initial testing hasn't showed any signs of leakage.
Bill Of Materials
|PTFE Liner||Hardware||26mm||McMaster-Carr PN: 52335K32|
|Hollow-Lock Set Screw||Hardware||1||McMaster-Carr PN: 91318A350|
|Power Resistor||Electrical||1||Digi-Key PN: UB5C-5.0-ND|
|Thermistor||Electrical||1||Digi-Key PN: 495-2125-ND|