Retrofitting a 1986 Maho MH400E

RotarySMP wrote: I'll spare you the photos.

THANK GOD! Having dropped heavy stuff on my toes more than a few times, it is NOT fun! Hope it all heals well!
(Seems like your sense of humor survived, too!)

Jon

HI, just saw the post, I’m very sorry for your accident. I wish you to have good recovery.

Thanks guys. I did print out the missing brackets for the Heidenhain EXE mounting. Another think I can do with the foot up is start designing the pendant in CAD, and then print a prototype.

Sitting around is driving me nuts, but walking aggrevates the stitches pretty fast.

I pulled the controller board back out,

so I can set it up in my room and at least work on the HAL, Ini and Ladder files while I have my foot up.

Also got the EXE board mounted with its 3D printed blocks.


I was curious whether the output cable of the Heidenhain EXE carriers the differential signals, and the Phillips just didn't use them, or whether they were not output. I have no great hope of finding an old 1980's wiring diagram from the version of EXE MAHO used, so I am doing a dangerous assumption here. The product brochure of the more modern EXE gives the wiring colours, and I assume that a company like Heidenhain doesn't change them. The colors match up with the MAHO wiring diagrams.


There were only five wires connected from the EXE to the phillips. A, B, Index, 0v and +5V. There are seven wires in the cable. What I find a bit weird is that the two unused signals would be two different systems.
- the unused Blue - test connection sensor voltage +
- the unused Green - B inverted.
I could see them either bring both test signals out, or both differential invertwed channels out. Maybe I am overthinking this. If I find I have noise issues, I can still try making new cables back to the EXE board, and bring out the differential inverted signals.

Mark

I am just working through this thread...
forum.linuxcnc.org/27-driver-boards/3045...i25-7i77-first-steps

Thanks again to Andy Pugh for excellent clear support threads.
Mark

If there were differential signals, where is /Z ?