On Sat, 2009-06-13 at 08:17 -0700, Lawrence Glaister wrote: > Hi Kirk, > Looks like you have been having fun in gcode. One thing you might want > to consider for an encoder wheel is to make the cutouts the same size as > the solid areas to get as close to a 50% duty cycle on the detector(s) > as possible.
The slots should have a 50% duty. I think the cutter radius compensation is implying otherwise. > You didnt say if you were just using the wheel for a pulse > generator or a 2 channel encoder. You might also consider adding another > hole for an index detector if you need that. Here is my MPG version 1: http://www.wallacecompany.com/machine_shop/Shizuoka/mpg_proto-1a.jpg > Along a similar line, you can check out a lathe spindle encoder I built > a while back. The gcode program can be adjusted to make an encoder of > any number of pulses. If you are using slot source/detectors, you have > to make sure the holes in the disk can be reached. Thanks for the links, I have referred to them often. I can never find the sensor I want with the mounting I like. I'll probably end up gluing mine to a small plate with holes. Why can't sensor designers read my mind. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ 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
