Category: General LinuxCNC Questions
EDM is very noisy and may have voltage spikes on the "ground"
that exceed the +-25V peak limitations of the 7I96S encoder
inputs.
Since it appears the you did not connect the grounds together there is
opportunity for these spikes to damage the 7I96 inputs. It may well be OK
but the way is was connected could not work.
I think you misunderstood the PWM output. It does no appear to be
a differential signal, so must connect to PWM --> IDX+ and GND --> GND
The frequency pin should show the current PWM frequency
The valid pin is true when the PWM frequency is above the
minimum frequency (basically a fault indication)
