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  #101  
Old 09-01-2016, 11:06 AM
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Default Re: Ny-Lint Mobile Dragline Conversion

Here is a little video making a five hole bolt circle in one of the boom pulleys on the crane.

http://youtu.be/pHBZeMw3kIU

Jim
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  #102  
Old 09-01-2016, 10:13 PM
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Default Re: Ny-Lint Mobile Dragline Conversion

That's a really cool manual mill setup!
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  #103  
Old 09-02-2016, 07:26 PM
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Default Re: Ny-Lint Mobile Dragline Conversion

Interesting video jim-I don't have the digital readouts but I can do the same thing with a rotary table. Your way looks more complicated to me. Do you think there is an advantage in using your method?
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  #104  
Old 09-02-2016, 07:47 PM
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Default Re: Ny-Lint Mobile Dragline Conversion

Tom,

I have a 3 jaw mounted on my RT so the weight is at or above my ability to safely move it to and from the mill table and most of the time I have the vise mounted so that save me from the change out.

Here is something I learned from watching one of tom liptons videos of a similar topic-

For a bolt circle on a rotary table, the larger the diameter the more potential error introduced if the angle is not perfect. On the DRO, it wouldn't make any difference how large the circle was.

Another way to think about this comes from aircraft VOR navigation. At a radius of 60 miles from the transmitter station, a one degree deviation would put you off course by one mile. That would be a really large bolt circle, so probably not a concern.

Keep in mind that I only pretend to know much about this stuff!

Jim

Last edited by Rvjimd; 09-02-2016 at 07:50 PM.
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  #105  
Old 09-03-2016, 01:16 AM
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Default Re: Ny-Lint Mobile Dragline Conversion

Quote:
Originally Posted by Rvjimd View Post
Here is a little video making a five hole bolt circle in one of the boom pulleys on the crane.

http://youtu.be/pHBZeMw3kIU

Jim
Thanks Jim, had no idea on what all a DRO will do!
Cheers, Neil.
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  #106  
Old 12-17-2016, 04:20 AM
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Default Re: Ny-Lint Mobile Dragline Conversion

It's probably too late to help, but the unknown yellow machine pic you were modeling the new tracks on is a John Deere 690 / 690a

http://www.yesterdaystractors.com/cg...wlers&th=94405
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  #107  
Old 01-19-2017, 05:20 AM
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Default Re: Ny-Lint Mobile Dragline Conversion

Sorry to keep cluttering your thread up, I couldn't tell from pics.. Did you put the swing servo at the back of the house below the drums, or where the operator would sit?

If it's operator seat, still have room for a figure? If it's under the drums, hom much worse is maintenance?
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  #108  
Old 01-19-2017, 06:25 AM
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Default Re: Ny-Lint Mobile Dragline Conversion

No problem with clutter, you should see my shop right now!

My operator sits directly on the swing servo. The height worked out pretty good.

Jim
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