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  1. psychomill

    cutting taps

    Small taps may be in the range of 3-6D, larger (say 3/8 or so and up) may be at 2-4D. As others have said though, this not set in stone. This will change with different makes, type styles etc. 1-1/2D shouldn't be a problem at any size (unless you're tapping a 2" thread - then its a HP issue).
  2. psychomill

    "Normal" CNC mill and CNC lathe tolerances in aluminum

    pceller, the "general" consesus for "standard" tolerance would be this... .X = .03 .XX = .01 .XXX = .005 Finish = 63 Angle = 1 deg But keep in mind, none of this is set in stone. I agree with Scott (RRBD) though, tolerance the part as according to your needs. Don't try to "cheat" the price...
  3. psychomill

    What PC program to use for loading programs to CNC.

    You download many for free use, or even for a trial period. This one is free: http://www.cadem.com/ncnet/freednc.htm Or for trial: http://www.multi-dnc.com/index2b.html#myAnchor Predator is also slick..... Google it,.... there's a lot of free trials and freebies out there...
  4. psychomill

    CNC Memory capacity

    How many tool/offsets do you use in a single program? If you have 64 capable, can you make each program use a different offset? As Bill said though, if you actually change the tooling, the offsetting is negated anyway. Also, in your programming, are you programming from centerline with comp...
  5. psychomill

    CNC Memory capacity

    Depending on the age of the machine, that could be difficult. What control (and version or model of control) it on it? Depending on this, you may have some other capabilities on it that you may not be aware of. Also, if the parts are a similar, you could do this as macro programming save...
  6. psychomill

    Biggest Machining Mistakes

    Ahhhm, gundrills. One comes to mind... Some winters ago, working at a shop in Denver, I was moving a part from one machine to another on a HMC cell center. The tool matrix were all virtually the same with a few exceptions. Well, the program called for a 1/2 em which spun at 14k, the magazine...
  7. psychomill

    CNC positional tolerances

    Quote: Don't you realize that it's the pattern-locating tolerances that are so sensitive to the variables you mentioned? Got news for you, feature tolerances are also affected by many of those variables as well, not just location or positioning. Quote: Also, by Y14.5M-1994, dimensions and...
  8. psychomill

    CNC positional tolerances

    Tunalover, To get back to your initial question, "... "typical" high-probability positional tolerances for CNC...". As you already answered for yourself, it's "broad", the question and the answer. Can a CNC machine (mills and lathes and such) hold tenths? Yes, and even better under the right...
  9. psychomill

    fanuc control all clear function for tool lengths 11m to 16m

    Hello, first time posting here but have been watching... Quote: O1 M00(RESET ALL OFFSETS TO 0?) #100=1 WHILE[#100LT100]DO1 (note: this resets numbers 1-99, if you have more or less, change this value) G10G90P#100R0 #100=#100+1 END1 M30 This macro would work except you'll need an "L"...
  10. psychomill

    fanuc control all clear function for tool lengths 11m to 16m

    Hello, first time posting here but have been watching... Quote: O1 M00(RESET ALL OFFSETS TO 0?) #100=1 WHILE[#100LT100]DO1 (note: this resets numbers 1-99, if you have more or less, change this value) G10G90P#100R0 #100=#100+1 END1 M30 This macro would work except you'll need an "L"...

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