notice the command "setp" in the kinematics file that is a default value
while LinuxCNc is running you can issue a "setp" with a command line to help you determine what the value should be happy the information is helpful Stuart On Sun, May 9, 2021 at 8:45 AM Juergen Gnoss <[email protected]> wrote: > Sorry Stuart for not responding earlier. > Yes, I already downloaded it. Thanks for that, it helped a lot. > > It took me some time, but It's much clearer now. > I'm a type of guy like JT, I've to fully understand the stuff behind the > scenes before I start to cook. Copy, trial and error is not my thing. > So I took the cincikins_good_24JUN2009.c kinematics file from your .tgz > and started to tweak it in order to fit my 3 axis gantry + B axis. > > Not there yet, but as I said, I learn as I go, at the moment I'm exploring > how that parameter back and forth (the implementation of it) > between linuxcnc and a component works. > Later today I'll go into the kinematics stuff. That part will be straight > forward, I think, because I already understand that part of the code in > cincikins_good_24JUN2009.c. > > so again, thanks a lot Stuart > I keep you updated on the progress. > > Ju > > > ________________________________ > From: [email protected] < > [email protected]> > Sent: Sunday, May 9, 2021 8:27 AM > To: [email protected] < > [email protected]> > Subject: Emc-developers Digest, Vol 181, Issue 9 > > Send Emc-developers mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.sourceforge.net/lists/listinfo/emc-developers > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Emc-developers digest..." > > > Today's Topics: > > 1. Re: 4th axis pivot point question (Stuart Stevenson) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 8 May 2021 16:45:33 -0500 > From: Stuart Stevenson <[email protected]> > To: EMC developers <[email protected]> > Subject: Re: [Emc-developers] 4th axis pivot point question > Message-ID: > < > cahf93hr07jh-cqlfmxgim3tg-zinnl8vqupjy7zuxpqgkqr...@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > the link expires 5/16/2021 > > On Sat, May 8, 2021 at 4:43 PM Stuart Stevenson <[email protected]> wrote: > > > Juergen, > > > > This link will give you the EMC2 files used to run the 5 axis cinci with > > TLO and Pivot Length offsets. The machine has an A axis carried by the B > > axis and both ride on the Z axis. I hope this will help you. > > > > https://www.dropbox.com/s/n3qnegnk52ke1gj/emc2-stuart.tgz?dl=0 > > > > thanks > > Stuart > > > > > > > > On Sat, May 8, 2021 at 8:56 AM Juergen Gnoss <[email protected]> wrote: > > > >> Thanks Stuart, > >> > >> right now, that sounds like villages in the desert to me, but I'll go > >> into it. > >> > >> me ... going to dive into lcnc documentation > >> > >> thanks Ju > >> > >> > >> ________________________________ > >> From: [email protected] < > >> [email protected]> > >> Sent: Saturday, May 8, 2021 8:19 AM > >> To: [email protected] < > >> [email protected]> > >> Subject: Emc-developers Digest, Vol 181, Issue 7 > >> > >> Send Emc-developers mailing list submissions to > >> [email protected] > >> > >> To subscribe or unsubscribe via the World Wide Web, visit > >> https://lists.sourceforge.net/lists/listinfo/emc-developers > >> or, via email, send a message with subject or body 'help' to > >> [email protected] > >> > >> You can reach the person managing the list at > >> [email protected] > >> > >> When replying, please edit your Subject line so it is more specific > >> than "Re: Contents of Emc-developers digest..." > >> > >> > >> Today's Topics: > >> > >> 1. Re: 4th axis pivot point question (Stuart Stevenson) > >> > >> > >> ---------------------------------------------------------------------- > >> > >> Message: 1 > >> Date: Fri, 7 May 2021 21:52:42 -0500 > >> From: Stuart Stevenson <[email protected]> > >> To: EMC developers <[email protected]> > >> Subject: Re: [Emc-developers] 4th axis pivot point question > >> Message-ID: > >> < > >> cahf93hrpamdpb19judkm6-17mfvverxpgfw9cvpcg07wp8e...