Issues with "IR Height Sensor" with Ender3

General Discussion
1

Basic Information:

Printer Model: Ender3
MCU / Printerboard: 1.1.4

Describe your issue:

I am new to klipper, and am having inconsistancy with zprobe. Basically in normal mode, probe should trigger at a certain height, and the LED will turn on. But I am getting triggers before light even turns on. Manufacturer says there is also a mode that if you don’t use pullup resistor it will work in a psuedo-analog mode, but I have verified that I have configured the pin as “^PA4” so pullup should be activated. What else can I try?

2

Hello @LakeWorthB !

There was a query for the klippy.log.

3

Turns out the issue was with the probe sensor needing the pull-up resistor on pin within 4 seconds of starting up, or it gets in analog mode. And Klipper takes longer than that. I added an external pull-up resistor to pin, and it works good now.

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