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SLG-20 Retractable Landing Gear Manual
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  • Safety Notice
  • Operation
    • Operation Overview
    • Control States
    • Input Signal Requirements
    • Parameter System
    • Pre Flight Checks
    • Spring Tension & Replacement
    • Auto Calibration & Servo Insertion
  • Console Interface
    • Using the Console Interface
    • Accessing the Console Interface on Windows
    • Accessing the Console Interface on Mac
  • Firmware and Software
    • Firmware Update Procedure
    • Firmware Releases
    • Loader Releases
  • Installation
    • SLG-20-AX Quick Start Guide
    • SLG-20 Quick Start Guide
    • Mounting and Hole Patterns
    • Electrical
    • Assembling Legs
  • Reference
    • Known Issues
      • Roll Oscillations on New Alta X Model
    • Servo Types
    • Payload Clearance
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  1. Operation

Parameter System

Parameter System for XM2 Labs SLG-20 Retractable Landing Gear

PreviousInput Signal RequirementsNextPre Flight Checks

Last updated 2 years ago

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The SLG-20 parameter system is stored on persistent memory. The parameter system is primarily used to store calibration data.

Parameters are loaded from persistent memory into RAM on boot. Parameters can be updated in RAM and tested without saving to persistent memory. The parameter system is accessed using the console interface as described in the of this manual.

Parameter List

Parameter

Default Value

Description

ee_check

26

This parameter is used to check if the EEPROM is valid and the legs are calibrated. A value of 27 indicates the EEPROM is valid and SLG-20 retractable landing gear is calibrated. This parameter is automatically set to 27 when the attached SLG-20 are calibrated. If this parameter is not 27, the SLG-20 will boot in ERROR mode, parameters will be reset to defaults, and for safety reasons the legs will not actuate.

dev_id

1

Not used

left_trim

100

The starting position of the LEFT servo in centidegrees. This parameter is automatically set by the calibration procedure, but can be adjusted manually with care.

right_trim

8100

The starting position of the RIGHT servo in centidegrees. This parameter is automatically set by the calibration procedure but can be adjusted manually with care.

fs_ms

500

Timeout before loss of input signal will trigger a failsafe in milliseconds

srv_type

0

Type of servo motor. Set to 0 for the D951-TW, Set to 1 for the HS-7950-TH, Set to 2 for the D951-TW-V2. If unsure, refer to

console interface section
Servo Types