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Author Topic: Some recent modeling  (Read 1534 times)
kvom
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« on: March 12, 2017, 13:36:13 pm »

This is a video of the Coventry engine from plans by Roy Ouzof.

https://www.youtube.com/watch?v=DhFdTjbsr9Q

Current engine is the Benson, an engine from 1862 with plans by Anthony Mount.  I decided to start with the governor since the parts are so small;  I was concerned that I might not be able to work with such parts.



The fasteners are 0-80 and the entire assembly is 3" tall.
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Bubba
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« Reply #1 on: March 12, 2017, 20:33:06 pm »

Nice! More pictures.. Cheesy Grin
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kvom
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« Reply #2 on: March 13, 2017, 00:22:55 am »

Here's today's output.  Eccentric straps.

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Dragonfly
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« Reply #3 on: March 13, 2017, 09:46:28 am »

Keep posting them, kvom Smiley
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EddyCurrent
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« Reply #4 on: March 13, 2017, 10:57:46 am »

One of the greatest challenges is finding a way to hold the item while it's being machined.
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Garyhlucas
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« Reply #5 on: March 13, 2017, 12:59:31 pm »

Holding a part is the challenge at any size. I have to say that holding tabs in CamBam have been huge for me. One tool I have made that I find very useful is really long strap clamps with the front end open. Two parallel bars spaced apart by a threaded rod coupling and welded. Used to reach right to the middle of a flat sheet you are cutting from, and quickly removed or relocated. Machinists always laugh when I weld up a set, then I see them using them!
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Gary H. Lucas

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 http://a-little-business.blogspot.com/
Dragonfly
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« Reply #6 on: March 13, 2017, 13:54:19 pm »

Gary, could you post a photo?
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Bob La Londe
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« Reply #7 on: March 13, 2017, 14:25:31 pm »

I want to see it running balls out.

I've wanted an excuse to say that ever since I learned what it meant.   Grin 
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If I have the time I'll be glad to show you a little in my shop. 

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http://www.CNCMOLDS.com
lloydsp
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« Reply #8 on: March 13, 2017, 15:22:15 pm »

And,
When they had a fly-limited governor, "Balls to the wall."

Lloyd
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kvom
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« Reply #9 on: March 13, 2017, 18:00:05 pm »

For many of the small parts I'm using a 3" machinist vise that in turn I mount in the mill.  Much easier to work with and examine before machining
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Arie kabaalstra
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« Reply #10 on: March 19, 2017, 21:55:15 pm »

For holding Brass parts, just solder them to a "Sacrificial block". i use that all the time.. i have some 2mm brass sheet lying around for just that purpose, when milling 0.2 mm thick parts like watch-hands, dials and such.. after milling, gently heat until the solder melts, clean up back surface, and you're done!.. (Don't tell anyone.. it is a secret.. really Grin )
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kvom
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« Reply #11 on: March 19, 2017, 23:43:14 pm »

A few more:



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lloydsp
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« Reply #12 on: March 20, 2017, 00:07:47 am »

Wow!  I'm guessing I'd have trouble fixing those on my table!  I don't have a vise that small AND precise.

(didn't mean to make it rhyme, but it did!  Cheesy)

LLoyd
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Dragonfly
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« Reply #13 on: March 20, 2017, 11:13:35 am »

.. (Don't tell anyone.. it is a secret.. really Grin )
I promise Smiley
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dwc
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« Reply #14 on: March 20, 2017, 20:25:21 pm »

(Don't tell anyone.. it is a secret.. really Grin )

For relatively big pieces, (bigger than a dime) gluing with super glue is cleaner and faster, both gluing and ungluing, but for small pieces solder is the only way to really hold then still.

Don
 
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