LomoGraflok 底片容器（适用于Speed & Crown Graphic系列相机）

LomoGraflok Ground Glass holder for Speed & Crown Graphic (21.3mm thickness)

2024-01-08 03:44:19

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LomoGraflok 底片容器（适用于Speed & Crown Graphic系列相机）

Summary

I really liked the integrated GG holder Darkosman developed for the speed graphic, but there were a few problems I wanted to solve:

1) Simplicity: there's a lot of features that look very good but make editing the mesh and printing it more difficult.

2) Thickness: The shim is about 19.4mm thick, which is the older standard for lomograflok shims. As it was found the actual focal plane is a little further back the current production shim is closer to 21.3mm, going by the shim my current production back included.

3) Arm retention: the spring arms have a bit of side-to-side slop and I wanted to remove the odds of an arm sliding off the end of a post and dumping my GG onto the ground.

So, the model was simplified, which then made adjusting the total height of the shim to 21.3mm much easier. The graflok mounting slots were simplified as well.
A whole new set of mirror lugs were designed based off the original dimensions, but with a squared-off set of wings to prevent the arms sliding off.

A mild 1mm radius was added to make it easier to avoid pointy corners

Print Settings

Printer brand:
Creality
Printer:
Ender-3 v2
Rafts:
Yes
Supports:
Yes
Resolution:
0.26
Infill:
50%
Filament brand:
SUNLU
Filament color:
Black
Filament material:
PETG
Notes:
I found that a cheap jeweler's screwdriver and a small hammer was the easiest way to chase all of the support material out of the locking slot.