capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi
-
maybe @dc42 can comment on that.
-
@fcwilt said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
@Gerd said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
Yes the control LED on the board did track the situation, triggered - on, untriggered -off.
I tested with a microswitch, everything works fine.
Gerd
Well I'm at a loss as to what is going wrong.
When you say you measured the signal level at the board input pin did you actually touch the meter probe to the pin itself?
Frederick
I measured at the pin now, 3,4V (untriggered) and 1,45V !!!!! (triggered)
why this?
-
@Gerd said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
I measured at the pin now, 3,4V (untriggered) and 1,45V !!!!! (triggered)
Well there is the problem - both of those states are the same logic level as far as the board is concerned.
You must have a wiring error.
Frederick
-
@fcwilt said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
@Gerd said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
I measured at the pin now, 3,4V (untriggered) and 1,45V !!!!! (triggered)
Well there is the problem - both of those states are the same logic level as far as the board is concerned.
You must have a wiring error.
Frederick
Frederik, what can I do?
-
post a picture of your actual wiring
-
@Veti said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
post a picture of your actual wiring
-
This post is deleted! -
are those really 10k and 68k resistors?
the colours dont match the ones i find online -
@Veti said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
are those really 10k and 68k resistors?
the colours dont match the ones i find online10k from GND to STP and 56K to Signal of the sensor
-
the wiki says 10k and 68K
-
@Veti said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
the wiki says 10k and 68K
-
i dont know what you are trying to tell me with that picture.
If R2 is 10K, then suitable values of R1 are 30K if the sensor is powered from +12V, and 68K if it is powered from +24V.
nowhere does it mention 56k resistors
-
@Veti said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
i dont know what you are trying to tell me with that picture.
I misunderstood, I think you mean the resistor I took is 68K.
Yes I also tested a 68K resistor, same problem. With the 68K I measured 2,95V untriggered.
-
@Gerd said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
With the 68K I measured 2,95V untriggered.
and triggerd?
-
@Veti said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
@Gerd said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
With the 68K I measured 2,95V untriggered.
and triggerd?
a few mV
-
that should be interpreted as 0 and 1
-
@Veti said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
that should be interpreted as 0 and 1
yes it should, but it didn't
-
since its high on untriggered you might not need the pull up resistor.
try without the ^
-
@Veti said in capacitive sensors PNP (NC) 10-24V for endstops on a Duet Wifi:
since its high on untriggered you might not need the pull up resistor.
try without the ^
Yes I also tried with the pullup resistor
-
I'll stop for today.
Thank you for your help and your patience!
Gerd
