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I try to replace the Z sensor by sensor BLtouch. How to find the correspondence between the connection of the sensor and the pin of the motherboard (** Ultimaker 2X for Ultimaker Original +).

I noticed it in the firmware (pins.h) #define Z_STEP_PIN 35

#define Z_DIR_PIN 36

#define Z_STOP_PIN 29

#define Z_ENABLE_PIN 34

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Umm... One question, Ultimaker 2+ and Ultimaker Original + use the same board, except some UMO+ models have 2.1.2 and others 2.1.4 version. The only difference on the pins should be the PWM 5V hotend fan afaik. So in theory if you have something working on UM2+ the pins should be the same on UMO+

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