Problems installing the IR Probe on the Duet Ethernet V 1.04 in analog mode
1.) My IR Probe blinks only 2 x after switching on the printer -> Digital Mode
(even if board is only powered via USB)
This seems to be the real problem, because according to the description *) it should blink 4 times.
In other words:
I can't get the IR sample to work in Analaog mode on Duet Ethernet.
2.a) Test on laboratory power supply with 3.3V with open "out" output at the sensor lets it blink 4 times -> Analog Mode
2.b) Additional pull-up resistance 33k between "out" and "vcc" causes the sensor to flash 2 x -> Digital Mode
Under condition 2.a) I do not get a linear output signal depending on the distance. Only 3 values for the distance/voltage:
0V far away (LED off),
1.5V approached (LED off),
1.7V very close (LED on)
But this seems to be the function of the module in analog mode. Or am I mistaken here ?
This is also reflected in the printer. Also with M558 P1 I get only the values 0 or 1000 according to the digital mode.
Cable connections:
IR Probe / Duet Ethernet (Z Probe Connector)
GND / GND
VCC / +3.3V
out / Z Probe In
At first I thought my IR sample was defective.
My second one (ordered because of suspected defect) behaves like the first one.
I also made a 2nd connection cable from the IR Probe to the Duet Ethernet. This and the previous one I measured for errors at the contacts. But I can't see any error here either (e.g. contact from GND).
Where is my thinking error, please help me.
*)
https://miscsolutions.wordpress.com/mini-height-sensor-board/
