Tips needed on updated large SP4B
Hi Steve,
I am bringing all of my parts together and struggling a bit with my 8-day configuration build.
Main problem: my pendulum swing time is short...about 3 or 4 minutes. I cleaned out the bearings and have ABEC-3's on order. I am going to clean then again. It is odd, because they feel fine. Btw, where do I get your swing gauge for this clock? I thought you had it as a download, but I can't find it.
I can run without the pawl. It takes somewhere between 5 and 8lbs to drive it , that weight measured running as a two end hung weight. That seems high to me, based on your notes, for the 8-minute configuration, but it does run. It is touchy at 5lbs but seems solid at 8.
When I bring the pawl into the mechanism, it just stops.
The one design detail that I am finding problematic is gear3. When I screw in the M3 into the gear, the shaft cocks, and the result is that the gear wobbles. It is flat to start. I reworked it a bit on Onshape to eliminate the internal increase in diameter, and also to add an opposing screw. But it still ends up a bit wobbly. I am wondering 1) how you worked around this, and 2) whether this is close enough to the escapement to cause an issue.
Great design! Great work on your part. If you have any tips, that would be great. Thanks, Dave
Hi Steve,
Woohoo, The clock is running with 5lb single ended. I will see how this goes for awhile. Then take it apart and see if I can get that drive weight down. I dressed it up with a german face that I found on line. Still working on the hands. Also I modified the pendulum to use 4mm carbon fiber rods, 17" long. Very inexpensive upgrade if it works out. My downstairs get cold in the winter, I have noticed issues with my SP8.
Thanks!
Dave