On 02/23/2020 09:24 AM, Ed wrote:
Is there an easy way to add encoder inputs on a 4 axis
Pico Systems setup? Hopefully without giving up I/O.
Specifically adding a hand wheel and to select feed rate
and spindle speed.
No easy way to do that. On one of my machines I have no
additional encoder counters (3 axes plus spindle encoder)
so I ran it in through the general purpose I/O.
Now, there are a couple other ways to go. One would be to
add a PCI (or PCIe) parallel port, set it to input mode
and you get 11 (I think) inputs. These would be plenty
adequate for a jog pendant.
Or, if you have enough I/O left, you can do like this :
http://pico-systems.com/pendant.html
There are links to some hal files and schematics that show
how to do it with minimal I/O by multiplexing the selector
switches. Using a few diodes, you can cut the I/O pins down
to seven, and still have 7 selections plus 3 jog rates.
I have XYZ plus feedrate override and spindle override on my
selector.
Jon
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