I have partly built the cuckoo clock but I am finding the pendulum is knocking on the left hand side tab that is used for docking the pendulum when not in use.
So I am getting a rather annoying knock every left hand swing rather than a gentle ticking sound.
Hoping this is not normal and there is a fix.
Welcome to community @Rod_B . You can ask @CustomerService to help you.
Welcome! @Wenbare just finished building this not too long ago so maybe she will know if this is normal or not. 
Welcome to the community, @Rod_B.
In my case, that doesn’t happen with the pendulum. No matter which side it swings to, it makes a gentle ticking sound 
.
Could it be that the pendulum is tilted to the left, or that something is preventing it from moving smoothly? Have you checked that the wire above isn’t touching the mechanism or anything like that?
If you could upload some photos showing the pendulum mechanism to see if there’s anything unusual, or a video of it working without the top part so the pendulum mechanism is visible, that would help a lot.
When I was building mine it never does a loud knocking noise. Mine is very gentle. Could it be the alignment? I hope @CustomerService or @Robotime will be able to help.
I can’t upload video. I have trimmed it to about 13MB but I get warning that I have exceeded the 100MB limit.
I don’t have a cloud service. Any suggestions to enable my video to be seen would be helpful.
I have included some photos of installation.
The model is perfectly level.
The second image shows where the pendulum hits the l.h stop.
Just to add, as the pendulum starts it swings cleanly but over a period of a few seconds the swing becomes wider and then collides with the l.h stop. Without power the pendulum swings evenly without issue. When powered it appears the pendulum becomes over excited by the electromechanical action.
Hopefully I can eventually upload a video.
I’m reluctant to proceed any further with this build until I can sort this out.
Sorry for the trouble this has caused you. We’ve already passed your issue on to our customer service team and they’ll help you look into it as soon as possible.
Welcome to the community, and thank you for sharing your experience with us. @Rod_B
OK, I have just uploaded video to Youtube.
You may have to increase audio level to hear the knocking of pendulum
Also note that the it is camera shake that is making the cuckoo clock appear a bit wobbly.
I have have trimmed over half of that peice off and knocking returned but took a bit longer to start.
If I remove all of that peice I wont be able to disable or dock the pendulum and no guarantee that this will fix problem.
I decided to remove that peice completely.
Now the pendulum can fully sweep to the l.h side without hitting.
But now it sweeps too far to the right and is now hitting r.h stop.
It looks to me that there is too much energy from the electromagnetic action between the pendulum magnet and the energised coil in the clock.
As I have mentioned the pendulum works perfectly when not powered, but of course it eventually stops.
I have found a solution to my problem.
I carefully removed the magnet and it’s plastic cover and reversed the assembly as shown in attached image. All parts secured by epoxy glue. Now the magnet is further away from the clock body thus less energy is transfered to magnet. Just enough to keep pendulum swinging.
Now the arc of the pendulum is reduced and doesn’t hit the side stops anymore. Not a perfect solution but now I have a quiet although partially finished cuckoo clock.
Hello there,
This solution does work, but the root cause still lies with the components themselves. We have already reported this issue to the design department, and corresponding optimizations for these components are in progress.
Hi, in my build i needed a new battery box and clock as the clock wouldnt work. Rokr was good and sent the parts which arrived yesterday. I went back to building and I also found that the pendulum arm was swinging way to far each direction. It would seem to gain momentum and hit both the right and left stops making obvious noise. I followed this thread and clipped out the stops. This however allowed the arm to swing to the point of hitting the right wall (if looking from the front). I adjusted the clock position which it had a bit of give to rotate it ccw despite being screwed in which allowed the arm to not hit the wall and the noise was greatly quited. The remaining noise seems to be from the axis of the arm which has stops in the circular axis. In looking at it closely I will end up putting a thin bumper up at the axis of the arm so that it will slow the motion. My initial attempt is just a tiny folded piece of paper on one side of the axis. This immediately slowed the motion and shortened the travel of the arm. The remaining noise from the axis was eliminated. Seems like the clock piece gains too much momentum.
That was what I experienced. My solution was as shown in the image above.
Now my pendulum swings gently within it’s correct arc.
It was quite difficult to remove the pendulum magnet as is it glued into the recess at the base of pendulum. I had to do this with the clock mounted inside. But much easier to refit.
It does seem more of a electromechanical issue rather than just a mechanical issue.
Anyway my completed clock is now working perfectly and silently.
I have noticed now after many months, the dendulum or thế clock is making a loud clicking sound every 3 seconds and it wasn’t doing that before.
Open the battery box and have look how far the pendulum is swinging.
It should be swinging clearly between the stops without hitting.
If it is hitting one of the stops then you may have a similar problem to what I had.
However, as reported by Jeff_Podraza and my self the pendulum was swinging far too much from the start.
In my case the pendulum is now swinging within the limits after my mod.
I am impressed that you were able to find a solution. I like to tinker and make things work also.
Thanks for your kind words.
Although retired now, I was an electronic technician involved in diagnosing and repairing electronic equipment.
Model building is now a nice way to keep my left and right brain active. Although frustrating at first, solving unexpected problems in this area is quite satisfying in the end.
I only clipped off one of the stops.
I suspected that the pendulum would hit the walls if the other stop was removed. You have confirmed what I suspected.
I believe the stops are there to prevent the pendulum swinging wildly during transport or when moving the clock and shouldn’t come in contact with pendulum while in normal use.
