Version 3.0 of the 7-Segment mechanical counter. Improved design. This particular model is a sequential counter (numbers 0 - 9) that receives a linear input to cycle the display. This version was designed and prototyped using the Bambu Lab X1 Carbon.

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See video here:

New for v3.0:

Swapping the springs & drums will change the direction of counting (see details in video).
Cams A, B, & C now include guide discs to keep seg followers aligned
Segments & followers are now a single printed part (no glue required!)
Shape of D-Cam shafts improved to avoid printer corner bulging
Increased depth of numerous components to improve rigidity & surface contact area among interacting parts
Improved tolerances
Replaced push-action rubber band with coil springs
Lengthened pegs on push-action that engage the spring drums
Dedicated rubber band for D-segment
Pegs added to seg-plate to allow for equal distribution of force from rubber band

Quantities of each 3D printed component for a complete assembly:

(1) - BODY_v3.0

(1) - SEG_PLATE_v3.0

(1) - MID_PLATE_v3.0

(1) - BACK_PLATE_v3.0

(4) - SCREW_v3.0

(2) - SEG A_v3.0

(2) - SEG B_v3.0

(2) - SEG C_v3.0

(1) - SEG D_v3.0

(1) - CAM A1_v3.0

(1) - CAM A2_v3.0

(1) - CAM B1_v3.0

(1) - CAM B2_v3.0

(1) - CAM C1 _v3.0

(1) - CAM C2_v3.0

(1) - CAM D1_v3.0

(1) - CAM D2_v3.0

(1) - TIMING_GEAR_No1_v3.0

(1) - TIMING_GEAR_No2_v3.0

(1) - SPRING_v3.0 - OR - SPRING_v3.1 (added 5/12/25, stiffer inner spring increases tactility. Add lube between inner spring & mid-plate cogs)

(1) - SPRING_R_v3.0 - OR - SPRING_R_v3.1 (added 5/12/25, stiffer inner spring increases tactility. Add lube between inner spring & mid-plate cogs)

(1) - SPRING_DRUM_v3.0

(1) - SPRING_DRUM_R_v3.0

(1) - PUSH_ACTION_v3.1 (Updated 8/3/24, two options: coil springs (recommended) or rubber band)

(1) - PUSH_BUTTON_v3.0

Non-3D Printed Components:

(1) - Rubber band (recommended 2mm x 60mm) - for D-segment

(1) - Rubber band (recommended 2mm x 100mm) - for A, B, & C segments

Push-Action Option A: (recommended)
(2) - Coil Springs (4mm x 50 mm)

Push-Action Option B:
(1) - Rubber band (recommended 3mm x 60mm)

Printer Settings/Profile:

Bambu Studio Profile:

0.20mm Standard @BBL X1C

General Settings:

Material: PLA
Layer Height: 0.2mm
Infill: 100%
Supports: No

Based on a 0.4mm nozzle

Alternate Options:

2-digit body: https://www.printables.com/model/972295-7-segment-2-digit-mechanical-counter-body-version

7 Segment Counter, v3.1, Single-Digit

by Flower-3D · original on Printables ↗

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Print profiles

BODY_v3.0.stl
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BACK_PLATE_v3.0.stl
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CAM_B1_v3.0.stl
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CAM_D2_v3.0.stl
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CAM_A1_v3.0.stl
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CAM_B2_v3.0.stl
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CAM_C1_v3.0.stl
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CAM_A2_v3.0.stl
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CAM_D1_v3.0.stl
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CAM_C2_v3.0.stl
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SEG_D_v3.0.stl
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SEG_B_v3.0.stl
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SPRING_DRUM_v3.0.stl
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SEG_C_v3.0.stl
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SEG_A_v3.0.stl
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TIMING_GEAR_No1_v3.0.stl
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PUSH_BUTTON_v3.0.stl
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SPRING_R_v3.0.stl
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SPRING_DRUM_R_v3.0.stl
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MID_PLATE_v3.0.stl
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SPRING_v3.0.stl
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TIMING_GEAR_No2_v3.0.stl
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SEG_PLATE_v3.0.stl
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SCREW_v3.0.stl
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PUSH_ACTION_v3.1.stl
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ALL_PARTS_v3.1.3mfDEFAULT
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SPRING_v3.1.stl
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SPRING_R_v3.1.stl
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