The 3D model is designed with Fusion360.

I use Fusion360 CAM.


【Material, Endmill, Condition】
Process with CNC milling machin was done with following condition.

Material: Brass
Endmill: 4mm
Feed Speed: 300 mm/min
Cutting Depth of each step: 0.1mm

I tried hotend tempreture control with cartridge heater and thermocouple. Cartridge heater can raise its tempreture　up to 400℃. But the hot end itself only got up to 200℃.(It needs about 300℃ to melt plastic bottels) The reason is thought as follows.

• clearnce of hole is too big. I used 6.5mm drill and cartridge heater's diameter is 6.25mm. So, gap is 0.25mm.
• hot end is too big to heat...
• cartridge heater' power is too weeak

【What I will have to do】 Increase hot end temperature to 300℃! To do so, I will make a 6.3mm diameter hole at first.