ETA 7750 - Lagging Engagement

[mzinski]

Hi, 

Ive been working on a fairly low quality 7750 recently. The watch and movement were a right mess but after cleaning them thoroughly, only a few components needed to be replaced. 
However, one issue is dogging me, the minute hand does not engage for 60 seconds after I set the time (moving clockwise). If I set the time counterclockwise it engages immediately. 
My first thought was the driving pinion. I tried recleaning, relubricating, and inspecting for issues. Nothing seemed awry. But to test my theory, I replaced it. The issue has continued. 
Given the driving pinion appears to move the minute hand, and that comes direct from the drive train, can anyone suggest what I might inspect/test next? 
Could it be the there is enough slop between the driving pinion, intermediate wheel, and minute cannon that it takes 60 seconds to catch? 
The movement runs during that 60 seconds and the seconds wheels moves as it should the whole time. 
TIA! 

[Repivot]

 

On 3/30/2021 at 12:42 PM, mzinski said:

Could it be the there is enough slop between the driving pinion, intermediate wheel, and minute cannon that it takes 60 seconds to catch? 

I've dealt with this issue before in different models of watches. Your question is exactly the issue. Replacing the various components of the dial train is pretty much your only option.