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Lenzkirch running fast.

Darrmann39

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Dec 6, 2020
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I got this lenzkirch at an estate sale. It wouldn't stay running.
Broke it down cleaned it put it back together.
And got it running but it doesn't seem the pendulum is swinging as far as it should.
So it's running fast. 5 minutes in less then 24 hours. Dropped the pendulum and it won't stay running. I'll ad a pic of where the pendulum arcs at on bottom gage.
I'm pretty sure this movement was not originally in this case. It has to do with the bottom bracket on movement and bracket mounted in case were modified to fit each other.
Question is could it be too light of weight not giving out enough power to make a wider arc of the pendulum. Longer arc slower time. Smaller arc faster time kinda thing

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shutterbug

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Just for a place to start, take off the seconds bit and see if there is any improvement. Sometimes they rub on the dial and rob power.
 

Darrmann39

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Dec 6, 2020
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Just for a place to start, take off the seconds bit and see if there is any improvement. Sometimes they rub on the dial and rob power.
I did that but it gives no indication of it rubbing it's very centered and moves very easily.
 

shutterbug

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Did you do any bushing work on it? Those clocks are pretty fussy.
 

shutterbug

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Try rocking the main wheel and see if any pivots are jumping around. You are losing power someplace, and the pivot holes are the likely culprits.
 
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Darrmann39

NAWCC Member
Dec 6, 2020
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Try rocking the main wheel and see if any pivots are jumping around. You are losing power someplace, and the pivot holes are the likely culprits.
Funny thing i think i might have figured it out. As i said I'm pretty positive this was a replacement movement, not sure the weights are too movement or to old movement
I taped the weights together they are 3½ tall each not sure of weight. And am getting a nice swing now.
It's already slowed down time by a bigger pendulum swing.
Pretty sure i need 6" weights. Have a set I'm bidding on

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Kevin W.

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Apr 11, 2002
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You have 6 pounds in weights on it?
 

Darrmann39

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Dec 6, 2020
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You have 6 pounds in weights on it?
With 2 attached together is 5ilbs. My weights are 2½each. So working good with 5ilbs i bought two very nice 4 ilb. Weights in thinking should be fine with plenty of adjustment left in pendulum Bob
 

Kevin W.

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I am still confused, is this two weights together on one side?
 

Darrmann39

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Dec 6, 2020
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I am still confused, is this two weights together on one side?
Yes. I had an idea about the weights. As i said wasn't positive they were correct.
What i think i have is a incestuous marriage lol. An original lenzkirch clock that for some reason was replaced with another lenzkirch movement. I know for a fact they weren't originally together. Had to do with the mounting brackets. Not why we're here but thought I'd explain why i wasn't sure if they were also correct weights.
So at first as seen in pic pendulum was only going to big inside marks on swing gage. I could actually reach in and put a little pressure on main wheel and keep it going a bit farther then those marks. As soon as i let off it would slow.
I then taped both my 2½ ilb weights equaling 5ilb together and put it on. Presto swinging immediately to outside big marks on gage. And keeping time.
I think it was underpowered because of weight.
Found some 5" 4ilb weights i bought
 
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kdf

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Aug 26, 2011
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These movements require 1,2-1,4 kg weights. It should work even with 0,7-0,8 kg weight when everything is in order. If you use heavier weights it will increase wear of different parts. Check if the pendulum is rubbing somewhere, and if the anchor have proper end play when pendulum is attached...
 

Darrmann39

NAWCC Member
Dec 6, 2020
145
17
18
54
Country
These movements require 1,2-1,4 kg weights. It should work even with 0,7-0,8 kg weight when everything is in order. If you use heavier weights it will increase wear of different parts. Check if the pendulum is rubbing somewhere, and if the anchor have proper end play when pendulum is attached...
Exactly thanks 1.4 kg is just over 3.6ilbs which is the ones i bought. It does work with the lighter ones just not right. No pendulum rub , haven't removed the movement to see the anchor since i or out back in but I'm sure it isn't getting any end play because of the lack of power from light weight would be my thoughts
 

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