Jump to content

Recommended Posts

Posted

We've all been board recently, well some of us have, so when I was offered a ships 8 bells that was a non runner, I was jumping up and down. 

Well I was until I opened it up, oh teeth on the rachet wheel missing, mainspring, and to make it worse something I'd not really come across very often, the barrel hook for the mainspring had distorted the barrel to such a point that had bowed out ond was jamming the 2nd wheel. 

So not an easy fix, so I had to file the barrel down to get it to pass the 2nd wheel, repair the end of the mainspring, rebush the barrel give it a good service and its together and running again. 

The case wasn't as bad as the movement, I've polished the case and lacquered it, so now it's looking pretty good. 

I don't know if anyone recognised the movement, perhaps you could let me know if you do. 

IMG_20210213_190955.jpg

IMG_20210215_183917.jpg

IMG_20210215_183840.jpg

Posted

Modern and made of poor brass? soft as you know what. The steel will be soft as well. They always put powerful springs in these things and they cause all sorts of damage teeth become out of shape hools wear and so do the pivots. I haven't seen this type before but many kicking around come from China or India. 

Posted
2 hours ago, oldhippy said:

Modern and made of poor brass? soft as you know what. The steel will be soft as well.

I know you have made this comment many times before. But I find it really strange. With present day knowledge of metallurgy as compared to the 19th century, why is modern brass not as good as vintage brass? 

Could it be due to cost cutting measures of modern manufacturing or the ethics of the manufacturers today?

It's like in dentistry. Some of our modern "improved" materials do not perform as well as our old stuff. It's like we took one step forward and two steps back. 

But being a man of science, I cannot accept that science has failed us. 

Posted

Take Longcase clocks (Grandfather Clocks) as an example  made hundreds of years ago and still going strong, did you know some of these clocks still have never been rebushed or had parts replaced. This ships clock in about 20 years it will be worn out.  It's down to quality of the material used, they can't afford to make things last because if they did they wouldn't make any money and employment would be much higher then it is. 

On a lighter note I like the song by Neil Young called Piece of Crap. 

  • Haha 1

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.

  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • Interesting, thanks for the detailed post. I saw one of those Swiss Nano machines a while back in another youtube video from  the Weiss Watch Company.
    • Hello and welcome to the fo4um. Enjoy
    • Welcome to the forum, enjoy.
    • You're asking a pretty broad question and you didn't specify the machine but yes it's simple especially if you have the right machine. The question has problems but I'll take it as it is. Is it really that simple yes especially if you have the right machine. So in the video below he's making a screw and yes it really is that simple but pay attention to the machine it is not simple at all probably wasn't cheap but it is small it will probably fit in your garage. Unfortunately wouldn't fit in my garage as it's far too cluttered up with things. In the video he talks about making a screw and pay attention to the machine. The machine has lots and lots and lots of cutters and lots of things to do lots of machining all-in-one machine conceivably one step after another all programmable. If you look at his channel lots of CNC's stuff and there are several other videos related to this machine. He goes to the factory where they talk about it and show all the other machines they make in Switzerland.  I did look up the specifications the machine I don't recall the price it's not going to cut wheels I think it has a maximum diameter around 11 mm basically it's really good for making small diameter watch parts. Then in one of the other videos he goes to a factory that used to make parts with waterpowered machinery been in business for 100 years and everything they now make is made with CNC machines including this one. What was interesting with the factory photo was that when they make some parts they can put them on a optical comparator comparator compares with whatever the reference is and the machine can be programmed to adjust its cutting to make sure everything is actually being made to specifications. Oh and then somewhere in all of this there was at least one picture of a balance staff can't have a CNC Swiss machine without making balance staffs.   It would be really nice if we had pictures of the machine. Then yes if you look at the page for wheel cutting you can enter parameters and it will generate a G code but he left out things? Notice he has a picture of a complete wheel but the G code isn't making a complete wheel it's only cutting the gear teeth I don't see whereas the program for crossing out the spokes? Typically when you see people cutting gears once the teeth are cut most the time the spokes are cut by hand. Occasionally someone will mill them out but typically not with the program which seems strange if you have CNC capability for instance one of my friends fill it used to design assembly line equipment or things to make things. So his hobby was to continue to make tools to make things like clocks. Very interesting and clever clocks but his true fund was making the machines to make the clocks. Then machine is not controlled by G code like we would typically find today as the stepping motor controller he has was made a long time ago and the individual controllers used a textbased program. So the company had a editor you could write a program to cause each the stepping motors to do something. So basically once you figure out how to cut a gear he would just change the parameters for different size gears so here's an example of a gear as you can see we have the teeth and the spokes. Then we have a picture the machine which sucks because it would've been so much nicer if I could've taken a picture when it was cutting a gears so we can see things better. Then yes there is a worm gear stepping motor indexing this is a mini lathe and the indexing is at the end of the lathe head hiding. The basic operation of this machine would be brass sheet not cut to a specific diameter size not even round mounted on the machine. Then it turns and a milling cutter will cut the diameter. Then the gear would be cut with a gear cutter. The same mill cutter for the diameter although conceivably change the size I don't know but basically the same milling for cutting the outer diameter would be used to cut the spokes. I really can't remember how he did the center hole but whatever it was was very precise.          
    • Yeah I know the site and the creator of it.  the two video clips are good examples of the quicker method and a full tear down.  the quick method will work in many cases. But not always and not for all the different movements.  I strongly suggest to not bend the four tabs as was done in the first clip.  Instead there are three tabs that insert into the top plate, Much saver way as to not break a tab.
×
×
  • Create New...