On Tuesday 18 November 2014 06:53:47 Mark Wendt did opine And Gene did reply: > On Tue, Nov 18, 2014 at 6:47 AM, Gene Heskett <[email protected]> wrote: > > 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 Lط¤ظ¾cis > > > <[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 > > Gene, > > The probekins routine that Viesturs pointed out (I did a little bit of > reading on that this morning) might just work for you. It does require > a probe mapping of the area you want to cover, and does some magical > 3D stuff (through the use of matplotlib and stl files). > > I've also seen a pcb probe program which maps out the top of a PCB and > makes corrections to the G Code file to do similar work, but that's > using the G Code to do the work, rather than actually mapping an X/Y > axis height versus the Z axis height. > > I need to do some reading to determine a course of action. Andy posted > a couple of links I haven't had a chance to get to yet, which may be > the simplest solution yet. > > Mark
It probably is, but it bothers me that the maximum number of setpoints is not now specified, nor does it say anything about between points interpolation. The old man page did state all that. So Andy, is this the same code, or a simplified and now faster version? 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
