Geek version flip calendar (STEP source file shared)
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Description
Recently, after seeing a flip calendar from an overseas master and a domestic replica, I found that the original designer only implemented basic functions, and there is still much room for optimization,
Coincidentally, there is a calendar competition now, so I reproduced the flip monthly calendar made by the masters, and also fixed some obvious problems and details that were not suitable for 3D printing.
I have also greatly simplified the entire structure, retaining only the most basic architecture to implement core functions, and provided all STEP files.
This means everyone can upgrade and reproduce it based on the masters' work according to their own ideas, creating their ideal flip calendar.
Original versions from the masters, click on the image to jump
 | I take back my praise for this person being a master, I apologize, I was naive.  
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Below, I will detail the issues fixed and improvements made after reproduction
 | Simplified all casings; Retained only the most critical support parts; Easy to print, no supports needed, considerable material saving; Convenient for everyone to realize their favorite casing extensions based on this framework. |
 | Added snap-in legs to facilitate overall structural enhancement and reserve space for carrying more gears and functions in the future. |
 | The original drive wheel locking relied on the back cover for locking, The overall plug-in structure led to breakage during the plug-in process due to differences in some 3D printers and materials.
The locking method uses a separate locking block, with a 20-degree chamfer for one-way insertion, simultaneously locking the axle below, and the outer side is sealed by inserting a knob, covering the entire locking block.
The back cover of the entire structure was removed. |
 | Reproduced the original day wheel, maintaining the same size and hole positions, the original design had significant friction at the edges, fine-tuned to reduce friction for smoother rotation. |
 | Reproduced the original month wheel, maintaining the same size and hole positions, the original design had significant friction at the edges, fine-tuned to reduce friction for smoother rotation. |
 | The original day wheel axis and month wheel axis were not designed with the 3D printing environment in mind, only considering functional implementation.
Reproduced with core dimensions unchanged, added insertion chamfers, and removed structural defects that required supports for printing. Better suited for 3D printing environments. |
 | The original design had the hexagonal shaft pressing directly against the shell's cutout, resulting in poor friction performance and unsmooth operation.  Added a sliding wheel between the shaft and the wall to improve the tactile feel when rotating the knob. |
Core issues yet to be resolved: already being addressed, will be released once confirmed problem-free.
The original design allowed the gears to be turned in both directions, a control structure needs to be added to achieve one-way rotation, providing a fundamental guarantee for adding more functions.
Finally, I wish everyone can create innovative works in this competition.^_^
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