Adusting Knob with Internally Integrated M3 Nut - Fits Bukito,Prusa, and Others.

thingiverse

This was originally designed as a replacement for the stock Bukito laser cut acrylic bed leveling knobs. Generally, it can be used generically for other projects which require and adjustable knob. This design integrates the nut internally so it doesn't fall out the bottom and gives more surface area which I find more comfortable and precise. This particular model uses an internal M3 nut. To embed the nut you must edit the G-Code and find an insertion point for you to pause the print. (See Instructions) If you are going to print this on a Bukito then 'I've provided the G-Code. The provided G-Code will print all 3 knobs with the proper pause already set. I've included the sketchup and DesignSpark files. Instructions Print this and place a pause in the G-Code so you can manually place the nut into the inside after it reaches the top level of the nut hole cavity. (See Photo) If you have a Bukito then you can use the provided G-Code file to print with the pause already built in. This can make it easier. It's set to print PLA at 0.2mm layer using Sli3er default settings for Bukito. If using a filament other than ProtoType then tweak the temperature and extrusion rate manually in the Machine Control Panel. If not then insert the following into your G-Code after the final retract of the key layer using your slicer of choice. G91 ; set relative positioning G1 Y150 ; move platform G1 Z20 ; move extruder up 10mm @sound @pause ADD NUTS TO PARTS G90 ; return to absolute positioning When placing the nuts inside, it's best to use a screw and place the nut with the nut partially screwed onto it so that it goes in quickly and straight. (see photo) A good suggestion is to have some extra M3 nuts and screws on hand.