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General Mach Discussion / Re: Questions 1st Aluminum Cut Sample
« on: November 12, 2012, 09:05:52 AM »
The drill point was NOT designed for normal linear cutting it is design to drill a hole THEN lower a touch to get to the flutes and then cut linear.
You need to use a center cutting 2 flute or 1 or3. AS long as it is center cutting for plunge milling . EVEN then plunge cutting takes a very rigid machine to do without crawling around a bit as it plunges.
EVEN the engraving bit must be used at very high rpms because of it tip diam being so small if you go to slow on rpm it tends to drag through the material not cut.
IF you cannot slow the rpm enought you need to go to a smaller diameter cutter. With alum it is ALL about being able to cut with min heat buildup. as soon as the alum gets too hot it gets gummy and sticks to the cutter.
(;-) TP
You need to use a center cutting 2 flute or 1 or3. AS long as it is center cutting for plunge milling . EVEN then plunge cutting takes a very rigid machine to do without crawling around a bit as it plunges.
EVEN the engraving bit must be used at very high rpms because of it tip diam being so small if you go to slow on rpm it tends to drag through the material not cut.
IF you cannot slow the rpm enought you need to go to a smaller diameter cutter. With alum it is ALL about being able to cut with min heat buildup. as soon as the alum gets too hot it gets gummy and sticks to the cutter.
(;-) TP