@mail.gmail.com> > >> Content-Type: text/plain; charset="UTF-8" > >> > >> Juergen, > >> Are you talking about the display on the AXIS preview or are you talking > >> about machine motion? > >> > >> If you are talking about the display on the screen I don't have much > >> experience with that. > >> > >> If you are talking about machine motion then - > >> You can modify your kinematics file to include a pivot length distance > on > >> the y axis/joint position to adjust for the pivot length you determine. > >> sin > >> B axis value times pivot length and cos B axis value times pivot length > >> also > >> You can modify your kinematics file to include a tool length from the > tool > >> table to adjust the y axis/joint position for the tool length. sin B > axis > >> value times tool length and cos B axis value times tool length > >> also > >> You can modify the kinematics and hal files to create a variable to be > >> read > >> from a hal file to allow you to adjust the pivot length value. > >> You will also need to pass the tool length value into the kinematics > file. > >> > >> You will then have 4 axis pivot and tool length compensation. > >> > >> Ideally, the program would position the XYZ tool tip and have a B axis > >> value. The pivot length value and the tool length MUST add up to the > >> distance from the tool tip to the pivot point. You can arbitrarily > choose > >> where the pivot point is measured from along the spindle/tool axis. Your > >> tool length will have to be measured from the same point along the > spindle > >> tool axis. > >> > >> thanks > >> Stuart > >> > >> On Fri, May 7, 2021 at 5:38 PM andy pugh <[email protected]> wrote: > >> > >> > On Fri, 7 May 2021 at 16:43, Juergen Gnoss <[email protected]> > wrote: > >> > > >> > Pivot point of the B axis is about 100mm above spindle collet. > >> > > > >> > > Do I need to tell LCNC something about that in configuration or hal, > >> or > >> > is > >> > > that handled by tool offset in Z ? > >> > > > >> > > >> > It's not really handled at all. > >> > > >> > The machine will do what the machine does, that is fixed by the > >> mechanics. > >> > > >> > The graphical preview will assume that the B axis is along Y = 0. > >> (because > >> > it has no way to know any better) > >> > > >> > -- > >> > atp > >> > "A motorcycle is a bicycle with a pandemonium attachment and is > designed > >> > for the especial use of mechanical geniuses, daredevils and lunatics." > >> > ? George Fitch, Atlanta Constitution Newspaper, 1912 > >> > > >> > _______________________________________________ > >> > Emc-developers mailing list > >> > [email protected] > >> > https://lists.sourceforge.net/lists/listinfo/emc-developers > >> > > >> > >> > >> -- > >> Addressee is the intended audience. > >> If you are not the addressee then my consent is not given for you to > read > >> this email furthermore it is my wish you would close this without saving > >> or > >> reading, and cease and desist from saving or opening my private > >> correspondence. > >> Thank you for honoring my wish. > >> > >> > >> ------------------------------ > >> > >> > >> > >> ------------------------------ > >> > >> Subject: Digest Footer > >> > >> _______________________________________________ > >> Emc-developers mailing list > >> [email protected] > >> https://lists.sourceforge.net/lists/listinfo/emc-developers > >> > >> > >> ------------------------------ > >> > >> End of Emc-developers Digest, Vol 181, Issue 7 > >> ********************************************** > >> > >> _______________________________________________ > >> Emc-developers mailing list > >> [email protected] > >> https://lists.sourceforge.net/lists/listinfo/emc-developers > >> > > > > > > -- > > Addressee is the intended audience. > > If you are not the addressee then my consent is not given for you to read > > this email furthermore it is my wish you would close this without saving > or > > reading, and cease and desist from saving or opening my private > > correspondence. > > Thank you for honoring my wish. > > > > > > -- > Addressee is the intended audience. > If you are not the addressee then my consent is not given for you to read > this email furthermore it is my wish you would close this without saving or > reading, and cease and desist from saving or opening my private > correspondence. > Thank you for honoring my wish. > > > ------------------------------ > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers > > > ------------------------------ > > End of Emc-developers Digest, Vol 181, Issue 9 > ********************************************** > > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers > -- Addressee is the intended audience. 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