Printing and Assembly of the Useless Machine / Mistery Box

Step 1

Printing of all the parts of this device is pretty strightforward.

The provided STL files already position the part in the recomended printing position.

Only one of the parts (Top,stl) needs aditional support. I reccomend using only a support enforcer for the back part of the part, and print the hinge holes with no support.

Only one of the parts (Finger.stl) needed a raft to be printed.

I have printed the model in PETG and in PLA with equal results.

Mechanically, the most solicited parts are the lever ones (MecLever.stl, LeverFixed.stl, LeverFloat,stl). I reccomend printing them with extra perimeters and a nice infill.

The model has been carefully designed to make it an easy print . Tolerances have been worked out to produce an easy to assemble functioning USELESS MACHINE on all printers. Nonetheless, STEP files are included in case you want to squeeze more the gaps (for your extremely accurate resin printer) or perhaps you want to redesign the cover with your own embossment, or maybe change the motor mount to assemble the device with a different motor.

TOLERANCE ADJUSTMENT

If, after performing the assembly you think that the device has too much play, and things could be tighter, you only need to tweak the design of one part (MecHinge x3.stl). Just enlarge the diameter of the hinge a couple of tenths of a milimetrer and try again. The part prints in ten minutes, so although you need three of them, repeating the print is no big hassle

TWO COLOUR PRINTING

The cover can be printed with a normal 3D printer and also with a dual extruder printer if you want to get the fancy two colour effect.

Step 2

In progress

Step 3