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A Beginners Clock

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#1
Have you ever wanted to make a clock BUT came up with a list of problems like .
Cost of brass---cost of cutters--plans- dividing head---I havent the knowledge --ETC ETC.

Have you a lathe With very little accesories, and wonder what you can make.

In this project I will be using only my basic 7x12 as it came in the box--a small bench drill-- A Dremmel type mini drill. And the normal hand tools found in a shop.

If we need other tools we will make them, But we are not going to spend a lot of the green crinkly stuff.
:nono:
Many plans start with a simple clock design then try to make it on a lathe.
But I have turned this around, saying, what can I use on this lathe and drill, to make a clock.

The design of the gear train allows all the gears etc on this clock to be made by direct indexing from the 60t and 80t gears that come with the lathe
no fancy compound gearing to get the right tooth count.

The design will be based on Janes Clock but with a lot less brass, only the gears will be of brass.
the frames etc will be blued steel I expect the cost to be less than a 1/3 of Janes Clock

The first test gear has been made with a home made cutter so i am on my way!

I have just rememberd I havent compressed the photos so I will do another post with them in.
:nuts:

Brian.

Immagine 016.jpg
 
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Tom Griffin

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#2
Re: The next project

Brian,

I would be interested in seeing how you made the cutter for the test gears.

Tom
 
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#3
Re: The next project

Hi Tom

I was rather thinking that this was the first question that was going to be asked.
well here it is.in all its simplisity



P1011796.JPG


Using a tool ground to the correct radius turn down a piece of 1/4"silver steel until the tip is the same as the bottom of the cut,

P1011798.JPG



Halve it ,this can be done in the lathe with a fileing rest. harden and temper.

Immagine 013.jpg

Use in a tool post milling attachment.( home made out of scrap )

In the photo of the 2 gears, the test one is on the right the other was cut on the mill with a commercial cutter

At this stage I still had a bit of work to do on the indexing on the lathe but I think it stands up quite well.

It certanly ran well against the other gear.

Brian.

P1011796.JPG P1011798.JPG Immagine 013.jpg
 
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Tom Griffin

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#4
Re: The next project

Brian,

So you aren't generating a true cycloidal tooth profile, just a approximation. How did you decide what radius to use on the cutter for that particular gear?

Tom
 
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#5
Re: The next project

I mesured the existing cutter with a gauge.
My cutter fits the original gear perfectly so if its good enough for them its ok for me i reduced the length of the cutter to make the tip stronger, trad style teeth are very deep but this is not nessasary, more modern clocks have
shallow teeth or even rounded bottoms.
There is a program in M.E. utilities to find this radius if you dont have a cutter to copy.
One of my problems is to keep this project simple so a newbe can build it with little tooling and keep the cost down .
What you will see is a prototype, if i manage to make a clock that works and looks good I will make it into
a plan/book with lots of photos including the making of the cutters ,milling spindle, ETC .

Brian
 
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Tom Griffin

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#6
Re: The next project

Thanks Brian.

I scoured the M.E. website for that program but was unsuccessful. Do you happen to have a link to it?

Tom
 
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#7
Re: The next project

Hi Tom
when H.M: had the first system it was in the downloads I think

anyway try www.alanjmonday.info he put it together.

For me the profile just has to work as it is running against lantern pinion trundles, simply round pins that do not even have to be of a particular size, just so long as they
fit between the teeth with enough clearance and are strong enough.
Dont confuse clockwork with top end enginering : That it is NOT.

Brian.
 
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#8
Re: The next project

Back again
also try

M:E:W:-----March/ april------1997-page52

Iam told this was a update. tho I have not seen it.
Let me know how you get on

if you cant get it I may be able to send you a copy of what i have.

Brian
 
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Tom Griffin

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#9
Re: The next project

Brian,

As it turns out, I had the answer to my question all the time. My search of the M.E. website turned up an article by David Creed on making your own cycloidal cutters that referenced "Wheel and Pinion Cutting in Horology" by Malcom Wild. Duh! I added that book to my library last spring and never got around to reading it. It goes into great detail on making your own cutters, including all the different radii for any size wheel or pinion imaginable. If you don't have this book, you may want to check it out. It also mentions a device called the "Eureka continuous form relieving attachment" for reliving the form on multi-tooth cutters. It sounds like drawings may be available to make one, so the search continues...

Tom
 
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#10
Re: The next project

Thanks for the info Tom.

It just shows that it pays to read what you type .
In the photo of the two gears the test gear is on the LEFT. not as stated.
I must be getting daft. :nuts:

Brian
 
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#11
Re: The next project

So lets get started by introducing the main tools that you have not got.

The fileing attachment is a very useful tool for making flats , squares,etc in the lathe.
View attachment 43054

It fits on the vertical slide so the depth of cut can be adjusted.



View attachment 43056


Did I hear a comment that we dont have a vertical slide
Take a close look and you will see that its the compound slide, back to front, on a angle bracket.


View attachment 43057


So all we have used so far is a few bits of metal ,Mostly scrap, and we have got some useful tools


Brian
 
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#12
Re: The next project

When I try to open your attachments I get an invalid attachment note???

