"The phone is a remarkably complex, simple device, and very rarely ever needs repairs, once you fix them." - Dan/Panther
Started by RDub, October 28, 2016, 04:47:58 PM
Quote from: unbeldi on October 30, 2016, 10:10:03 AMok, I just tried the autocorrelation myself on the two files that you provided earlier.I come up with the impression that the first of files has a lot of jitter in it, and I think it will test mostly fast at around 12 to 12.5 pps, but does have some low frequency components between 7.9 and 8.3 pps.The second file (AE Dial 02) seems to perform more uniformly, but slow at 7.8 pps.What does your manual measurement determine? I have to admit that I am too lazy to do that myself.It may be that the first dial does not have a constant recoil speed, perhaps it is slowing down during the return rotation.AE Dial 01 Speed Audio File.wavAE Dial 02 Speed Audio File.wav
Quote from: dsk on October 30, 2016, 03:11:30 PMAs you see, the speed is a little slow 9.65 when I would like to have 10, by my opinion good enough.The same about brake length I would prefer 60-66, but got 66.58. No reason for adjustments. Should I sell it as adjusted, it would be a different case, It had to be within 60-66% and 10-12 PPS.dsk
Quote from: unbeldi on October 30, 2016, 08:55:56 PMBTW, if one uses this clipped signal, the correlation function cleans up amazingly, and provides a nice bell curve for reading the principle frequency.
Quote from: Contempra on October 30, 2016, 07:36:57 PMOkay but how to adjust the dial ? all i see is 2 screws !.. As i said , i've never adjusted a dial but all works ... but i'd like to know how to adjust a dial .. thanks
Quote from: TelePlay on January 02, 2017, 02:08:33 AM...The bottom image is a side by side spread sheet analysis of the pulse data, before on the left and after on the right. The dial picked up 1.3 PPS from 9 to 10.3 PPS, some of that increase due to cleaning and oiling and a bit due to the extra tension put into the spring.What's interesting is the standard deviation for break and make periods for each of 10 pulses before and after cleaning. While the average ratios before and after are acceptable and very similar (note - graph labels for the average break/make are reversed), the standard deviations improve from 1.441% to 0.619% for the measured "make" times and from 0.947% to 0.733% for the "make" times. That would indicate a more consistent break/make period over all 10 pulse periods.This was done the hard way, data read off of Audacity wave form and manually entered into an Excel spread sheet.Presented as further anecdotal evidence that dial ultrasonic cleaning works to clean without fill disassembly and Audacity with Excel is a good combination of software tools. While the "dirty" dial may have worked, the "cleaned" dial would produce better results when dialing.