Timex model 63 amplitude adjustment

[Oriskany]

I have a working Timex model 63 and the timekeeping is ok but I messed with it when I bought it in the early 80s and consequently the amplitude of the balance changes. This model has a hairspring amplitude adjustment arm - rather like a mechanical watch hairspring regulator. My question is, is there an adjustment procedure for this to make the balance vibrate with a consistent amplitude? Thanks

[JohnR725]

19 minutes ago, Oriskany said:

consequently the amplitude of the balance changes

What are you using to measure the amplitude?

As it's an electrical adjustment we probably need a service manual which conveniently looking online I didn't find it. But somebody in the group because I know there are people at work on Timex watches probably has one and they will come along shortly.

 

Then for those of us who didn't instantaneously grasp what watch this is here's a link Or three

http://www.crazywatches.pl/timex-63-electric-quartz-1973

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Timex_M63

https://electric-watches.co.uk/makers/timex/

 

[Melt]

The regulator arm will only speed up or slow the watch. It should have minimal effect on amplitude. 

The trimmer on the circuit board may have some effect on the current getting to the coil and may increase or decrease impulse power to the balance. 

If all else fails you can bypass the circuit board and put a of piece wire between the two post that held the CB and see if this improves things.

 

[HectorLooi]

The M63 is a strange one. According to the service manual, the regulator arm actually adjusts the amplitude. Timing is adjusted by the trimmer on the pcb. 

Bypassing the circuit board would make the balance swing but then, it wouldn't be controlled by the quartz circuitry. 

From my limited experience with this watch, the culprit is the trimmer capacitor. It is not soldered on but is only glued on with epoxy. Over time the bond becomes weak and the amplitude becomes erratic. 

On my Timex, the trimmer capacitor fell off completely. But when I soldered it back, it works beautifully. Check out my earlier post below.