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Originally posted by MadDogMe
How big is the I/D of the 2mm jets you are using lee?, Cathar used 0.8mm IIRC...
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the bigger than 1mm smaller than 1.5mm based on what sized drill bit i can put inside.
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The cups don't need to be flat at the bottome do they?. I'd have thought a ball end would be best, but a normal drillbit V would 'deflect' the water up and out of the cups better than a flat bottom would...
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the flatter the better. rounded cups will just make the water flow out quicker. flat ones will create the impingment effect.
also lets say i have 0.5mm between each cup and 0.5mm base. If the cups are flat the the 0.5mm base will be the same thickenss across all of the cup but if it's round or v shape then the only point that is 0.5mm is the center and the rest of the cup will be getting thicker to the edge of the cup so the cooling effect wont work as well.
some anims i did for bens new design idea thread.
first rounded cups you get a nice flow out of the cup
second flat cups
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How big a 'square' are you making with your cups lee?. For a P4 I'd try maybe a 1CM square...
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i have a 20mm x 16mm area that the cups fit inside.
http://homepage.ntlworld.com/lee_smith/25mmtemplate.jpg
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How thich is the plate you're starting from?. I'd like to try 3mm with 2.5mm cups...
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the base plate is 4mm and the point of the drill is less than 1mm above the core. before i drilled the cups i used some plexi so i could see how close i was to the base.
I think the v shape is one problem and getting the cups spaced is another.
i need to check that the chuck on the piller drill is pushed on enough so i can stop the wobble and then i should be able to use the end mill.