Medium Pendulum Wall Clock
$12.00 Medium Pendulum Wall Clock
3D
Published 2020-11-19T17:01:30+00:00
SP3: This is a medium sized 3D printed pendulum wall clock that was designed to print on a Prusa mini or similar sized printer. The completed size is around 165mm by 400mm.
The escapement and gears are highly visible. Runtime is nearly 5 days with an accuracy of 1-2 minutes per week. It is designed to be a fully functional clock.
Total print time is just under 120 hours using around 1kg of filament. Print time can be reduced by using 0.2mm layer heights.
Videos of a similar (slightly larger) clock can be found at https://youtu.be/kn1OaGAae5w
The design has been highly optimized for 3D printing including the following enhancements:
1) The gear teeth use a unique profile designed to print very smooth running gears. This profile maintains an involute gear shape along the active surfaces with increased clearances to reduce interference. The original concept was defined as "fancy gears" for wooden clocks. This clock expands the principle even further for 3D printing.
2) The escapement has been optimized to provide very predictable performance. Traditional deadbeat escapements do not print all the way to the tip of the ponted teeth. The escapement in this design adds a wide active surface to print very uniformly on any printer. This escapement style may be unique to my clock designs.
3) The dial lettering was optimized to print perfectly using a standard 0.4mm nozzle. I go back and forth between CAD and the slicer many times to ensure clean print widths using a standard nozzle.
4) Gear ratios are optimized to utilize 12 tooth pinions for lower friction. This contributes to the long five day runtime.
A few non-printed parts are required to minimize friction and achieve a long runtime. They mainly consist of music wire for the arbors, bearings, common sized wood screws, fishing line, and filler for the weight shell. Most metal parts are well hidden so the clock appears to be completely 3D printed, yet the clock performs nearly as well as a traditional brass clock.
Go to https://www.stevesclocks.com/sp3 to download the latest assembly guide.
Use the forum at https://www.stevesclocks.com/forum to discuss clock making topics or assembly issues.
Parts kits are available at https://www.etsy.com/listing/1680193604 or you can source items locally (Amazon, eBay, Ace Hardware, etc.) if you prefer.
Assembly is very similar to the large version of the clock. They can be seen at
Part 1 - Subcomponent assembly https://youtu.be/NduVa_3wJFY
Part 2 - Final assembly and testing https://youtu.be/IOmcpzH5iek
Steve
15-Nov-21 Update: Added an optional front dial with simple numbers instead of Roman numerals. The numbered dial is called front_frame_lower_numbers.stl. It can be used instead of the Roman numeral front_frame_lower.stl.
02-Sep-23 Update: Added Rev 2 updates to create a solid connection between the pallet and pendulum. Adjustable height standoffs are also added. All new files have a "rev2" suffix in the file names. A complete description is in the rev2 addendum pdf. The files can also be found at https://www.myminifactory.com/object/3d-print-wall-clock-rev-2-updates-321782
The largest components will fit on a Prusa Mini or any printer with a 175x175x100mm print volume.
Tested using PLA with 0.15mm layer heights, 4 perimeters, 30% cubic infill, using an 0.4mm nozzle. Total print time is around 116 hours using just under 1kg of filament. Complete printing descriptions are included in the attached assembly manual.
| Date de publication | 19/11/2020 |
| Price | $12.00 |
| Durée d’impression | 116 - 117 minutes |
| Quantité de filament | 1kg |
| Dimensions | 175mm x 175mm x 100mm |
| Sans support | YES |
Great project, thank you so much!