On 24 May 2016, at 17:22, BRIAN GLACKIN wrote: > I concur with Nicklaus. This looks like normal wood grain (each year ring > having a harder and softer section) with the exception of the near center > of view. In this case it looks like the grain was compressed near a > branch/knot. This is all mute it that is not a piece of wood. > > On Tuesday, May 24, 2016, Nicklas Karlsson <nicklas.karlsso...@gmail.com> > wrote: > >> I can see the figure but are nor sure I could see the tool marks. Is the >> wood dry? Are you feeding to fast? >> >> On Tue, 24 May 2016 10:14:17 -0400 (EDT) >> "Todd Zuercher" <zuerc...@embarqmail.com >> <javascript:;>> wrote: >> >>> Anyone know the root cause of tool marks like this? Or better yet how to >> prevent them? The lines are not in a straight line or consistent angle, in >> fact there are places on this piece where they wave up and down. >>> >>> The tool is a 1/4inch solid carbide down spiral, cutting at 200ipm >> turning 17,000rpm cutting 1/2" MDF
So if it's MDF, it can't be grain patterns. I think its simply vibration. Can you use a cutter with a much greater diameter (say 1inch or more)? That would at least reduce the frequency of the vibrations, and the amplitude. Can you take cuts less deep? That would reduce the stress on the cutter. Marcus >> in a single pass. In the picture you can >> see about a half inch long section of the cut where the cut is nice and >> smooth, this is where the ramp in point is (start of the cut). The machine >> is a very large (5ftx10ft) moving table fixed bridge commercial router >> (Komo) with a 14KW spindle and HSK63F tooling. >>> >>> It does kind of give the piece a sort of simulated wood grain look. I've >> playing with the amount of tool sticking out of the collet can make it >> better or worse, finding the sweet spot is a bit of trial and error, and >> 0.050 can make a big difference. You can hear the difference in the sound >> when you get it right, the cut is very quiet. If it gets bad enough the >> tool will snap. Also playing with the RPM can somtimes make it better. >>> >>> It is hard to believe that a carbide tool or collet could flex that >> much, but something sure seems to be vibrating. >>> -- >>> >>> ======================================== >>> >>> Todd Zuercher >>> mailto:zuerc...@embarqmail.com <javascript:;> >>> >>> ======================================== >> >> >> ------------------------------------------------------------------------------ >> Mobile security can be enabling, not merely restricting. Employees who >> bring their own devices (BYOD) to work are irked by the imposition of MDM >> restrictions. Mobile Device Manager Plus allows you to control only the >> apps on BYO-devices by containerizing them, leaving personal data >> untouched! >> https://ad.doubleclick.net/ddm/clk/304595813;131938128;j >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net <javascript:;> >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > ------------------------------------------------------------------------------ > Mobile security can be enabling, not merely restricting. Employees who > bring their own devices (BYOD) to work are irked by the imposition of MDM > restrictions. Mobile Device Manager Plus allows you to control only the > apps on BYO-devices by containerizing them, leaving personal data untouched! > https://ad.doubleclick.net/ddm/clk/304595813;131938128;j > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Mobile security can be enabling, not merely restricting. Employees who bring their own devices (BYOD) to work are irked by the imposition of MDM restrictions. Mobile Device Manager Plus allows you to control only the apps on BYO-devices by containerizing them, leaving personal data untouched! https://ad.doubleclick.net/ddm/clk/304595813;131938128;j _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
