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Old 4 February 2010, 04:46 AM   #1
TheBluePrince
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Regulating 1520 help please

Hey folks,

The 1520 in my 5500 Explorer is running about 15-20 sec slow a day. This is regular and consistant. It's fine in every other way and looks like new so simple regulation rather than a service is the way to go i think.

I would not attempt to regulate any of the free-sprung balance movements with the microstella but as this is not then i would like to have a go.

Does anyone have any links to a guide for regulating the 1520? Or can give advice based on experience?

Many thanks
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Old 4 February 2010, 05:54 AM   #2
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I think that one must first look at why it may be running slow...even if it is consistent as running slow is a symptom sometimes, and not a condition..

If it's been a few years since a service, or the watch is used in a harsh environment, then lack of oil (or build-up of grit) at the pivots, worn pallet jewels, or lack of grease under where the lever pallet slides all lead to a watch that is working harder and beginning to slow down; just regulating is not the right fix..

If the watch has seen a regular service over it's life, and it has been knocked recently, or it's always been off by a similar amount, then a regulation may be all it needs...

Now... if you just want to play; I'm all for that too.............
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Old 4 February 2010, 06:54 AM   #3
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I understand that service may be due. I'd like to have a go at regulating first though. If unsuccessful then it will be off to my watchmaker for a service for sure. I'm not going to be overly anal about it and want it running +/-2 sec a day. It's the running slow that i don't like. If I could get it anything upto say 10-15 sec a day fast then i'd be cool with that.

So..........i think i'd like to play

This is what the balance looks like right now...

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Old 4 February 2010, 01:21 PM   #4
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Move the regulator away from where the hairspring is studded or looking at this picture the bar on the right away from the other bar about a 1/10 of a millimeter to start. Then set to a known good time source and wear for a day or two. Without a timing machine it's a guessing game and may take a week or so to get it where you want it. Rik
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Old 4 February 2010, 01:58 PM   #5
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See Rikkis warning on the setscrew a couple of posts below...........
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Last edited by Tools; 7 February 2010 at 12:23 PM.. Reason: corrected misinformation
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Old 5 February 2010, 12:32 AM   #6
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Ok, thanks guys. I've just moved the right hand post a fraction of a mm and set the watch to an atomic source. Will check it again this time tomorrow......
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Old 6 February 2010, 03:41 AM   #7
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-6 sec over 24 hours now. Have nudged it a fraction more....now watch it jump to +10 or something
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Old 6 February 2010, 04:52 AM   #8
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Old 7 February 2010, 11:57 AM   #9
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The screw is for the hairspring stud do not loosen or it will fall out .The regulator on this model has no lock stop mechanism. Rikki
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Old 9 February 2010, 03:24 AM   #10
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Thanks for the help guys. Success. Now running +/-1 second per 24 hours. It gains 1-2 while on my wrist and then drops them off again while sitting crown up overnight. Very pleased.
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Old 9 February 2010, 04:27 AM   #11
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Quote:
Originally Posted by TheBluePrince View Post
Thanks for the help guys. Success. Now running +/-1 second per 24 hours. It gains 1-2 while on my wrist and then drops them off again while sitting crown up overnight. Very pleased.
And all that fantastic accuracy without the aid of a parachrome hairspring just love those 15XX series movements.
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Old 9 February 2010, 03:46 AM   #12
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Glad to hear it Rikki
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