I don't know either, but I would think the black stuff would block almost 100%, esp at low power levels - it's very high-density. What thickness are you thinking?
DougM On Tue, Feb 14, 2012 at 6:23 PM, gene heskett <ghesk...@wdtv.com> wrote: > On Tuesday, February 14, 2012 09:22:10 PM doug metzler did opine: > >> Make sure you're wearing full breathing apparatus if you mill PCB >> material. >> >> I was thinking along similar lines - why not Delrin or some other >> appropriate plastic? >> >> DougM >> > How opaque to the IR is delrin? I have no clue without googling it. > >> On Tue, Feb 14, 2012 at 5:39 PM, Erik Christiansen >> >> <dva...@internode.on.net> wrote: >> > On 14.02.12 15:20, gene heskett wrote: >> >> The encoder wheel >> >> itself will be trapped between the spindle bearing lock buts. >> > >> > Gene, have you considered using a piece of thin PCB material for the >> > encoder wheel, since all your sheet Al is toffee? A piece of the brown >> > phenolic stuff would be easier on the tool. Copper is needed on at >> > least one side, if the green fibreglass board is used, because it lets >> > too much light through. (About 34 years ago I was cautious enough to >> > check a piece before making a wheel, and switched to PVC sheet. But >> > I had more room, for a thicker wheel, than you do.) >> > >> > Erik >> > >> > -- >> > A man with one watch knows what time it is. >> > A man with two watches is never quite sure. >> > >> > >> > ---------------------------------------------------------------------- >> > -------- Virtualization & Cloud Management Using Capacity Planning >> > Cloud computing makes use of virtualization - but cloud computing >> > also focuses on allowing computing to be delivered as a service. >> > http://www.accelacomm.com/jaw/sfnl/114/51521223/ >> > _______________________________________________ >> > Emc-users mailing list >> > Emc-users@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/emc-users >> >> ------------------------------------------------------------------------ >> ------ Virtualization & Cloud Management Using Capacity Planning >> Cloud computing makes use of virtualization - but cloud computing >> also focuses on allowing computing to be delivered as a service. >> http://www.accelacomm.com/jaw/sfnl/114/51521223/ >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > Cheers, Gene > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > My web page: <http://coyoteden.dyndns-free.com:85/gene> > The inherent vice of capitalism is the unequal sharing of blessings; > the inherent virtue of socialism is the equal sharing of misery. > -- Churchill > > ------------------------------------------------------------------------------ > Virtualization & Cloud Management Using Capacity Planning > Cloud computing makes use of virtualization - but cloud computing > also focuses on allowing computing to be delivered as a service. > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
