if you can work in 35mm space, make a large laser print of the wheel, photograph it a few stops under exposed, over develop it, and cut the finished disk out of the negative. works for crude diffractive lenses too.
--- On Sat, 2/25/12, Lars Andersson <l...@larsandersson.com> wrote: > From: Lars Andersson <l...@larsandersson.com> > Subject: Re: [Emc-users] Film Emulsion for Encoder Wheels? > To: "'Enhanced Machine Controller (EMC)'" <emc-users@lists.sourceforge.net> > Date: Saturday, February 25, 2012, 7:14 AM > Aah, wet process photography! > > What you might do is to get some gelatin emulsion lito film > sheet at big > enough size and put into warm water. The emulsion will slide > off the film > and you can transfer it to the glass where it will stick. > Lito is good > because you can work in pretty bright red LED light. With > pan film you must > work in total darkness and this may tax your patience. The > whole job is done > in a tray under water. > > // Lars > > > -----Original Message----- > > From: Kirk Wallace [mailto:kwall...@wallacecompany.com] > > Sent: den 25 februari 2012 08:17 > > To: LinuxCNC Users List > > Subject: [Emc-users] Film Emulsion for Encoder Wheels? > > > > I wonder if one could make an encoder wheel with a thin > glass disk, > > coat it with a film emulsion, expose it to an image of > an encoder > > wheel, and develop it like regular film? > > > > Or, use a thin sheet metal disk with photoresist and > etch the slots? > > > ------------------------------------------------------------------------------ > 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
