On Tuesday 14 July 2015 07:20:12 Gene Heskett wrote: Thinking out loud...
Encoder mounted, runs, encoder velocity output noisy as hell. As in 40% or more. I'll add it to the halscope trace so I an see if the noise is 1x turn meaning the disk is eccentric, or 2x turn, meaning backlash is fubar. Cyclic noisy, like my toy mills backlash is uneven between axis's. In/out positioning seems extra fussy as well. A 5 thou move adjusts the duty cycle noticably. Like the outer edge slots aren't deep enough. I've room enough in the opto gullets to add 20 thou. My method of adjusting backlash maybe needs rethinking, so before I make another disk by moving the last cutout (which intersects the outer end of the already cut slot in this code) outward 20 thou, and possibly use 68 slots so I don't have to bend the optos sideways so far to get decent quadrature (I have to spread them about 15 thou), I think I'll try a different method. Use a larger test move, say 5 thou, and adjust the backlash setting until I get exactly a 5 thou move. That might result in a more consistent slot width cut. How do the rest of you go about this thing called backlash calibration? Also deepen the final cuts as the last one left some flashing in about a dozen slots I had to cut away with a razor blade due to the brass being warped by the clamping pressure. And I might try some of that double stick tape, if I can find some locally. If I can do the cuts stopping 2 thou above the table, that should get far enough into the tape and reduce the left over fins I'm getting by using a piece of 1/4" 5 ply as sacrificial. It crushes too easily. Has anyone broken a bit because it gets clogged with tape glue so it doesn't toss the cuttings clear? That does seem to be a valid concern with a 1/32" inch mill. I wonder if a couple hours in my Lyman case polisher might remove any leftover fins in the slots that I can't see? That might be worth a shot too. Lots of questions even before I've made the morning coffee. :) 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> ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
