On Tuesday 18 November 2014 07:26:34 Mark Wendt did opine And Gene did reply: > On Tue, Nov 18, 2014 at 7:20 AM, andy pugh <[email protected]> wrote: > > On 18 November 2014 12:12, Gene Heskett <[email protected]> wrote: > > > No mention now > > > of a maximum number of setpoints, IIRC it was 16 previously. > > > Sufficient for me, with a 12 to 13" table travel, but Marks > > > machine is obviously 3 > > > > or > > > > > 4x longer if he is to do a correction every inch. > > > > http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=src/hal/compon > > ents/lincurve.comp;h=b4704c910fb2ebbd4f715614bcb98a9e842cc29a;hb=6f96 > > b26bdcae87b7a10294946b8e637a8e59d319 > > > > Is the .comp file, and the maximum is indeed 16. Whether that is > > enough would depend on the shape of the slides. 3 might be enough to > > improve a bow. > > If more are needed, then it is relatively easy to change the "16" > > numbers in the .comp and recompile/install with halcompile. > > > > -- > > atp > > If you can't fix it, you don't own it. > > http://www.ifixit.com/Manifesto > > Ah, then, I guess it may or may not work for me. My table is 55" long, > and my G Code is written for a Z station for every inch of X station. > Back to the probekins I guess.
Reread Andy's comment about editing the 16 and recompiling. > > As a side note, where exactly is the "table" stored? When I used it for spindle speed non-linearity corrections it was all one BIG table of values applied by setp, contained in the .hal file. I do not know if the hal engine can do a bashism to source a file, but if it could do a ". ycorrect.hal" where all this was pulled in from a separate file thats easier to maintain than a 400 line .hal file, that to me would be a definite plus. But I have seen exactly zero reference to such a handy function in the hal docs. I guess the real question here is: do you have anything that looks like a step function, or, since it does interpolate, do you really need the inch by inch, or would an every 3.5" "bend it trending this way" be sufficient without any recompiling? This same idea could enhance the accuracy of my lathe too. :) 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
