About M591 Set

[huai3895]

As this course ,i chonice P7 to sensing filament,i use a itr9608 made pcb to Detect rotation

However,when i connect it directly to duet3 ,It often works erratically.
Why? so I think maybe it doesn't produce pure pulses with the same width
I plan to use a singlechip to collect signal from itr9608,and send Pure pulse to duet3.

Questions:
1,Is my guess correct?
2 ,if its correct ,what is the standard of pulse?

[dc42]

@huai3895 the issue people have had before with pulse-detecting optical filament sensors is that there isn't a clean transition at the start and end of each pulse. The solution is to use a Schmitt trigger or a comparator with positive feedback to process the output from the opto switch.