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Show"N"Tell ( What you have made with your CNC machine.) / Re: Some new toys for my Taig
« on: June 28, 2008, 09:13:05 AM »
Thanks for the info Dave,
IÂ assume that the plate you show is the base. You may want to consider porting and sectioning the base such you can put some small items or large items on it. Additionaly, if the base is sectioned as shown by the grey lines and you can turn off a section so more of the vacuum pumps suction can be applied to section being used. Placing tape or dense hard rubber over open holes would seal unused holes. The attached shows a number of holes in the top plate and the sectioning of the bottom plate. Makes it more complicated but more usable. You may want to get some Corian scraps and try that for a base.
Keeping it real "rough & basic" from the design point of view for the top plate.
If a perfect vacuum was pulled then you would get a holdown equal to 15 # per square inch. With an 1/8" hole,
it's area would be .012 sq in and times 15 #/ sq in = .2# of holdown per hole. With leackage, assume you get only
.1 # of holdown. This gives you an idea on the number of holes and would change how the base was ported for a section. Just a few thoughts.
RICH
IÂ assume that the plate you show is the base. You may want to consider porting and sectioning the base such you can put some small items or large items on it. Additionaly, if the base is sectioned as shown by the grey lines and you can turn off a section so more of the vacuum pumps suction can be applied to section being used. Placing tape or dense hard rubber over open holes would seal unused holes. The attached shows a number of holes in the top plate and the sectioning of the bottom plate. Makes it more complicated but more usable. You may want to get some Corian scraps and try that for a base.
Keeping it real "rough & basic" from the design point of view for the top plate.
If a perfect vacuum was pulled then you would get a holdown equal to 15 # per square inch. With an 1/8" hole,
it's area would be .012 sq in and times 15 #/ sq in = .2# of holdown per hole. With leackage, assume you get only
.1 # of holdown. This gives you an idea on the number of holes and would change how the base was ported for a section. Just a few thoughts.
RICH