Here's my enclosure... It's actually a wall mounted 19" server rack that I added feet to... It has access panels on the sides and doors on the front and back... I have yet to add a heater, although so far my ABS prints have been pretty good without it...

So in my case, I had repeatability issues using the same spool of ABS, the same settings,etc... My Z limit snap switch maybe worse than others... Although snap switches really aren't designed for precise positioning. Anyway, regardless I think that replacing it is not an unreasonable upgrade. My new...

participate in the development Color me interested... Gotcha 1: mechanical backlash The Z axis microstep is 1/400 mm = 0.0025 mm, but the backlash on my M2 runs around 0.01 mm. I'm certain that will vary with the machine's age, due to wear from the load on one side of the threads in the brass leads...

Well, the goal here is to improve the repeatability of z-axis homing. The micro switch that was supplied with the machine has repeatability issues... If you extrude too close to the table on the first layer, the results can be less than desirable. Worst case, you can block the extruder... Anyway som...

It struck me that homing the Z axis (the bed) is the most critical homing operation... I have has some inconsistency so I wanted to replace the switch with a opto... What I need to know however, is how to change the firmware to allow it to recognize a Normally Closed contact as oppose to the Normall...