On Thursday 13 September 2018 09:22:52 Gene Heskett wrote: I got curious, and looked up the mt5 taper, which #27 says is 0.052626 per running inch. So I wrote me a new 25 liner to cut that taper for the 2.4" run of the mt5.
And I set the lincurve up for the corrections I read off the a2 rod that covered the lincurve.0.in range that would entail at a ,2" measuremeant interval. Setting it to take nominally .0002" off at the big end, it did that nice and clean for about an inch, then started skipping part of the diameter as if the taper per inch was wrong. As I didn't want to bury the jig in the spindle, I stopped at the end of the first pass. This leads to 2 questions. #27 doesn't say radius or diameter, so I'm assuming diameter, is that correct? The values I entered for the lincurve-y-val.nn were the values I read from the dro when the dials needle wibbles were an equal amount from zero. Those values are of course RAD, not DIAMETER. And they were all negative from a touchoff point right at the nut of the ER-40 adapter. As much as -0.005, yet the test cut moved away from the work when, according to the contact polishing, I needed to take at least a slightly thicker cut to better match the spindle as the alu mt5 and the spindles mt5 is a tighter fit at the small end. They weren't cut at the same carriage position. Do I have the sign of the y-val-nn offset correction correct? In which case I need to steepen the taper/inch by at least another .0005"/inch, maybe more. When I started this, the mt5 on the jig bottomed in the spindle on the small end according to the contact polish, and a dead blow hammer could knock it back and forth at the spindles mouth about .0043". Very poor fit IOW. There was no correction, didn't know I needed it, when I reground the spindle bore to that -0.052626" taper/inch to correct its wobbles. So all the bed wear artifacts are now imprinted in the spindle bore. Mutter mutter. Once the lasers get here, I can make new measurements, but since these are such tiny corrections, I sure want to make sure the sign of the correction I am applying is good. But I guess I can apply them while the laser is working to check that. ======================== But its still too wet to try and level the water line damage ditch refill in the yard, and thats gonna get a lot wetter from Florence before it gets dry enough to rake smooth. The rain we've had is settling it rapidly. Yellow clay=@#$%^&*)][ language while running a rake or shovel as it sticks to everything. We (and even thats a lost cause) try to grow grass on this crap just so ones shoes don't gain 5 lbs each just walking to the mailbox. I miss the good black loam soil we had in Iowa as a child. -- 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> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
