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Just a close-up of the drive gear. This attaches to the extruder motor. The filament is pressed into the grooved channel by a freewheeling bearing on a spring loaded part; as the motor turns, the grooves grip the filament and push it through the "hot end" which melts it.
After overheating the MOSFET on the extruder controller repeatedly we added a heat sink to it, but it still overheated. We then wired up this Hella (probably for a car horn) relay and used the 12v from the power supply to power the HBP. Now it works great, and maintains whatever temp is specified in the gcode or the control panel.
Yes, some of those vertex pieces are Red, White, and Blue, in a single print. My dad has fast hands when it came to switching filament.
I've been working on my RepRap machine and printing a dodecahedron as a test object. You can download the 3d model here: www.thingiverse.com/thing:198 I've been working on my RepRap machine and printing a dodecahedron as a test object. You can download the 3d model here: www.thingiverse.com/thing:198
Dual Spiral Lightbulb Sculpture
www.thingiverse.com/thing:24646
More details on challenge here:
forums.reprap.org/read.php?282,137052
Timelapse at:
Print took 00:36:19
; generated by Slic3r 0.8.2 on 2012-06-15 at 13:03:50; layer_height = 0.3; perimeters = 2; solid_layers = 3; fill_density = 0; nozzle_diameter = 0.5; filament_diameter = 1.75; extrusion_multiplier = 1; perimeter_speed = 35; infill_speed = 60; travel_speed = 130; extrusion_width_ratio = 0; scale = 1
; single wall width = 0.70mm
Honey I shrunk the office chair! :S #3dprint #3dprinting #future #technology #tech #innovate t.co/MdLyJsDHVL via Twitter twitter.com/3dPrintAll