MDK 0 Posted June 29, 2016 I got hold of a eta 2842 for my low AP diver beat project, after servicing the movement it is behaving quite erratically, the beat error is all over the place as is the amplitude. It has been demagnetised, the hair Spring is not binding or tangled, if you look at the image below you can see the max, min and average values, it's all over the place I did nothing different when servicing this movement as I did with a Swiss 2824-2 ( in my diver right now) and this looks pretty good, now I know a timegrapher app is never going to be perfect but it's a reasonable indicator Any advice, I assume a bent pivot or damaged Jewel somewhere, parts for this movement are pretty thin on the ground as well Share this post Link to post Share on other sites
GenTLe 1,501 Posted June 29, 2016 Uh... Did you test it before the service? If it was more or less working normally (with just signs of clean needed) it may be just some stupid micro pube. I had similar stuff once: did again a full unassembly and clean and it was ok. I am assuming the movement is still uncased and with no hands and dial. Share this post Link to post Share on other sites
TickleShoes 0 Posted June 29, 2016 Had the same thing once. If it's not magnetism or the spring I'd start with the escapement. Check/clean the pallet fork jewels and balance jewels. I've gotten overzealous with oil and caused more problems than help. Cleaning out fixed it. You sure you got everything seated in the jewels in the first place Share this post Link to post Share on other sites
TRANSPORTER 1 Posted June 29, 2016 Yep id be stripping it down again and re cleaning etc etc, again have a real good look at the escapement, in fact every single piece will now need looking at under the loup to make sure it's spotless then try again mate. Share this post Link to post Share on other sites
MDK 0 Posted June 29, 2016 Uh... Did you test it before the service? If it was more or less working normally (with just signs of clean needed) it may be just some stupid micro pube.I had similar stuff once: did again a full unassembly and clean and it was ok. I am assuming the movement is still uncased and with no hands and dial. Yeah I tested it, it was just running fast, around 120 seconds, strip clean, rebuild, oil and demagnetise, will check for pubes Share this post Link to post Share on other sites
