z probe arm for auto bed leveling
- 80s panasonic dot matrix print carriages (X and Z)
- wood frame
- an 80s hp plotter pen selection motor (Y)
- a lightly modified atx power supply
- 90s plotter spool and cables (Y)
- game controller rumble motor with rc car gearbox for z probe deploy/retract
I bought this kit from ebay
- arduino is a fake, though branded as real. I don't think there would be silk screen errors on a real one.
- Ramps is spelled wrong on the board, so they must not be using the same board files
- The motor drivers have pots with dead zones and no stops
- The fit was ever so slightly off for all components, but all fit with wiggling.
- 26awg kanthal
- 20mm wide kapton tape
- 2mm id 4mm of ptfe teflon tubing
- glass thermistor (marlin table 1)
- 1/4" threaded rod and washers/couplers
- bed leveling is not working perfectly
print pics <-- More pics
Hotend / extruder
3d_print_head Printer extruder and hotend info
Attempted to use:
- 1991 jeep cherokee coolant sensor (worked until it melted)
- powermac g4 120mm fan speed control thermistor (Worked, turned black though)
- Now using normal glass 3950 ones.
Guide and maps: How to calibrate temp sensor in marlin
3d_printer_bed <-- More pictures of the print beds
(old) auto bed leveling probe
used two servo output pins (d4 and d6) to deploy and retract a probe for auto bed leveling. The digital pins are wired to an l293d chip and powered by 5v. the motor is a rumble motor hacked on to part of an rc car gearbox. the probe arm was printed and attached to the output gear.
This thing was great when it worked, but it was prone to jamming and would often crash the head into the bed. Removed and went back to an adjustable z probe.
(old) adjustable z stop
The upper block has a loose screw through it to pull it down against the spring on the bottom block. With a microswitch on the top block and the bottom block anchored to the frame, this functions to adjust the height of the z end stop.