> From: [email protected]
> To: [email protected]
> Date: Thu, 13 Dec 2012 20:58:11 +0100
> Subject: Re: [Emc-users] linear scales Heidenhain
>
>
> Hello Andy,
>
> Thanks for your reply. I will look for the other Mesa cards and try to
> discover the differences..
> i will keep un touch
>
> Regards
> j^p
>
>
>
>
>
>
>
> > From: [email protected]
> > Date: Thu, 13 Dec 2012 18:13:53 +0000
> > To: [email protected]
> > Subject: Re: [Emc-users] linear scales Heidenhain
> >
> > On 13 December 2012 17:39, jean-paul coninx <[email protected]> wrote:
> >
> > > I am an owner from a maho mhc 700c with a heidenhain tnc 135 controller.
> > > The controller doesn t work any more.
> > > I have read something about retrofitting. The most people use the Mesa
> > > cards in combination with Linuxcnc. For already a few years (no time like
> > > everyone) I a bought a Heidenhain EXE 935 convertor ( 3 axis from sinus
> > > wave to ttl signal) . The moment I bought these EXE 935 the Mesa 7i49
> > > didnt exist . In my opinion I have two options :
> > >
> > >
> > > Mesa 5i20 + Exe 935 + 7i33 and 2 x 7i37TA
> > > Mesa 5i20 + 7i49 + 2 x 737TA
> >
> >
> > Do you know for sure that the 7i49 works with the Heidenhain scales?
> > I can imagine that it might, but it is really intended for use with
> > Resolvers.
> >
> > I know of someone using Heidenhain scales and the EXE convertors and
> > he is measuring to very high resolution (I think he is managing 10nm
> > resolution and 200nm positioning).
> >
> > It is possible that the FPGA on the 5i20 is too small for the 7i49
> > firmware. The 5i23 is not a lot more expensive and has a bigger FPGA.
> > I still had to sacrifice one of the encoder counters on my (admittedly
> > unusual) 7i49/7i44/7i39 firmware on the 5i23. Things would be rather
> > tighter on the 5i20.
> >
> > The 7i25 / 7i77 combination might be worth a look, as might the Pico
> > PPMC setup, which is possibly a little more turnkey.
> >
> > --
> > atp
> > If you can't fix it, you don't own it.
> > http://www.ifixit.com/Manifesto
> >
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