Slotted Optical. Here are larger photos. When I cut the teeth I forgot to change to the 3mm mill so they were cut with a 4mm. Made the gap to tooth wrong but it should still be alright. Look carefully at the larger photos and you can see the index slot. It was done with the 3mm mill.
AlibreCAD/CAM http://www.autoartisans.com/mill/EncoderDisk.jpg Old TEC86 S100 computer front panel about 1/8" aluminium. http://www.autoartisans.com/mill/EncoderDiskCut.jpg By the third tooth I realized the cutter was too big and I'd forgotten to change tools. http://www.autoartisans.com/mill/EncoderTeethCut.jpg Then the center hole. Cut at 02.7. Was supposed to be 2.75. Typo when I did the CAD. http://www.autoartisans.com/mill/EncoderDiskCenterCut.jpg I ended up mounting it in the 4 jaw on the lathe and bringing it out to 2.75" it was a nice slip fit onto the pulley. Here you can clearly see the index slot. http://www.autoartisans.com/mill/MountedEncoderDisk.jpg And that's when I realized I'd forgotten to shave the teeth edge down to 0.0625" because the slot in the sensor is also 0.125". So back on the original between centers tapered arbor I used to make the pulley. http://www.autoartisans.com/mill/Arbour-5.jpg and the final result ready to go back on the mill. http://www.autoartisans.com/mill/ShavedEncoderDisk.jpg For my Gingery Lathe I 3D printed a black disk that turned out to be completely transparent to the sensors so I needed to use metalized paint to make it opaque. I 3D printed the holder for the sensors http://www.autoartisans.com/Lathe/SlottedSensorMount2s.jpg Not sure yet how to mount them for the mill. John > -----Original Message----- > From: Chris Albertson [mailto:[email protected]] > Sent: August-24-20 9:10 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Spindle Speed sensing. > > I had assumed it was magnetic from the looks of the short teeth. > > My question is it there is an index channel. You would need one for > tapping but not for a simple speed sensor > > On Mon, Aug 24, 2020 at 6:59 AM jrmitchellj <[email protected]> wrote: > > > are you going to use HALL sensors with that, or optical? > > > > --J. Ray Mitchell Jr. > > [email protected] > > > > > > > > "Good enough is the enemy of excellence"author unknown > > > > > > On Sat, Aug 22, 2020 at 5:43 PM John Dammeyer <[email protected]> > > wrote: > > > > > Making progress. Now to make a bracket that holds the sensors and > > connect > > > to the second breakout board and MESA 7i92H. That will probably take me > > > another month� > > > > > > John > > > > > > > > > "ELS! Nothing else works as well for your Lathe" > > > Automation Artisans Inc. > > > www dot autoartisans dot com > > > > > > _______________________________________________ > > > Emc-users mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > -- > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
