Moon dial not moving
Not sure how to resolve this but the moon phase gear isn't turning. The clock runs and reliably. Any suggestions?
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Escapment not moving.
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Steve
Feb 02
There are lots of places to check for friction.
Start by checking that every gear has some end shake within the frame. The escapement also needs some end shake between gear 2 and the stop collar.
Then check that every gear spins freely on its arbor. All arbors should also rotate within the frame. This is especially true for the escapement arbor since gear 2 is rigidly connected to the arbor.
Finally, start testing pairs of gears rotating inside the frame. Keep adding extra gears and checking again. The resistance changes every time another gear is added, but should not change dramatically.
Steve
Clock runs for a few hours and stops..
Weight shell hanging.
Hi Folks, I just want to validate I did not mess up something simple on the SB14. My clock runs for a few hours and stops. I am going to take it down and check the fit in the frame of all the arbors I suspect some might be too tight.
For the few hours it runs it is pretty accurate and everything seems ok. Last night it ran for 10 hours. When it stops just moving the pendulim is not enough the escapement wheel seems to not be in the right position and the escapement just goes back and forth so I need to turn it just a little so it can start turning and then it goes again.
I just want to make sure I am not missing anything hanging the weight, the string is going from the spool through the pulley and hooked to…
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Steve
Jan 16
Just to clarify, are you saying that the escapement doesn't rotate when you manually move the pendulum back and forth?
This would tell you to look for friction in the gear train.
Start by looking for physical defects like blobs or elephant foot, focusing directly where the gears are meshing when the clock stops.
Look from the sides to see if any sideways interference is occurring.
Move each gear in and out to check for end shake. Also notice if the escapement starts spinning again as you touch each gear.
Check that the cord is not binding on itself.
The next steps involve taking the clock apart to double check that every gear spins freely on the arbor and within the frame. These steps are outlined in the assembly guide.
You can try greasing the pinion teeth to see if things improve. Very little grease is needed. It will work into the main gear teeth.
Remove the pallet and let the gears spin until the weight hits the floor. Sometimes this loosens things up.
Having issues
The attached vid explains much of my dilemma. To add, I printed in PLA on a Flashforge AD5X following Steve's print details and guidelines. I welcome any advice. Please be kind. I'm new to this. Thanks!
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Bob Schueler
Jan 10
Update - After my previous message and sanding the gears, I activated the pendulum and left to run some errands. I came home about 4 hours later and the pendulum is STILL swinging with consistent amplitude!! I went ahead and added dry lube to the escapement and pallet gears which seems to have quieted the movement a little.
Question - There's little bit of bounce on the pallet gear as it's meshing with the escapement - probably 40% of the time. It's been like this from the beginning. Is this a problem? It doesn't seem to be impacting the amplitude - or at least it's not doing that now. If you need video, let me know.
Now it's onto adjusting (if need be) for correct time.
Hoping for winner here and even if I'm not there yet, I'm really close. Thanks for your help!
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The moon phase operation is only two gears and a friction clutch. Make sure that both gears can move freely. Touch the gears and they should move slightly. Test the friction clutch by manually rotating the moon dial by reaching behind the main dial. There should be a small amount of resistance.
Another possibility is that you need to wait longer to see the moon phase rotate. The moon dial makes one complete rotation every 59 days. This gives a full moon cycle of 29.5 days.