On Tuesday 18 November 2014 05:52:16 Mark Wendt did opine And Gene did reply: > On Tue, Nov 18, 2014 at 5:42 AM, Viesturs Lؤپcis > <[email protected]> > > wrote: > > 2014-11-18 12:29 GMT+02:00 Mark Wendt <[email protected]>: > > > is there any way with screw mapping that I could "adjust" the Z > > > axis with screw mapping so as it hits each individual "inch" along > > > the X axis? > > > > IMHO something like that might be done with a small "compensation > > table", which takes X position, looks up necessary Z compensation > > amount and then either adds/subtracts it to axis.2.motor-pos.cmd and > > axis.2.motor-pos-fb respectively (just like thc module) for stepper > > machine or it can be added to Z position in [slightly customized] > > kinematics module. > > For Z axis in particular you might want to take a look at probekins > > as well. > > > > Viesturs > > That sounds pretty close to what I was thinking about. > > The CNC saw beveler is a two axis machine, X and Z. It's stepper > based, with two steppers on the X axis, one slaved to the other. I'm > at work and don't have access to the computer that runs the machine. > I have manually "probed" the X axis and have a listing of all the > heights per inch of the X axis (no way to really use a machine probe > under probekins due to the nature of beast). But mapping out Z axis > height for a given X position is definitely what I'm interested in > doing. > > Mark
So would I, Mark. I am not Christan Scientist enough to believe my X table does not sag/rock in the relatively short ways as it moves its CG off center. Which, because the x motor is hanging off the right end, is certainly offset to the right by 4 or 5 inches. The relatively short ways precludes keeping the CG within the available way length travel for quite a bit of the work I've done on it. This would I'd assume, also be a problem with the G0704 & clones. Certainly I can probe it and record it, but what do I do with that data after I have the probe file? I often mount work on the right half of the table so that its working position is better balanced. It would be nice to be able to use the full length of the table and believe the resultant cut is within a couple thou of straight, something I cannot do now with any confidence that its right. 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> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
