How to Adjust Module Trigger Value

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

Video Tutorial

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Preparations

Before starting to adjust the trigger value, please ensure:

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

Step 1: Enable the 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 State: The indicator light should be off.
• Test Trigger: Gently touch the nozzle with a metal object (e.g., tweezers, wrench), the indicator light should turn on.

Notes

• If using a non-metallic object for testing, be mindful of the hotend 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. Connect the FLY-Alps module to your computer using a USB cable.
2. Open the 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 sensor's raw data in real-time.
• Set Trigger Threshold: Adjust sensitivity according to actual needs.
• Test Trigger Effect: Verify if the configuration is suitable.

Suggestions

• A smaller value makes the sensor more sensitive (easier to trigger).
• A larger value requires more pressure to trigger.
• It is recommended to find the most suitable threshold through practical testing.

Common Issues

Issue	Possible Cause	Solution
Indicator light stays on	EN pin wiring error	Check wiring and configuration
Cannot trigger	Threshold set too high	Decrease the sensitivity value
Frequent false triggers	Threshold set too low	Increase the sensitivity value

More Information

For other issues, please refer to the FAQ Document.