On Wednesday 08 November 2017 22:46:40 Jon Elson wrote: > On 11/08/2017 04:44 PM, Gene Heskett wrote: > > On Wednesday 08 November 2017 11:51:37 Jon Elson wrote: > > > > Well, I would not use slot-type sensors for an encoder. > > There are sensors specifically made for encoder use. > > URL? > > Mostly, HEDS and US Digital clones. But, anyway, something > that has a narrow slit on either the emitter or sensor side > (maybe both) not just the full width of the LED and > photodiode parts. You can squint down the sensor slot to > see if they have the slit. I think most of these commodity > parts do NOT have the slit molded into the plastic. > > Jon > These do, but more for ambient light entry control, they are most of 1/16" wide, not exactly pin point for sure.
I tried to make an automatic powder weigher out of a good O-haus scale, but found even bare parts were still too small a target, and switched the p-cell on and off way to fast to make it work good. Best I could do was stop the stepper driving the dribble tube while the scale beam was still 3/16" low, and it would then coast thru the magnetic damper field to arrive at a .05Gr tolerance. So I threw money, almost $300 at a Hornady Lock & Load auto-dispenser scale, which turned out to have a huge thermal drift the first hour it was on, an even bigger problem with static electricity in the pan cover, which should be in place for protecting the pan from passing breezes, attracting the pan a grain or more, making charges too heavy until I wiped it down with moly barrel grease, and was slower than weighting by hand using the O-haus scale. But I'm getting used to it, so I'll keep it till one of us dies. I am not wearing out a barrel every 10 years like I was, so the 6.5 Creedmore I just used the Sheldon to make it fit, will quite likely be the last barrel I'll put in old meat in the pot. 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
