This design is the best so far as with different o rings you get different hold down techiniques
with 4 of these hold downs ,you7 get a lot of vac power to hold a large surface area
Took about 40-45 mins to make
also added a few tests using 2 vac clamps
flexible vac hold down device and tested
Re: flexible vac hold down device and tested
That is a very nice clamp design.
What size o rings are you using and where did you source them from?
bob
What size o rings are you using and where did you source them from?
bob
Re: flexible vac hold down device and tested
the orings came from lee valley tools less than 6.00 per package of 3
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Re: flexible vac hold down device and tested
Great job..
I assume the materials from AllStar gaskets would work as well. Those O Ring gaskets very well though.
It the Aspire file on your clamps something that you would be willing to share?
Again, Great job,
Kelly
I assume the materials from AllStar gaskets would work as well. Those O Ring gaskets very well though.
It the Aspire file on your clamps something that you would be willing to share?
Again, Great job,
Kelly
Dyna CNC Plasma/Router
USAF-- Fadal 4020, Shopbot PRT 4X8
USAF-- Fadal 4020, Shopbot PRT 4X8
Re: flexible vac hold down device and tested
Stan
I really like your Vac hold down.
I have made several of my own but nothing like yours.
Would you be willing to share the file?
Thanks
Bill I
I really like your Vac hold down.
I have made several of my own but nothing like yours.
Would you be willing to share the file?
Thanks
Bill I
- rscrawford
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Re: flexible vac hold down device and tested
That is a classic vacuum pod design!
A couple of suggestions if you want a vacuum hold down for very accurate work.
There needs to be a positive stop, so the Z-height is always accurate. The easiest way to do this is to have a gasket that will compress enough that your workpiece sits directly on the vacuum grid. If the workpiece is sitting directly on the gasket with no positive stop, then the z-height will vary depending on the strength of the vacuum (the gasket can deform unevenly).
To go along with this, you want the vacuum hole to be in a groove, rather than on the top.
A couple of suggestions if you want a vacuum hold down for very accurate work.
There needs to be a positive stop, so the Z-height is always accurate. The easiest way to do this is to have a gasket that will compress enough that your workpiece sits directly on the vacuum grid. If the workpiece is sitting directly on the gasket with no positive stop, then the z-height will vary depending on the strength of the vacuum (the gasket can deform unevenly).
To go along with this, you want the vacuum hole to be in a groove, rather than on the top.
Russell Crawford
http://www.cherryleaf-rustle.com
http://www.cherryleaf-rustle.com
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Re: flexible vac hold down device and tested
Good information. Thank you.
Stephen R.
Stephen R.