The Parallel port isn't dead! (sub topic - Linuxcnc is cool)

[skunkworks]

+/- 10 volts out of the printer port..

Found some circuits here.. https://www.eevblog.com/forum/beginn...to-10v-signal/

The first one from the forum seemed simple enough to try - although it took me a bit to figure out the filter was setup as a high pass - not low pass.. After figuring that out it made sense..

It should be more than good enough to do closed loop spindle control - and constant surface speed...

[RB211]

+/- 10 volts out of the printer port..

Found some circuits here.. https://www.eevblog.com/forum/beginn...to-10v-signal/

The first one from the forum seemed simple enough to try - although it took me a bit to figure out the filter was setup as a high pass - not low pass.. After figuring that out it made sense..

It should be more than good enough to do closed loop spindle control - and constant surface speed...

That's a handy circuit to know. Since I have the Mesa breakout, I'd probably get some daughter cards.

[skunkworks]

getting closer... Single channel 100 line encoder using missing tooth functionality...

[RB211]

getting closer... Single channel 100 line encoder using missing tooth functionality...

Pretty cool, I'd love to find a small emco like that for the right price