A few drops of shellack are perfect as well. Being alcohol soluble the shellack is easy to clean up. Even with the generous shot of Kentucky Burbon... Mill responsibly! Rainer
On Fri, May 15, 2009 at 1:22 AM, Rob Jansen <r...@myvoice.nl> wrote: > Gene, Gary, > > I use double sided tape a lot for milling EPS/XPS foam and sometimes for > PCB milling. > There is a problem with the tape wrapping around the mill when you mill > through the tape, not that much of a problem for PCB material with a > spade mill but it could be a problem with one of those combined > engraver/drill bits for PCBs. Surely tape is a problem with foam, the > tape will stick on the sharp edges and influence the quality of the cut. > > A vacuum table is the better solution and easy to make yourself. > Although I don't like Andrew's design (it does not allow you to use > smaller PCB material) it is nicely made. > Check out this link > http://www.cnczone.com/forums/showthread.php?t=33585&page=2 > <http://www.cnczone.com/forums/showthread.php?t=33585&page=2> in the > cnczone, it shows photo's of a home made grid type vacuum table. Nice > thing on the grid type is that you can use a silicone or rubber band to > create a smaller vacuum area. > Made out of PVC it is not expensive, not too heavy and very forgiving in > case you drill or mill too deep. > > And yes, you do need a vacuum pump and the litter wonder that Gene has > is a very nice humming pump. Most membrame type of compressor like used > in a refrigerator are also a nice, they don't make as much noise as my > vane pump (mostly being used to vacumize large 70" x 20" carbon forming > molds). > When buying a vacuum pump, be sure it is suited for this kind of > continuous high vacuum load. Under load the motor may become hot and > even a smaller pump may need a cooling fan to guarantee long life. > > Regards, > > Rob > > > Gene Heskett wrote: >> On Thursday 14 May 2009, Gary Fiber wrote: > >>> I think some use double sided tape to stick down PC boards. I read on >>> someone's site he used Scotch 667 double sided tape so I got a roll >>> and will try it. Others use carpet tape. >>> >> >> I may give that a shot. Obviously clean the table off with alky first so the >> tape will stick. :) >> >> >>> Others use vacuum clamps. Have a look at http://www.drewtronics.net/ >>> >> >> Neat, and wonder of wonders, I actually have one of those little pumps! >> Hummmm... >> >> > > ------------------------------------------------------------------------------ > Crystal Reports - New Free Runtime and 30 Day Trial > Check out the new simplified licensing option that enables > unlimited royalty-free distribution of the report engine > for externally facing server and web deployment. > http://p.sf.net/sfu/businessobjects > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- _________________________________ Rainer M. Schmidt Complex Consulting LLC b...@complexllc.com VoIP (646)-233-1002 FAX (646)-435-9216 ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
