Piaget 9P1 movement - Big Problem or not so big

[cduke]

Hello all

i just got a piaget watch that has a 9P1 movement and I still have a few days to return it if necessary. The problem is that the hands do not move under normal watch function. The balance wheel is moving fine and the pallet is working great and from what I can see the other wheels are rotating. The hands can be moved when the stem is pulled and rotated. My guess is a problem in the keyless works. Does this sound like a problem that can be fixed without too much trouble or would you return this watch? I don’t want to get into it until I know I will keep it.

thanks again

[Nucejoe]

Sounds like loose canon pinion, easy to tighten. So if you like the watch and prices is good, I'd keep it. 

 

[AshF]

Or the extended pivot is broken in the cannon pinion.

[watchweasol]

Hi  cannon pinion/hour wheel area loose/broken parts.  Its a dial and hands off job.

[nickelsilver]

Keep in mind this movement is in the "very thin" category, everything about it is delicate (the balance pivots are a hair under 0.06mm, no shock protection). You can see the size of the canon pinion in the photo, that's a 1mm screwdriver blade for comparison.

 

[VWatchie]

17 hours ago, Nucejoe said:

Sounds like loose canon pinion, easy to tighten.

Easy if you have the tool for it and a lot of experience. Even so, in this case, with such a minuscule cannon pinion, I'd be pretty nervous. I have Bergeon's cannon pinion tightener and the Seitz jewelling pushers and stake for lanterning cannon pinions but I doubt any of tools would work very well with this tiny thing. Perhaps you have some other technique or tool? Please share!

[jdm]

6 hours ago, nickelsilver said:

the balance pivots are a hair under 0.06mm

It's always difficult to catch you wrong Master ;-) According to wikipedia human can go from 0.017mm to 0.18m, maybe because that it has not made yet to official metrology.

[Nucejoe]

1 hour ago, jdm said:

It's always difficult to catch you wrong Master ;-) According to wikipedia human can go from 0.017mm to 0.18m, maybe because that it has not made yet to official metrology.

I showed off a tool I made out of a dull nail clipper in a post to a forum member, he came out with an improved version of the tool in no time. Two screws were mounted on it to set the upper and lower limits it is suppose to pinch the canon pinion which gave you full control over tightening.

Need tomorrow's sunlight to take pictures of my version and post, will search for picture of his version too.

[nickelsilver]

It's always difficult to catch you wrong Master ;-) According to wikipedia human can go from 0.017mm to 0.18m, maybe because that it has not made yet to official metrology.

Ha i realized when I wrote that hair was a poor comparison- but still haha.

Also, in case you want to work on tbis movement spare parts are nonexistent. The reason I have one on the bench is it needs a balance staff. It's only 1.6mm long so should be a piece of cake with so little metal to whittle off.

[Nucejoe]

Tightening the nut works a micrometer action, a 360 deg turn equals third of a mm. 

Tighten canon pinion apr .01 mm and try it on to see if more is needed. No insert is needed as you tighten.

Edited July 17, 2020 by Nucejoe
Dull the blade of the clipper with sand paper

[Nucejoe]

17 hours ago, VWatchie said:

Easy if you have the tool for it and a lot of experience. Even so, in this case, with such a minuscule cannon pinion, I'd be pretty nervous. I have Bergeon's cannon pinion tightener and the Seitz jewelling pushers and stake for lanterning cannon pinions but I doubt any of tools would work very well with this tiny thing. Perhaps you have some other technique or tool? Please share!

Do you tighten steps of small increments? and try it on the arbour each step.

Perhaps making a small nail clipper to a tool would suit small canon pinions, worth a try.

[cduke]

23 minutes ago, Nucejoe said:

Do you tighten steps of small increments? and try it on the arbour each step.

Perhaps making a small nail clipper to a tool would suit small canon pinions, worth a try.

Wow! Great stuff to read.  I think this is a job for someone with skills much higher than me.  I did look for other 9P1 movements online and they are out there, simply not very inexpensive as one could guess.

Thanks to all for a good read.