This mechanism converts rotary motion to reciprocating rotary movement.
First seen as a case in SimLab Composer Mechanical.
Produced in Moment of Inspiration (Moi), simulated in SimLab Composer Mechanical and printed in Diamond Age PLA on an Ultimaker original.
A movie of the finished print in action is here: https://youtu.be/b5-83VKwb5w
To get a view without my hand in how a simulation is here: https://youtu.be/zkBwzYbl3Sw
And an interactive 3D pdf file is included with the stl files.
Produced in (Diamond Age) PLA.
For Engineering programs I normally use wall sections of 1.2mm (using a 0.4mm nozzle).
By default I use a brim which helps to keep the larger articles flat.
NOTE. I have NOT. Most are not and need checking for positioning and orientation before printing although some may be correctly oriented with chance.
I wash the edges of screw holes using a tapered reamer, and bring to size the holes in which a shaft rotates with a hand (parallel) reamer.
NOTE that the hole in the handle to accept the stem shouldn't be reamed to size as the stem is a mild tap fit into the handle.
One thing to watch out for in assembly is that the connector should be screwed to the gear 12 before the gear 77 is fixed to the connector.
I've used 3mm x 10mm long button head cap screws throughout.
If I've counted correctly, I used, 21 and there is provision for a further two.