CNC and clock building

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cjablonski
Posts: 227
Joined: Mon Aug 13, 2012 7:16 pm

Re: CNC and clock building

Post by cjablonski »

Based upon Runges suggestions I was able to fast track the CMCO utilizing the shark for all gearing +. Below is the current status of its progress. Thanks again runge!
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20160307_220613.jpg
"I'm not smart, I just remain on problems longer"
Albert Einstein

Making many BTU by experimentation. ...some days it gets too warm :)

cjablonski
Posts: 227
Joined: Mon Aug 13, 2012 7:16 pm

Re: CNC and clock building

Post by cjablonski »

Now incorporating the day if the week wheel and moon phase mount. Next up, the motive mechanism that drives the levers. This is where the similarities to a standard clock build come into play.
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"I'm not smart, I just remain on problems longer"
Albert Einstein

Making many BTU by experimentation. ...some days it gets too warm :)

cjablonski
Posts: 227
Joined: Mon Aug 13, 2012 7:16 pm

Re: CNC and clock building

Post by cjablonski »

Now with 95 percent of all the wooden parts CNC'd. Final assembly shortly
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"I'm not smart, I just remain on problems longer"
Albert Einstein

Making many BTU by experimentation. ...some days it gets too warm :)

cjablonski
Posts: 227
Joined: Mon Aug 13, 2012 7:16 pm

Re: CNC and clock building

Post by cjablonski »

Below is the motive mechanism mentioned in prior posts. As you can see, it's very similar to a clock with regards to the pulleys and weights.
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20160323_204140.jpg
"I'm not smart, I just remain on problems longer"
Albert Einstein

Making many BTU by experimentation. ...some days it gets too warm :)

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bill z
Posts: 342
Joined: Fri Sep 25, 2015 9:09 am
Location: Spring, Texas USA

Re: CNC and clock building

Post by bill z »

On a simpler note, I found this Swiss Made wood gear clock on eBay. Not suggesting anyone purchase or not. Not even suggesting it be copied.

I thought it surprisingly simple in design. Note that it does not have a minute or second hands. That is why it is so simple.

Look at the pictures below
Attachments
SimpleWoodGearClock1.jpg
SimpleWoodGearClock2.jpg
SimpleWoodGearClock0.jpg

cjablonski
Posts: 227
Joined: Mon Aug 13, 2012 7:16 pm

Re: CNC and clock building

Post by cjablonski »

True. It is easier due to the type of escapement, a verge and foliot. Generally, that type of escapement (one of the first ) was notoriously inaccurate so a minute hand was almost a moot point. It was replaced with the more known Graham escapement (pendulum and pallets ) and others which, in its day, was the "supercomputer " of clocks :)
"I'm not smart, I just remain on problems longer"
Albert Einstein

Making many BTU by experimentation. ...some days it gets too warm :)

cjablonski
Posts: 227
Joined: Mon Aug 13, 2012 7:16 pm

Re: CNC and clock building

Post by cjablonski »

I had the opportunity to complete the CMCO yesterday, and I must say, she is a marvel to watch, almost too much to absorb with a single lever throw. It took very little tinkering to get her to work (the usual hunt for friction an minor tweaking ) bit she functions well. Below is a picture of the completed assembly, although it awaits personalization and finishing. Next up, I hope, will be a westminster chime to attach to the Marble strike posted earlier. All 3 of these devices will be connected to work in unison, I hope, by the years end. Enjoy!
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20160327_200132.jpg
"I'm not smart, I just remain on problems longer"
Albert Einstein

Making many BTU by experimentation. ...some days it gets too warm :)

cjablonski
Posts: 227
Joined: Mon Aug 13, 2012 7:16 pm

Re: CNC and clock building

Post by cjablonski »

Thought it may be helpful to post a link to it functioning

https://youtu.be/U4hNc-smxSY

Hope you enjoy it!
"I'm not smart, I just remain on problems longer"
Albert Einstein

Making many BTU by experimentation. ...some days it gets too warm :)

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bill z
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Joined: Fri Sep 25, 2015 9:09 am
Location: Spring, Texas USA

Re: CNC and clock building

Post by bill z »

For gears like the Cannon and the Intermediate Pinion gears that are cut from ½ inch plywood but are less than an inch across, I was having a heck of a time holding on to them to cut by hand, power jig saw or band saw. Sounds easy but if, like me, have big fingers and they shake, it was difficult.

For the ¼ inch gears, I have been really successful cutting these gears with using a 1/16 single straight flute end mill. But its cutting depth is only 5/16. Couldn’t find anyone manufacturing a 1/16 bit with a cutting depth of ½ inch.

I was able to leverage from the 2-Sided Machining Guide tutorial in the Vectric tutorials, where I cut one side to a depth of .3, used double sided tape on the cut side, flipped it over and cut the other side to a depth of .3.

Note here: really clean off the saw dust before applying the tape or when cutting the other side, it will let go and get sucked up in the vacuum.

http://support.vectric.com/tutorials/V8 ... g_GEN.html

http://www.bing.com/videos/search?q=2-s ... &FORM=VIRE

In trying this, I learned to NOT change bits when doing the second side. While changing bits, I knocked my CNC off by 1/16 of an inch so one side is not aligned with the other side by 1/16 of an inch. However when I changed my .TAP file to using the same bit for drilling and cutting, it worked great.

I am able to cut really nice very small gears with a real minimum of sanding.

Now, to start the assembly process.

cjablonski
Posts: 227
Joined: Mon Aug 13, 2012 7:16 pm

Re: CNC and clock building

Post by cjablonski »

Congrats bill! Can't wait to see how it's coming along!
"I'm not smart, I just remain on problems longer"
Albert Einstein

Making many BTU by experimentation. ...some days it gets too warm :)

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