Watch Escapement Movement - Steel Spring

thingiverse

This is a modified version of LarkysPrints Watch Escapement Desk Toy. It replaces the 3D printed main spring with a steel recoil spring from a chainsaw. These parts are readily available as spares on Amazon or eBay, typically for less than $10 USD. The specific part used in this build is a Husqvarna 545008013 Starter Spring but others could easily be adapted. You can find the Husqvarna starter spring on Amazon at https://www.amazon.com/gp/product/B013TE9E5A. Let me start by saying if you're having trouble getting the movement to function using Karl's original design, this modification will not solve your running issues. You should debug or tune the original design before attempting this modification. Run time is approximately 20 minutes. You'll need the following additional hardware: M3 x 12: 10 M3 x 16: 1 Recoil Starter Spring: 1 ASSEMBLY Fashion a loop at the large end of the recoil spring using pliers that will tightly fit the large central pin on the Mainspring Support front. Remove from the support pin, which will be attached last. Place the smaller/inner eye end of the recoil spring into the winding stem and secure with the M3 x 16 screw. Mount the Mainspring Cage front to the Main Spring Support using two M3 12 screws. Begin at the top of the cage and start attaching the Cage Back to the Cage front section using M3 x 12 screws, working your way down from top to bottom. Ensure none of the mainspring is outside of the cage as you go. Attach the loop from the recoil spring to the Main Spring Support pin. Watch a tutorial on how to assemble the Watch Escapement Desk Toy at https://www.youtube.com/watch?v=qTUOEiZxwWY