On Tuesday 28 February 2017 04:46:58 andy pugh wrote: > On 28 February 2017 at 09:44, andy pugh <[email protected]> wrote: > > Do you really need more than one joint's-worth? Do you intend > > jogging different joints on different scales? > > Also: I never find the 0.1, 0.01. 0.001 (mm) graduations in Touchy to > be a limitation. And, in fact, I almost never use 0.001 after I have > each axis on a round number. 0.1 per click (10mm per rev of the > 100-notch dial) is perfectly OK for moving my machine through it's > full range, and .01 per click is all the resolution i need for making > my parts.
That idea has quite a bit of merit too, and it might be useful to a machinist trained in the trade to have each "click" represent a certain distance. If my way doesn't feel right, then I'll work out a way for pyvcp to just give the operator a multiplier as a jog speed tally, such that the slowest would be 1mm per full turn. That would be .01mm per click. The idea I had to start was that one click=one microstep of the motor for the lowest speed, but on this lathe, I believe being able to turn so many clicks and touch off for a last to size run certainly seems like a tasty target. But on this old beast that may also be overkill. And with my current motor and driver for Z, almost certainly a huge cyclic error on a submicron basis. Ignored because it is so small in the grand view. I think that, as a starting scale factor, should be calculated from that joints "SCALE" setting. Since I'm currently set for a /8 as microstep size on both motors, and the scale is in the 20,000 to 30,000 range per inch ATM, and I wanted a .01mm movement per click as the smallest move, whats the proper divisor of that scale in inches to get that .01mm movement? And is that a fine enough move when excavating a bearing pocket that needs a press fit? Thanks Andy. 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
