How to Adjust Module Trigger Value

This document describes how to adjust the trigger sensitivity of the FLY-Alps pressure sensor to ensure leveling accuracy and reliability.

Video Tutorial

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Preparation

Before starting to adjust the trigger value, ensure:

1. The module is properly connected to the mainboard
2. The ALPS firmware has been flashed and is running correctly
3. The configuration file has been loaded successfully

Step 1: Enable Module

1.1 Send Enable Command

Send the following command in the Klipper console to activate the pressure sensor's enable pin:

SET_PIN PIN=_probe_ready VALUE=1

1.2 Verify Module Status

After sending the command, observe the trigger indicator light on the module:

• Normal status: The indicator light should be off
• Test trigger: Use a metal object (e.g., tweezers, wrench) to gently touch the nozzle; the indicator light should turn on

Notes

• If using a non-metal object for testing, pay attention to the hot end temperature to avoid damaging the object
• If the indicator light stays on or flashes, check the EN pin wiring and configuration

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Step 2: Adjust Pressure Trigger Value

2.1 Connect Configuration Tool

1. Use a USB data cable to connect the FLY-Alps module to the computer
2. Open FLY-Alps Configuration Tool
3. Select the correct serial port number
4. Click the "Connect" button

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2.2 Configure Sensitivity

After successful connection, you can:

• View current ADC value: Monitor the raw data of the sensor in real time
• Set trigger threshold: Adjust sensitivity based on actual needs
• Test trigger effect: Verify if the configuration is appropriate

Suggestions

• The smaller the value, the more sensitive the sensor (easier to trigger)
• The larger the value, the more pressure is needed to trigger
• It is recommended to find the most suitable threshold through actual testing

Common Issues

Issue	Possible Cause	Solution
Indicator light stays on	EN pin wiring error	Check wiring and configuration
Unable to trigger	Threshold set too high	Lower the sensitivity value
Frequent false triggering	Threshold set too low	Increase the sensitivity value

Further Information

If you encounter other issues, please refer to the FAQ Document