Adjustable monocular microscope clamp/bracket

Designed to fit one of the many monocular lens assemblies available from Asia with digital cameras on top. Used in conjunction with a pretty standard Volcano monitor stand to provide the reticulating arm to clamp this assembly onto. You can probably use any other similar monitor arm. Files provided in STEP format as well so if you need to make changes it should be easier.

There are 2 models with different carriers. One grips the lens on the narrower 39mm part(non standard), and one that grips the lens lower down on the more standard 50mm section of the lens.

A single model is supplied which you will need to split into parts after importing it into the slicer. In Bambu slicer you can right click on the part -> split -> to objects. Don't forget to duplicate the knob in the slicer, you will need 2 of them :)

I have only tested the 39mm carrier as I only realised afterwards that the 50mm segment is standard and that it would be hard to alter, even with the STEP file, without changing the base sketch in fusion.

Print Settings

Printer: Bambu Lab X1C.
Material: Bambu Lab ABS (my preference for durability).
Print Nozzle: 0.4mm.
Support: Tree, 15° Threshold, On build plate only.
Wall loops: 8 (20 for the spur gear).
Ironing: Top Surfaces, Concentric
Print the spur gear in the upright position with no infill.
Use a random seam on the knobs or the seam on the journal will form a high spot (it can be filed and sanded out if you don't).

Material requirements

6 x M3 Brass inserts.
5 x M3x8mm pan or dome head screws (I prefer dome with a hex key head)
1 x M3x10mm pan or dome head screws (you may get away with a 8mm)
2 x 8mm fender washers (depends on stand)
1 x M8 bolt (depends on stand)

Finishing Notes

There is minimal support material but removal can be tricky especially between the knob tightening flanges.
Run an 8mm drill through mount hole in bracket for the stand as it will not take an M8 bolt as is.
Used 400 grit sandpaper sheet on a flat surface to smooth and bring the angled sides of the post with integrated rack into dimension.
Same sandpaper wound twice around a AA battery to clean up the adjusting knob bore.
Same sandpaper to very lightly smooth the knob journals.
Check for smooth operation of the knobs independently and tighten the journal flanges until they lightly grip the knobs before inserting the spur gear.
On my print the knobs formed a pretty good interference fit with the pinion gear and did not require any adhesive.
Was planning to use adhesive to join the the rail to the bracket but the press fit with the 3 screws was enough for me.