Saturday, August 12, 2006
Progress on extruder
I had a conference this week so didn't do much again. This morning I afghan-lathed the PTFE rod, heater tube and nozzle. So that's the extruder complete now except for the heater wire/thermistor.
It looks like some weird laser pistol or something.
Sunday, August 06, 2006
I'm starting with the Mk II extruder before I embark on making a Repstrappable version.
I assembled the top portion today. It took quite a while to do because it requires some lathing. The bottom half can wait for another day.
Saturday, August 05, 2006
I did a little fiddling and reduced the wobble:
It's around half a millimetre but it still needs improving. The problem is caused by the connection between the motor shaft and the studding shaft, which is slightly off-center. That's because I'm using plastic tubing to connect the two and the weight of the X axis assembly distorts the plastic tubing. It holds the distorted shape to some degree so it wobbles.
The X axis wobble is essentially completely gone now and that was the worst before, so this is a good step. It needs some more work. I may be able to re-inforce the tubing so it doesn't distort.