2-digit 7 Segment Mechanical Counter Display

Counts up or down, and each digit is controlled individually. Use it as a scoreboard, Christmas/holiday countdown, habit tracker, and more! Includes print profiles for all Bambu Lab models, including the A1 mini.

This is a remix of the original creator's 2-digit model. It includes a new tab on the mid plate to prevent the rubber band from sliding and gumming up the mechanism.

From the original description:

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.

New for v3.0:

• Forward & Reverse Counting (by swapping springs/drums instillation in the mid-plate)
• 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

(2) - SEG_PLATE_v3.0

(2) - MID_PLATE_v3.1

(2) - BACK_PLATE_v3.0

(8) - SCREW_v3.0

(4) - SEG A_v3.0

(4) - SEG B_v3.0

(4) - SEG C_v3.0

(2) - SEG D_v3.0

(2) - CAM A1_v3.0

(2) - CAM A2_v3.0

(2) - CAM B1_v3.0

(2) - CAM B2_v3.0

(2) - CAM C1 _v3.0

(2) - CAM C2_v3.0

(2) - CAM D1_v3.0

(2) - CAM D2_v3.0

(2) - TIMING_GEAR_No1_v3.0

(2) - TIMING_GEAR_No2_v3.0

(2) - SPRING_v3.0

(2) - SPRING_R_v3.0

(2) - SPRING_DRUM_v3.0

(2) - SPRING_DRUM_R_v3.0

(2) - PUSH_ACTION_v3.1

(2) - PUSH_BUTTON_v3.0

Non-3D Printed Components:

(1) - Rubber band (recommended 2mm x 60mm, Size 16) - for D-segment

(1) - Rubber band (recommended 2mm x 100mm, Size 19) - for A, B, & C segments
(1) - Rubber band (recommended 3mm x 60mm, 2x Size 16)

General Settings:

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

Based on a 0.4mm nozzle