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Modelo 3D Mechanical 7-segment digital clock por shiura no Printables

Descrição

Mechanical 7-segment digital clock with 23 segments, controlled by only one RC servo motor. Not only all segments but also carries between digits are mechanically resolved.

  • display size (size of the front panel) : 23cm x 10cm
  • digit size : 8 x 4cm (the area of center line of each digit)

It consists of 54 types, 115 parts printable with common 3D printers. You also need

  • 1 RC servo motor (normal, full size servo. I used Sanwa SRM-102Z)
  • 1 micro:bit and 5V power supply (break-out board, etc.)
  • 7 rubber bands
  • 19 M3 bolts
  • paint (ex. white paint for black 3D printer material)

Necessary tools

  • sand paper or file for deburring
  • soldering iron for welding plastic
  • M3 Screw tap (if you do not use tapping screw)
  • Silicone grease or spray for lubrication

Tips

  • all parts can be printed out without supports.
  • for smooth operation, deburring and lubrication is very important.
  • A few cases of breaking rothook.stl (ratchet hook) during the daily use are reported. To solve this problem, print the rothook.stl with a bit larger scale (ex. 103%). It will also solve the problem of very heavy load and loud noise of ratchet.

Update 2020/12/6

  • Single digit unit is released. It is easier to make and good for a trial. The video of that one includes a guide of assembly, so please check it out.

[https://www.thingiverse.com/thing:4676614](https://www.thingiverse.com/thing:4676614)

Update 2021/10/31

  • Improved single digit unit is released. Number of the parts is much reduced. It does not use rubber bands and requires very small force to drive.

[https://www.thingiverse.com/thing:5066794](https://www.thingiverse.com/thing:5066794)

Note

This 7-segment cam mechanism is invented by Peter Lehnér, [https://t.co/R4ZO4ZHFVy](https://t.co/R4ZO4ZHFVy) [https://www.thingiverse.com/thing:3351710](https://www.thingiverse.com/thing:3351710)

Custom Section

Assembly guide ==============

I recommend plastic welding using soldering iron, because it is fast and secure. It is also possible to disassemble by melting the weld part.

Category: Gadgets

Printables

Mechanical 7-segment digital clock

shiura shiura (abre em nova aba)

Publicado em 15 de abr de 2022

71
Curtidas
207
Downloads
Categoria Other Gadgets
Tags
thingiverse
Licença Creative Commons — Attribution — Noncommercial — Share Alike
Arquivos (60)
slideseg7.blend 9.7 MB
slideseg7.blend 9.7 MB
base-hour.stl 160.6 KB
fixkbolt.stl 254.6 KB
seg-msb-2.stl 2.8 KB
cam6-tl.stl 174.8 KB
fixknob.stl 422.7 KB
follower-a-6.stl 3.4 KB
seg-21.stl 3.2 KB
cam12-tr.stl 72.1 KB
geneva-a.stl 139.5 KB
axis40mm.stl 684 B
rothook.stl 26 KB
follower-b-6.stl 4.2 KB
base-2.stl 151.9 KB
cam6-c.stl 173.3 KB
cam6-br.stl 174.6 KB
cam10-c.stl 64.2 KB
geneva-d.stl 47.7 KB
cam12-bl.stl 72.1 KB
geneva-b.stl 40.8 KB
cam10and6-spacer-2.stl 25.2 KB
axis-minigear.stl 684 B
cam10-bl.stl 64.2 KB
geneva-c.stl 139.5 KB
cam10-bc.stl 64.2 KB
cam12-tl.stl 72.1 KB
cam10-tc.stl 64.2 KB
bottom-3.stl 142.5 KB
follower-c-6.stl 4.2 KB
follower-msb.stl 8.9 KB
cam6-tc.stl 176.1 KB
gear-6.stl 354 KB
facepanel.stl 678.9 KB
cam6-tr.stl 173.9 KB
baseplate.stl 211.8 KB
axis60mm.stl 684 B
follower-d-3.stl 4.2 KB
cam12-br.stl 72.1 KB
cam12-msb-frange.stl 37.7 KB
oneway-gear.stl 28.2 KB
axis27mm-4.stl 684 B
cam10-tl.stl 64.2 KB
cam12-msb.stl 84.6 KB
bearing-12.stl 24.5 KB
cam6-bl.stl 177.5 KB
cam10-br.stl 64.2 KB
cam10-tr.stl 64.2 KB
servoholder.stl 30.3 KB
gear-mini.stl 177.8 KB
cam12-c.stl 72.1 KB
minigear-holder.stl 35.2 KB
cam12-bc.stl 72.1 KB
cam12-tc.stl 72.1 KB
onewayhook.stl 60.8 KB
cam6-bc.stl 176.1 KB
cover-hour.stl 232.8 KB
microbit-mount.stl 37.4 KB
cover-2.stl 222.8 KB
microbit-spacer.stl 38.4 KB
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