When debugging the electro magnetic clock I tried a lot of different combinations of the 2 pawls but when the second hand was between the 2 and 4 I would always get double clicks. I finally solved this by balancing the second hand. I glued small washers one at a time on the back side of the second hand counter balance until it was perfectly balanced. I ended up using 3 small washers and now the clock has been keeping very good time for 2 weeks now.
Having a problem keeping the clock running. I have taken it apart twice and all appears to be well. It will run with an even tick from just a few minutes up to 2 hours or so. Appears to run well and all gears turn as expected without the escapement as the weight slowly drops. The clock doesn't stop abruptly, but gradually loses amplitude and slowly stops.
Currently I have 8.75 lb of BBs in the weight shell. I'm not sure what else to try. I've looked at and tried the debug hints, but nothing seems to help. When the clock does run, it seems to run well. My only thought at this time is to add an extension on the shell and add more weight, say maybe 10 lb?
I'd appreciate any thoughts and help. Thanks!
I had a similar situation with a clock I made. In the end I fixed it by polishing the ends of the piano wire shafts, reaming the plastic housings a few .001 over the true diameter and applying light machine oil to each spot in the frame where the shafts turn.
Also make sure you have clearance end to end. Should be about 1/8” of space. The plastic gears aren’t metal and aren’t perfectly round and aligned. There needs to be clearance all around to account for movement.
Finally, just let it run a while and I bet it sorts itself out. After making those changes of course.
I am interested in SP11, and am wondering if you sell a parts kits for this model? I purchased the kits for my other two wall clocks.
I actually found this for $48 dollars... does it include everything I need to build the clock? Board and parts? https://www.etsy.com/listing/1464560995/silent-shield-clock-controller?variation0=3431579134
Thanks! Steve
Yes. The electronics and hardware parts kits are available at Silent Shield Clock Controller - Etsy
SP13 clock, the gears are all running well - been ticking away for 4 days now.
The problem is that the hands aren't moving - and I believe that gear 4a is not driving gear 4b through the friction spring.
I have checked 4b is locked properly to the arbour with the M3 screw, so it seems it is 4a freely rotating and not driving the arbour (and 4b) through the spring.
Any tips for debugging this specific issue? Thanks!
Quick question for the group - my clock is running perfectly on 2.7kg (~6lbs) main weight, but I am sure it will run on a lot less. Is there an advantage one way or the other to using more or less weight? Pendulum is currently plus/minus 14 degrees of arc.
I designed my own weight shell to suit a large lead ingot I had in, so it's a bit of a mission to cut sections off the ingot to try it (would be easier with lead shot obviously).
Sorry for the late reply. I stopped getting emails for new entries.
You are correct that the second hand needs to be properly weighted. The design should have a counter-weight built into the second hand that is taller and wider. It only works if the second hand is printed with 14-15 perimeters or 100% infill. Other mechanical options using washers will also work.