This is a simple print for a 2 digit counter (0-99) that has an auto-increment mechanism. After turning the dial past 9, the second dial automatically goes up by one. I printed it out and it works without issue.

Print Settings:

Case Back, Case Front, 1s Gear, 10s Gear, Spring, Small Gear:

• Print with 0.2mm layer height, 0.3mm for first layer.
• PETG will give a more durable part.
• 2 Walls, 4 top/bottom layers.
• Infill doesn't really matter.

1s Dial, 10s Dial:

• Print with 0.2mm layer height, 0.3mm for first layer.
• Print first 2 layers (Up until text) in one color, the rest in different color.
• 2 Walls, 4 top/bottom layers.
• Infill doesn't really matter.

Assembly:

If you have questions, please refer to the Onshape link of the model: Model. All the parts are oriented the correct way in the model. If it still doesn't make sense, feel free to leave a comment.

1. Insert “Spring” into the 3 pegs sticking up at top of “Case Back”.
2. Attach “10s Gear” on left peg of “Case Back” (When the slot on the case is one the right side). Orient small dot on the gear to the right.
3. Attach “Small Gear” on the middle peg of “Case Back”. Orient where small dots are horizontal.
4. Attach “1s Gear” on right peg of “Case Back”. Orient small on the gear to the left.
5. Attach “1s Dial” to “1s Gear”. Align the small dot with the small dot on “1s Gear”.
6. Attach “10s Dial” to “10s Gear”. Align the small dot with the small dot on “10s Gear”.
7. Attach “Case Front” to “Case Back”.
8. Done.

I am also a solo game developer, so if you want to support me check out my itch.io page: [https://impy2eyes.itch.io/](https://impy2eyes.itch.io/)