"Billy G" :thinking:
 
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#13
Re: The next project

Thanks Bill will try again.


fileing rest.JPG


rest.JPG



P1011854.JPG


I hope this is better


Brian

fileing rest.JPG rest.JPG P1011854.JPG
 
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#14
Re: The next project

You're OK now Brian.


"Billy G" :))
 
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#15
Re: The next project

So we will continue. the next tool is the milling spindle.

This was made from sq tube from a scrap steel chair.

2 brass pipe fittings.

A piece of scrap plate

A length of steel bar from the local blacksmith (free)

A scrap steel punching.

Milling spindle.JPG

This fits on the vertical slide and is driven by a motor bolted to the end of the lathe bed.

drive.JPG


If you are wondering how the motor came to be in my list of tools ??? it came of the bench drill.

brian.

Milling spindle.JPG drive.JPG
 
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#16
Re: The next project

We nave coverd the gear cutter, so the last problem on the lathe is to index the gear blank

This will be done using the 80t and 60t gears that came with the lathe.

single pawl.JPG

The lathe is now fit to cut gears so we can turn our attention to another usefull item.


Protractor back plate.JPG

This is a backplate for the chuck .

P1011856.JPG

It fits into the centre hole of the drill base very useful for spacing holes.


P1011852b.JPG


With the angle bracket it can also be used verticaly.

Other small tools as we go along.

Brian.

single pawl.JPG Protractor back plate.JPG P1011856.JPG P1011852b.JPG
 
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#17
Re: The next project

Ok so now we start the real work.

The clock has 5 gears 2 escapement wheels and a ratchet that must be made from engraving quality brass. may be the ratchet may possibly be of mild steel to keep the cost down

So I started on the ratchet as it has the smallest number of teeth.And the cutter worked well thro the 1/16" blank in one pass.no problems.




P1011846.JPG

P1011846.JPG
 

alandarkdale

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#18
Re: The next project

Wonderful start to another obsession. Thanks a lot!

There are enough projects in the works here that I can convince myself to just watch this thread rather than feel compelled to go digging for metal to use.

Dale
 
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#19
Re: The next project

Having proved that the cutter works. the next job is to make the escape wheels while we still have the cutter set up. so 2 blanks are fitted to the arbor, so we can cut them as a pair. the radial faces are cut first then the back slope.

P1011851.JPG

P1011851.JPG
 
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#20
Re: The next project

So the next job is to cross out the wheel to make it lighter, and better looking.
I am trying to keep away from the traditional method because, I feel that a lot of fuss is made of this by clockmakers, and it deters those new to engineering.


P101185j6.JPG

Off to the drill.

A little bit of sawing and simple fileing and we have one of our wheels nearly finished

P1011j856.JPG


Brian.

P101185j6.JPG P1011j856.JPG
 
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Tom Griffin

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#21
Re: The next project

Looking good Brian!

Did you mill out the scrap between the teeth, or file it?

Tom
 
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#22
Re: The next project

Hi Tom
As stated in the intro to this thread only the basic lathe --drill--and mini grinder(Dremel type) will be used.:nono:

So the parts between the teeth were sawn out then cleaned up with a swiss file. also the crossing was delt with in the same way.
Brian.
 
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Tom Griffin

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#23
Re: The next project

There's no need to get snippy. :rolleyes:

I saw your 3 jaw and assumed it was sitting on a rotary table. So the crossing out was done with a file as well, you just drilled the ends of each slot.

Tom
 
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#24
Re: The next project

The chuck with its protractor has a spigot that fits the centre hole in the drill table, and is locked from underneath.

Yes the holes are drilled at the correct angle then sawn and filed.

Brian.
 
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#25
Re: The next project

And another to make the pair.
:))
P1011861.JPG

Brian.

P1011861.JPG
 
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#26
Re: The next project

Back to the shop to cut the reverse minute wheel. this has 32 teeth so i used the 80 tooth change wheel to do the indexing.

P1011869.JPG





P1011871.JPG



P1011872.JPG

Very happy with the result :))



Brian

P1011869.JPG P1011871.JPG P1011872.JPG
 
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#27
Re: The next project

So then its on to the big one. 80 teeth 1/8" thick

To my suprise I cut the teeth on this gear in 45 mins And I stop the spindle between every cut because i index by turning the chuck with my right hand while indexing the master gear with my left, and I like my fingers.

The plastic clamp on the gear is to stop It ringing.

P1011870.JPG

P101187j1.JPG


Just 2 more to do.

brian.

P1011870.JPG P101187j1.JPG
 
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#28
Re: The next project

At last all the wheels and the ratchet are done.
The next job is the pinions..:))

P1011873.JPG

Brian.

P1011873.JPG
 
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#29
Re: The next project

While I am waiting for the pinion wire to arrive. work has started on the plates and post's.

The clock has also been given a name (Dark Lady) because of it being blue steel rather than Brass..

So having given it that name what better way to finish the plate ends than with the Ace of Spades.

The top cross post has to be cross drilled to take a brass bush so a flat was filed in the lathe using

the fileing rest then marked out for drilling.

P1011875.JPG

P1011884.JPG

P1011885.JPG

Slowly, Slowly.


Brian.

P1011875.JPG P1011884.JPG P1011885.JPG
 

Rockytime

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#30
Re: The next project

Good thinking out of the box!
 
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