You may be able to use the existing kinematics as a guide. You will need kinematics to compensate for tool length. You can find examples at linuxcnc.org. Dimension values in the kinematics files need to match the machine to compensate for pivot length or any geometric errors you have in the construction of the machine.
Once you understand what the tool length compensation does you will be able to understand what the machine kinematics file will need. Do not overcomplicate it. If you understand geometry and trig you should understand the kinematics calculations. On Tue, Dec 4, 2012 at 12:26 PM, alexandru dumitru <[email protected]>wrote: > > Thanks for you answer Stuart! I generate my G-code with a generic fanuc 5 > axis post proccesor and it doesn't compensate the tool lenght or the B axis > pivot point, so i need to incorporate the kinematics in the machine > control. I'm not that good with linux and i do not know how to do all this > things. I was looking into linuxcnc machine examples and one machine from > vismach it's almost same configuration like mine! do you think that will > work for me? Alex > > Date: Tue, 4 Dec 2012 11:36:40 -0600 > > From: [email protected] > > To: [email protected] > > Subject: Re: [Emc-users] 5 axis kinematics! > > > > The kinematics may not be wrong. It depends on what the gcode is telling > > the machine to do. > > > > Just saying the kinematics is wrong doesn't lead anyone to be able to > > understand where your problem is. > > > > A simple post processor will generate gcode that needs the kinematics in > > the machine to run a part. > > > > A complex post processor will generate gcode that will run the machine > with > > simple kinematics. > > > > My guess is the kinematics is not in the post processor and the > kinematics > > is not in the machine control software. > > > > If you have the machine axes tuned then a proper gcode program will move > > the machine to cut the part you want. You do not need to use anything > more > > than trivkins to run your 5 axis machine if the kinematics is > incorporated > > in the gcode program by the post processor. > > > > If you want to be able to program complex parts my hand then you will > need > > complex kinematics in the machine control. > > > > My cinci 5 axis machine runs the post processed gcode with trivkins. The > > machine has some geometry errors I corrected with a kinematics. I had a > > choice of putting the geometry compensation values in the post processor > or > > in the machine control kinematics. I chose to put the compensation in the > > machine control kinematics. > > > > Hope this helps you decide where you apply the machine kinematics - in > the > > post processor or the control software. > > > > Stuart > > > > > > On Tue, Dec 4, 2012 at 10:28 AM, alexandru dumitru <[email protected] > >wrote: > > > > > > > > > > > > > > > > > Hello! I am building an 5 axis milling machine similar to this one ( > > > http://www.youtube.com/watch?v=R1DCXe9t3UE ) the only diference is > that > > > my machine has the rotary table fixed on the milling table and the > other > > > axes are configured like this ( B axis is the tilting head that is > carryed > > > by the Y axis, the Y axis is carryed by Z axis and the Z axis is > carryed by > > > X axis), so the C axis is fixed to the machine while the X axis > carryes all > > > the other axes. My problem is that i don't know how to configure the > > > kinematics module in EMC2. I configured all my 5 stepper motors , the > > > machine runs but the kinematics are wrong! Is there anyone that cand > help > > > me with this problem? Alex > > > > > > > ------------------------------------------------------------------------------ > > > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > > > Remotely access PCs and mobile devices and provide instant support > > > Improve your efficiency, and focus on delivering more value-add > services > > > Discover what IT Professionals Know. Rescue delivers > > > http://p.sf.net/sfu/logmein_12329d2d > > > _______________________________________________ > > > Emc-users mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > > > > -- > > dos centavos > > > ------------------------------------------------------------------------------ > > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > > Remotely access PCs and mobile devices and provide instant support > > Improve your efficiency, and focus on delivering more value-add services > > Discover what IT Professionals Know. Rescue delivers > > http://p.sf.net/sfu/logmein_12329d2d > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > Remotely access PCs and mobile devices and provide instant support > Improve your efficiency, and focus on delivering more value-add services > Discover what IT Professionals Know. Rescue delivers > http://p.sf.net/sfu/logmein_12329d2d > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- dos centavos ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
