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What in the world would you ever use it on??? John
Never mind what you have to do with it, I want to see the machine that made the cutter
Should work to carve a helmet for your pet flea!
Break 'em & you'll pay for it somehow.... Hope it all goes well! John
Theyre about $50 each. Dave
G-Wizard recommends a .0001 DOC for slot cutting at 30K RPM and 11 ipm in brass.
A Tormach with steppers. They claim 0.0025 micron resolution but its my second biggest concern First is touch off....
Quote from: steamer on February 14, 2019, 11:12:07 AMA Tormach with steppers. They claim 0.0025 micron resolution but its my second biggest concern First is touch off....They do? I'm fairly certain it's 2.5 micron(.0001").Is tool runout going to be low enough to use both flutes to cut?
My understanding is that to get the lowest possible runout, the spindle needs to have air bearings for both axial and length positions. The most accurate collets I know of, are hydraulic collets that distort to hold the cutter.Grade 3 ceramic balls are to or better than 0.00008mm for roundness and size variation from the smallest to the largest. Places like Cerbec can supply balls tested to 0.000026mm for roundness and variation at a cost . There may be better and more accurate balls, but then the housing and the outer and inner races have to be made super accurate as well. A lot of steels are just not stable enough to make things from to be that accurate. Which is the reason for testing of gauge blocks and micrometers on a yearly or so basis. I know that the concentricity of the spindle bearings in the cylindrical grinder is 0.0003mm aproximate , it may be 0.0004mm but is less than 0.0005mm total run out. The housing bearing is ground in situation on the work head, and requires to be returned for the factory to refurbish it.I would think that a concentricity under 0.0005mm is about all you could ever expect.When you get to measuring things less than 0.005mm , it starts to get real expensive and takes time for all sorts of reasons. But mostly because of the materials stability and the temperature it is being processed at.Neil
Cameras have a hard time focussing on a cutter that is less than a pixel across! Wow.
A most interesting experiment, Dave! I know that fluid logic stuff can be very tiny but that's just pushing the edges of mechanical machining right to the extreme!Maybe get an electric pump for the oil? Pete