New build - opto sensors

[nosomis]

Hi,
Just finished my felix 2.0 build.
Everything seems to be ok but the opto sensors dont work.
The green led lights are on but do not switch off when I put something in the groove.
Wired exactly as instructions indicate.

Any help would be appreciated, thanks

[Hugues]

have you tried to put black tape or paint on the blade,
because the plastic itself can let some light go through it.

[nosomis]

Thanks for tyour reply.
Yes, I've tried everything.
They have good power across red and black wires 6.6V volts and the green led in on.

[Hugues]

i remember a recent thread on this forum about similar problems with the opto sensors,
i vaguely remember there was something with the wiring diagram...
thread is here if ever you haven't found it:
http://www.felixprinters.com/forum/view ... nsor#p3321