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 ------------------------------------------------------------------------------ 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
