Jump to content

Rack and snail and cam question

transporter

By transporter
in All Things Clocks

 Share

Recommended Posts

transporter Super WRT Addict

transporter

Posted
Posted

Westminster 3 train clock, been a long project, question is, if I set the long lobe on the centre cam towards 12 and the locking plate locked for the hour chime and strike, at the hour strike position,  would I then have the snail cam with the 12 o’clock mark also facing the 12 o’clock position? 

If this is correct then the chimes and strike should be in time am I correct? Apologies for question but I’m up against it with this one chaps, cheers .

 

clockboy Distinguished Member

clockboy

Posted
Posted

The lobes/cams you are referring too are at different heights with the hour cam giving the highest lift triggering not only the full Westminster chime but creating a warning for the hour strike. The set up I use is I don't fit the hands until I know where the sequence of the clock is. I count the strikes ie 1/4,1/2,3/4 & full chime. When movement is in full Westminster chime mode it should then give the hour chime. Once happy with this then I fit the hour & minute hands to the appropriate hour. 

Oldhippy is the best with these I am sure he will chime in soon. 

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing

  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • mbwatch
      Automatic vs Manual movement servicing

      By mbwatch · Posted

      If at all possible, find a service guide for the automatic movements your work on, because the lubrication procedures may have different requirements or rely on oils you would not use in a manual wind train (in addition to the braking grease you mentioned). Some autos like older Seikos do not have a manual wind option, so the procedure of letting down the mainspring without being able to use the crown may require a screwdriver in the ratchet wheel screw and great care. Do you have an auto movement you were planning to start with?
    • LittleWatchShop
      Breitling Navitimer 806

      By LittleWatchShop · Posted

      I am an amateur, so there's that. I do not get fixated on amplitude, lift angles, and beat error. However, 4.8ms would bug me if it were my watch. But you must judge your own skills to appreciate the possibility of going backward. I suggest, that you button it up let your friend enjoy the watch for now. As your skills progress, come back to it and correct it. I assume that this watch has a fixed hairspring pin. Some modern watches have an adjustable pin along with adjustable regulator. These are trivial to get in beat. I own a valjoux 726 my dad gave me on my 18th birthday (a looooong time ago). I broke the ratchet wheel with an aggressive wind 4 yrs ago. I have been waiting for my skills to progress before doing a service. I am close. Your advice is well placed and I will apply it.
    • tonydagee
      Unitas 6376

      By tonydagee · Posted

      I didn’t find any anomaly to the left of the red mark…reflection? this is the balance in its pivot in the inverted assembly. i can’t see any obvious kinks  and the spring is flat as far as I can see. Either the stud screw is missing, or it’s glued in… I don’t know. I’m loathe to fiddle with it. Any further insights? Thanks!
    • Bonefixer
      Breitling Navitimer 806

      By Bonefixer · Posted

      Update!  I've dismantled it, cleaned all the glue off, and rebuilt and lubricated the base movement. I'll leave the chrono part for another day. It's running well - great amplitude and keeping time, but it's got a beat error of 4.8ms.    How important is it to correct this? I'm worried that the potential for making things worse having to take the hairspring off and on repeatedly to adjust this. Would anyone here accept it at that?
    • Neverenoughwatches
      Discussing the forum in the event of no administration

      By Neverenoughwatches · Posted

      Since I've been banned from the previous discussion, apparently my language was inappropriate...for small boys. I will start another thread and act in a more decent manner for the girls and ladies of the group.  Please what will happen if the forum can't be managed by the administrator, are there provisions in place to preserve the achived member's questions and answers over the years. Please if I may ask these important questions that are important to the members please.
×
×
  • Create New...