hackR Posted June 11, 2011 Report Share Posted June 11, 2011 Have a chrono avenger with a7750 6-9-12 movement...on occassion, when I hack the movement to sync the time, set the time or set the date - when I push the crown all in, the seconds, run but the minute/hour hands get “stuck"....I then pull the crown out, reset or move the hands, then eventually they "engage"....it's intermittent...have had this also happen on a previous skyland... The secs at 9 run, so it's not the hack lever...any ideas?...anyone else have this problem? Thanks...R Link to comment Share on other sites More sharing options...
RWG Technical Posted June 12, 2011 Report Share Posted June 12, 2011 If it hasn't been serviced, like all factory fresh A7750's, the cannon friction is virtually nil, no friction, means no drive to the hands... When you move the crown you also move the cannon gear and it "grabs" every now and then. Link to comment Share on other sites More sharing options...
hackR Posted June 13, 2011 Author Report Share Posted June 13, 2011 Thank's, R...appreciate the learning... (hope all is well....hi to J...) Link to comment Share on other sites More sharing options...
Rolexman Posted June 13, 2011 Report Share Posted June 13, 2011 yup! The master has spoken Link to comment Share on other sites More sharing options...
Ronin Posted June 13, 2011 Report Share Posted June 13, 2011 If it hasn't been serviced, like all factory fresh A7750's, the cannon friction is virtually nil, no friction, means no drive to the hands... When you move the crown you also move the cannon gear and it "grabs" every now and then. When properly serviced, what increases this friction? Oil? -or some mechanical tweak on assembly? Link to comment Share on other sites More sharing options...
Bike Mike Posted June 14, 2011 Report Share Posted June 14, 2011 When properly serviced, what increases this friction? Oil? -or some mechanical tweak on assembly? The proper type of lubrication...Jisma is what I use. Pretty green in color. Allows for the right amount of friction to run the hands but not so much that it prevents the required amount of slipping to set the time via crown. Unserviced are way over oiled. Link to comment Share on other sites More sharing options...
RWG Technical Posted June 14, 2011 Report Share Posted June 14, 2011 When properly serviced, what increases this friction? Oil? -or some mechanical tweak on assembly? In my case your second option, a "tweak" of sorts that restors the friction of the gear to the correct level. Trade secret you know... Link to comment Share on other sites More sharing options...
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