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Thread: My Wooden geared clock
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9th June 2012, 09:06 AM #151Senior Member
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Thanks Russell..had to take my CNC apart to get the frame member on the bed! It really spins nicely...didnt realise as I said before, that this wheel turns the whole time not just when you wind the clock up... and now here are some pics of the wheel clamps as promised. ........
Still have to thread the shaft, groove the weeels for the string, buy the fastners and remake the ratchet cluster and pauls...etc..
and now I am off to help a friend move house!
Dont those clamps look great!
Dean.
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9th June 2012 09:06 AM # ADSGoogle Adsense Advertisement
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11th June 2012, 11:36 AM #152Senior Member
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For the last couple of days I have been mulling over how to finally secure the square shaft of the ratchet winder. While it is tight for now when it has to consistenly wind up 10kgs it will just slip unless fastened to the shaft with more pressure than the front screw can privide. I came up with the bright idea of soldering it but then re-realised that both ends of the shaft have square shafts on them that are bigger than the bearing it passes through!. I thought about a keyway but I dont have the machine to do it. How would you create a stopped internal square housing ? Not without a machine. I might just use a long grub screw and shorten the front bolt. Unless someone has a better idea.
To make a perfect bearing press fit for the ratchet winder I used the CNC. I had to remove both the front and back cover plates. I didnt realise the machine had a rear cover plate that was removable; just as well for me.
I am now thinking that the top plate in my design can be completly made by the CNC since discovering that the CNC has a removeable rear panel as well as the front. I could use my trisoloc joint to make the the plate in three parts. Hopefully that will be todays job.
Here is a pic of the top plate I will be re designing. The mini gogs (the little cogs in the midde) mounting will be interesting; how to mount them in an aesetic manner.
cheers for now.
Dean.
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11th June 2012, 11:41 AM #153
G'Day dean & Russell,
You two blokes are having fun with the clocks.
here's a free plans website I found that may interest you??
Cheers, crowie
7 Free Wooden Gear Clock Plans for You Eccentric, Masochist Woodworkers |
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11th June 2012, 11:52 AM #154Senior Member
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Well it has been fun....but slow. That Dec 1 (this year) deadline is looming and we have to move house prephaps in 4 weeks. I would like to think I will make another clock and I am attracted to the clayton boyner designs. Thanks for the link Crowie.
Dean.
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11th June 2012, 12:07 PM #155
The String.
Hi Dean,
No nothing about Clocks, & have not read all the Posts.
You mentioned, that you are about to go & buy " The String ".
A Friend of mine has made a few All Wooden Clocks. " Nine Fingers " by Username.
He experimented with several types of " String " & finally came up with " Kevlar " as it was the only one not to bind.
Not sure if that helps.Regards,
issatree.
Have Lathe, Wood Travel.
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11th June 2012, 12:55 PM #156Senior Member
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Hi Issatree
I have used kite string which has a breaking strain of 90kgs! I only have 10kgs to hold. I dont know whether its has kevlar or not but its bloody strong for its diameter!
Dean.
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12th June 2012, 03:29 PM #157
Hi Dean
Good to see the clamp works as good as we thought.
After seeing what involved with the winder I am glade I used a counterweight for rewinding. But you have persisted and is coming together well, it looks the part.
As for the string I am using a polymer thread used for fishing with a 80kg breaking strain. It is also a small diameter for the small drum I am using.
Dean how did that ratchet design go that I sent you?
Russellvapourforge.com
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14th June 2012, 10:29 PM #158Senior Member
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Hi all...
Russell the ratchet design is good and have created all the files to create it. I made a start and cut up the stock as seen in the pic below.Tomorrow I will cut the bearing recess, finish the teeth and the bolt holes. I wasnt going to use my trisoloc design on such a small gear but one of these I previuosly cut out warped!
As far as twine is concerned dont you find that the nylon stuff is hard to tie a knot in?
Dean.
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15th June 2012, 09:03 PM #159
Dean
Good to hear the ratchet design is going to work for you.
Got to say I am always impressed by your joining method on the blanks you make. It certainly adds a lot of interest to the parts as well as strength
Russellvapourforge.com
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16th June 2012, 03:32 PM #160Senior Member
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Thanks russell.Its a nice rainy day here in Sydney; a nice day for spending in the shed me thinks. Here is the completed ratchet cluster as I call it. The main reason for re-building the cluster was my fear of the paul slipping and the weights crashing down and damaging the purpleheart frame on the way down. Russell had a 2 paul set up and modified his ratched teeth to maximise the gripping area on the ratchet face;I have copied the Idea. (good on you Russell!!)
The first pic shows the old cluster with brass tube as the bearing while the second pic shows the new ratchet cluster that now runs on bearings.
The next pic shows the Ratchet and 15T gear before the bearings are pressed in. You will notice 2 small holes right on the diameter of the bearings; these are press holes that alow you to remove the bearing from the blind hole. (really important if you ever want to remove the bearing!)
The next pic shows the parts ready to be assembled including the drum.The silver spacer is a hard disc that has been resized to 60mm. This stops the string from fouling the pauls as it turns on its travel. Obviously I had to re-drill the holes.
The next pic shows shows how close to the drum the bolt holes are. The original drum was 38.5mm while the new one is 43mm. Hopefully that wont affect the running time too much.The final pic the comparison of the old ratchet teeth compared to the new saw tooth like one. Will now install the twine and re-install the shaft back on the clock. Thats all for now.
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18th June 2012, 04:17 PM #161
Looking real good. You do finish things off so well.
Are you going to put 2 pauls onto your clock?
With the larger drum you will need less weight as for the run time from my quick calculation I see a 10% shorter run time
Russellvapourforge.com
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18th June 2012, 08:17 PM #162Senior Member
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Oh dont like the shorter run time but do like the reduced weight! Compromise..the stuff of life. With a drop of close to 2200mm I am happy with the figures. I do intend to have 2 pauls...managed to groove the weight wheels yesterday...finally. Getting closer every day!
Dean.
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19th June 2012, 08:55 PM #163
Dean
There nothing like a metalwork lathe for wood work ....It's always spot on
It will be interesting to see if there any weight reduction.
Keep plunging away you will get there
Russellvapourforge.com
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19th June 2012, 10:04 PM #164Senior Member
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Thanks Russell, thats one of the main reasons I bought a metal lathe...to do accurate woodwork!. I too will be interested if there is any weight reduction. I will be starting the final trisoloc gear; the 6 spoker. Brought 1.5 m of euro beech today should be the final purchase of timber for this job. Hopefully.
Dean.
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20th June 2012, 05:53 PM #165
Dean
who do you get the timber from?
Russellvapourforge.com
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