Today I started on the extruder nozzles. These are made from 360 Brass, which is super easy to machine. I'm saving the threading for later, as I want to grab what will wind up being the threaded section in a collet to turn the tip. I'm aiming for everything around the actual orifice being no thicker than .020". I used a straight flute carbide bit to get the holes very smooth for lower friction, and with a known angle at the bottom (135deg).
More goodies continue to arrive. I decided that the non linearity and tiny size/delicate wires of the thermistor were going to be a problem. Above is the AD595CQ which will go with the bolt-on thermocouple behind it. I still have to come up with a board for this, I am going to try to come up with a single sided shield for the Ardunio to hold this, the FET's for power driving, and stepper output terminals.
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