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
> >
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>
>
> --
> dos centavos
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