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Richard Erlacher
02/27/09 14:29
  02/27/09 14:29

Read: 671 times
Denver, Co

#162938 - dull tools
Responding to: Joseph Hebert's previous message
I appreciate your comments, Joe.

Not many of the 8052.COM participants will have opportunity to work with the LPKF machines, because, as you've said, they're very expensive.

I've resigned myself to not meddling in this particular person's efforts unless specifically asked, because, (A) he generally ignores unsolicited advice, (B) he often ignores solicited advice, and (C) he tends to blame the tools rather than examining his own practices. If he inquires, I'll pass your comments along, however. I suspect, though, that, with his limited experience with machine tools, he believes that cutting tools remain sharp as long as his scissors bought back in '70 or so have done. Tools rotating at 50-100k rpm and routing through PCB and copper don't last that long. I also disagree with his general practice of "faster is better" which doesn't apply equally to all things. I initially guessed his breakage was due to too high a feed rate for the material involved. Perhaps his penetration was too deep.

I had the sense that he was using small-diameter end-mills rather than V mills. I once had to operate with such small (10-mil) tools in a high-speed vertical milling machine. I can't imagine those lasting long. I certainly broke a few, and they're not cheap.

In any case, I'm not likely to have to deal with this, but one never knows!


List of 25 messages in thread
PCB prototype        Joseph Hebert      02/25/09 11:23      
   How does the LPKF machine do as a drill?      Richard Erlacher      02/25/09 16:09      
      tool life      Joseph Hebert      02/25/09 20:33      
         Well, I just guessed ...      Richard Erlacher      02/26/09 10:15      
            Expensive Drill      Joseph Hebert      02/26/09 10:30      
               Indeed! But useless for anything else.      Richard Erlacher      02/26/09 16:10      
                  Expensive? Yes. Useless? ...      Joseph Hebert      02/27/09 09:49      
                     True enough!      Richard Erlacher      02/27/09 10:00      
                        Dull Tools      Joseph Hebert      02/27/09 14:07      
                           dull tools      Richard Erlacher      02/27/09 14:29      
                              10 mil end mills      Joseph Hebert      02/27/09 14:53      
                                 Wet ?      Steve M. Taylor      03/01/09 15:34      
                                    Air cooled only      Joseph Hebert      03/01/09 15:57      
   Plating??      Chris Bertrand      02/25/09 20:54      
      plating      Joseph Hebert      02/26/09 07:42      
         I figured as such      Chris Bertrand      02/26/09 07:48      
   very good quality      JecksonS Ben      02/26/09 00:19      
   Impressive but..      Oliver Sedlacek      02/26/09 01:32      
      Prototyping prices      Joseph Hebert      02/26/09 08:07      
         Very interesting approach      Dave Brooks      02/28/09 13:43      
            PCBExpress      Joseph Hebert      02/28/09 21:41      
               Sunstone Circuits      Michael Karas      02/28/09 23:56      
                  Sunstone      Joseph Hebert      03/01/09 16:16      
                  P.S. Welcome back      Joseph Hebert      03/02/09 09:39      
               Now-a-days...      Dave Brooks      03/02/09 13:41      

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