On Friday 07 September 2018 20:31:27 Gene Heskett wrote: The offset I may have found. I was using position-cmd to drive x, maybe s/b motor-pos-cmd. Now homes to 0.000 I've put a limit3 between Z and lincurve.in wih a maxa of 3 & a smooth-step of 10 and its nice to feel x stepping in and out according to the z position. It plays with the +- sign in front of the X dro though.
Now to see if its possible to use an X HOME_OFFSET. HOME and HOME_OFFSET could stand an improvement in the Docs. IMO HOME_OFFSET should represent the switches location from the centerline of the lathe which s/b around +5.5 theoretically although in this case the toolpost would need to be re-adjusted to reach the maximum of 5.5" radius as when set to that, and driven inward, the slot in the carriage becomes exposed behind the toolpost holder, allowing wayward swarf access to the ball screw. That whole area of the carriage has been sealed up to protect the ball screw from air hose driven flying swarf although I did design the the nut holder with swarf wipers, something I should redo on TLM. With the offcentered design of the replacement compound/toolpost holder, I can adjust the real position of a cutting tool by at least 3". Since its a lathe, and touch-offs are used to match the real diameter to the DRO, thats a grand "mox nix" anyway. But not being able to setup the points and corrections with the hal_show_config is still a major PITA. Being able to setp those values of the lincurve would let me move along, using a setp to adjust it for zero on a dial as it moves along my slightly crooked, therefore rotating slowly, calibration rod, is the pita as the only way to do it is edit the hal file, and re-run lcnc going thru all the homing etc to get back to the position being worked on. To add fuzz to it, changing the z motion direction appears to cause about a .0026" offset in x according to the dial. Tests that I've done don't appear to be related to the possibility of my home made way wipers lifting the carriage, but I suppose its possible. The other, and highly probable cause would be the vway groove of the carriage is worn bell shaped. Fixing that now would be a major teardown. But I'd do it if I could confirm that IS the problem. :( With this puppy being close to 70 yo, most anything is possible. The command line in the hal-show-config doesn't apply a setp, and the failure disables/freezes it until restarted again. Which is making the application of the bed wear settings very very very time consuming. Is this one of the effects of a pi's (only 1GB) low main memory? Or has a bug found its way into master? Thanks to any and all commentators. -- 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-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
