On Friday 02 December 2016 18:15:19 Gene Heskett wrote: > Greetings all; > > Hooking up the encoder so I could use it to calibrate speeds obtained, > I am puzzled as can be. But let me put that pix up on my web page > first. Got it, could be sharper but will do. > > Append "/lathe-stf/Encoder-installed.JPG" to the link in the sig. > > The curved alu piece as you can see has 3 trenches carved across the > inside face, on a curve radius that matches the bull gear. > > And as you can see, looking at the top 2, one is dead centered over a > tooth, and the next one ccw from the top, is dead centered over a > valley between the teeth. > > The index I had to fool with as it was seeing not only its > special "tooth" but all the other teeth too, so I had to break its > glue, slide it to the left a couple mm's at which point it quit seeing > anything but my screwdriver going by. Had to make a new special > tooth, bigger & set a little proud of the bull gear teeth. > > Getting all that fixed, I put a hal meter on the velocity pin and got > pure noise turning the chuck with a crescent wrench on a jaw. Hooked > up the halscope, finding the a/b outputs are almost perfectly > complementing each other. No quadrature at all. Those are ATS-667's > you can see, body end in the top two slots, lead end as the index one > is reversed in the mount, and sitting about 3/8" out into the other > block of alu holding up the pcb so I can attach the cable to it. > > Given the mechanical quadrature spacing you can see, what the heck is > going on? I am thinking maybe I need to remake the alu holder out of > iron/steel to make the iron in the mount shield them from each other > better? > > What can the rest of you see that I did wrong? > > Thanks everybody. > > Cheers, Gene Heskett
Dumbassed old man!, of course they are nearly symetrical and out of phase, I used a spacing that is the exact opposite. I didn't need a half tooth, but a quarter tooth. I don't believe I can fix this one, and the bolt you can see mounting it is half stripped anyway. Needed a longer one which I have since sourced IIRC. I've gotta learn how to use a calculator I guess. Again. Damn... 60 teeth, tip radius 3". Circumference is pi*d etc etc So move the top side of the top one 0.078539816339744831" higher & fix that ATS-667 against that side of the slot. Right? Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
