Retrofitting a 1986 Maho MH400E

On a multiplexed kb system there is a matrix of outputs and inputs
so for example a 64 key matrix could have 8 outputs and 8 inputs
with the key switches at the intersections. Typically the 8 outputs are driven
one at a time and the 8 inputs read every time a different output is energized

Again, thank you for the response.

"I decided not to get a 7i83, as I have enough spare inputs on the 7i77" Oh No ! :ohmy: What about the Tool changer ? What about the electronic tool probe/part probe ? What about the "A" and "B" axis? What about the Blinking Lights if the machine chokes on a job ?:laugh:



John --- I bet Mark is just showing us a bare bones proof of concept conversion and holding back what is really going on--:silly:

Lol

LMAO!!! MAHO made some real Rube Goldberg style mechanisms for tool changing didn't they.

A fourth or fifth axis shouldn't need much I/O, if you connect an analog motor driver and encoder to one of the six analog control loops, and then should only need an input pin for an index.

A tool probe is also only a single input pin. I was intending to have a connector on the pendant, and plug a probe into it.

John,
My plan of the MatrixKB in this post...
forum.linuxcnc.org/12-milling/33035-retr...00e?start=310#103928

I finally got the last buttons printed, and could assemble the lower button carriers. Then continued with the button wiring. I'd forgotten how time intensive wiring is.


Sorry about the photo rotation. I rotated this when I cropped it, and all the windows programs show it with the correct orientation, but it the orientation seems to be ignored by the forum software.
Mark

New life to the old Maho control panel


www.aliexpress.com/item/KD2-21-LED-self-...26&priceBeautifyAB=0

www.aliexpress.com/store/product/15-inch...2.0.0.5bbc6f02e0Pv79