Solidoodle 2 M3 Z-Axis Nut Holder

thingiverse

M3 nut holder for Solidoodle M3 Z-axis rod hack. See http://www.soliforum.com/post/127928/#p127928 for more background on the mod. It didn't appear that anyone had yet posted a Thing for the 3mm nut hugger so I created this up based on http://www.thingiverse.com/thing:159671 (thank you!). I projected the geometry and adapted for smaller M3 nut vs 5/16". I only printed one part. My tolerances were a little tight, so I heated an M3 nut with a lighter and pressed it in. Two nuts are inserted into the hex with a hammer or lighter, then capped on either side with a retainer part. BoM: 18-8 Stainless Steel Fully Threaded Rod, Meets DIN 975, M3-0.5 Thread Size, 1 m Length, Right Hand Threads for $12 (have plenty of rod leftover for next project!) 3mmx5mm 16mm Dia 20mm Length Motor Shaft Beam Coupler Coupling Connect for $6.84 Two M3 nut to insert into hugger Small amount of super glue... perhaps ABS slurry would work Four screw and nut to mount ... I used six-32 screws since I'm drowning in non-metric hardware The results are superb accuracy. The rod is very bendy and flexible, and that's totally fine. Slow down the Z motor and update the steps. According to Prusa calculator and forum, resulting steps 6400 and 3mm speed. GCode post-mod: M92 Z6400 # Update steps M203 Z3 # Slow down Z M500 # Save to EEPROM References: http://www.soliforum.com/topic/2154/fixing-banding-zwobble-with-fine-threaded-zrod/ http://prusaprinters.org/calculator/ http://www.metrication.com/engineering/threads.html (M3 pitch 0.5 for Prusa calculator above) Changelog: 2016-12-11 - My M3 nuts worked their way out, so I've added another part that will hold them in place. One is to be placed above and one below the part with the hex opening. Drill holes to size... I drilled mine slightly wider for six-32 screws. Print Settings Printer Brand: Solidoodle Printer: Solidoodle 2 - Pro Rafts: No Supports: No Resolution: 0.3mm Infill: 95% Notes: Hatchbox Gold 1.75mm PLA is what I used for this print.