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Lemon Rx StabilizerPLUS LM0042 Essential Instructions

7-channel receiver
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Contents
Introducing the Lemon Stabilizer PLUS .................................................................................................... 2
Requirements ......................................................................................................................................... 3
Functions ........................................................................................................................................................ 3
Transmitter Requirements .............................................................................................................................. 3
Servos and Power Sources.............................................................................................................................. 4
Setting up the StabPLUS.......................................................................................................................... 5
Installation ...................................................................................................................................................... 5
Binding ............................................................................................................................................................ 6
Setting Failsafe ................................................................................................................................................ 7
Flying ..................................................................................................................................................... 7
Preparing for the First Flight ........................................................................................................................... 7
First Flight ....................................................................................................................................................... 9
Setting up the Stabilizer PLUS in more Advanced Models ............................................................................. 9
Adjusting Gain .............................................................................................................................................. 10
Resetting the Stabilizer ......................................................................................................................... 11
Resetting Level and Alignment (Toggle during initialization) ....................................................................... 11
Resetting Stick Neutrals (Toggle after initialization)..................................................................................... 12
Calibration of the Sensors (no action normally needed) ............................................................................. 13
Special Options .................................................................................................................................... 13
Stabilizer Always-ON (requires Rebind) ........................................................................................................ 13
Mode Order and Autolevel Setting (Bind Plug on channels 4, 5, 6) ............................................................. 14
Hardware Reset (Bind Plug across channels 2, 3, 4)..................................................................................... 14
Other Issues ......................................................................................................................................... 15
IMPORTANT: Don't use Autolevel with Flaperons or Aileron Differential .................................................... 15
Using Other Mixes with Autolevel ................................................................................................................ 15
IMPORTANT: Don't Use Elevon and V-tail Mixing in the Transmitter ........................................................... 16
Alignment and Mounting of the StabPLUS ................................................................................................... 16
Annexes ............................................................................................................................................... 17
Annex A: What do those tiny cryptic letters on the label mean? ................................................................ 17
Annex B: Stabilizer Mode Settings ................................................................................................................ 17
Annex D: Using a Two-Position Switch to Control Stabilization ................................................................... 18
Annex E: Setting up a DX6i for the StabPLUS ............................................................................................... 18
Further Information
For more detailed information see the
A number of short instructional videos for the Stabilizer PLUS are available on the same RCGroups post.
To offer comments or raise questions about the Stabilizer PLUS or the instructions, please go to
Lemon STABILIZER PLUS thread
Lemon RX StabilizerPLUS
7-Channel Receiver - LM0042/43/44
Essential Instructions
Reference Guide to the Lemon RX Stabilizer
on RC Groups.
V. 1.5 - Updated 2022, February 28
PLUS.
The Official

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Summary of Contents for Lemon Rx StabilizerPLUS LM0042

  • Page 1: Table Of Contents

    Annex F: Using Channel 7 on the Lemon Stabilizer (v4 and v4.5) and StabPLUS ......... 18 Further Information For more detailed information see the Reference Guide to the Lemon RX Stabilizer PLUS. A number of short instructional videos for the Stabilizer PLUS are available on the same RCGroups post.

  • Page 2: Introducing The Lemon Stabilizer Plus

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 Introducing the Lemon Stabilizer PLUS Building on the great success of its basic 7-channel stabilized receiver, Lemon RX developed the Stabilizer PLUS with the following additional features and capabilities: • Seven fully usable channels (when using Always-ON feature or with stabilization switched OFF) •...

  • Page 3: Requirements

    Delta Wing (elevon), V-tail and Flaperon mixes. These documents are prepared by jj604 (John) and Daedalus66 (Nigel). We have worked closely with the people at Lemon RX but are not paid by, or associated with, the manufacturer. Functions As it arrives, the StabPLUS has all DIP switches (J1-J6) set to OFF.

  • Page 4: Servos And Power Sources

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 Transmitters with only a two-position switch on channel 5, such as the older examples of DX4e and DX5e, as well as programmable ones that lack the ability to assign a suitable three-position switch, can be set to access either Gyro or Autolevel, but not both, as explained under Changing Mode Order (see page 9).

  • Page 5: Setting Up The Stabplus

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 Setting up the StabPLUS Installation These instructions are intended to explain the basic steps in setting up the Lemon Stabilizer PLUS for a conventional model (no elevons or V-tail). The following channel assignments are used:...

  • Page 6: Binding

    OFF and Gyro, as explained under Changing Mode Order (see page 14). Lemon RX have not tested the stabilizer with the pins oriented towards the front of the model, but users have reported installing it this way without problems.

  • Page 7: Setting Failsafe

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 Setting Failsafe No-pulse failsafe: By default, the receiver will, on loss of signal, stop sending pulses to the servos and ESC. This should cause the ESC to cut power to the motor, while the servos stay where last commanded. This achieves the basic failsafe requirement for most electric models –...
  • Page 8 Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 4. Set the stabilizer mode to Autolevel (Indicator 2: Red and Green alternately flashing slowly). Rotate the model about the pitch and roll axes and watch for the ailerons and elevator to deflect and stay deflected when it is not level.

  • Page 9: First Flight

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 13. You may also wish to add 20% Expo, or somewhat more, to soften control responses around neutral, but keep in mind that stabilization has an expo-like effect. First Flight 1. Power up first the transmitter and then the receiver.

  • Page 10: Adjusting Gain

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 in command. Learning pilots should be sure to wean themselves off dependence on Autolevel mode as they build basic flying skills. There are several ways to use the Lemon StabilizerPLUS in relatively maneuverable or fast models: 1.

  • Page 11: Resetting The Stabilizer

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 To achieve optimum gain, it is necessary to increase the gain for any axes(s) that did not show oscillation in the above test. Increase the gain in small increments, testing both Gyro and Autolevel mode, always looking for oscillation at increased airspeed.

  • Page 12: Resetting Stick Neutrals (Toggle After Initialization)

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 This is also required if the stabilizer is mounted inverted or on edge (e.g., on a profile fuselage), or if the unit is mounted not quite level. All these cases require toggling.

  • Page 13: Calibration Of The Sensors (No Action Normally Needed)

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 The Stabilizer PLUS performs best, especially in Autolevel mode, when trim and subtrim settings are kept to a minimum. Where possible, use mechanical adjustments to eliminate the need for large trim offsets, then reset the stick neutrals as described above.

  • Page 14: Mode Order And Autolevel Setting (Bind Plug On Channels 4, 5, 6)

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 Mode Order and Autolevel Setting (Bind Plug on channels 4, 5, 6) A bind plug inserted across the signal pins of channels 4, 5 and 6 will cause the Stabilizer PLUS to use the blue/green Indicator 1 lights to display the current Stabilization Mode Order: •...

  • Page 15: Other Issues

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 Other Issues IMPORTANT: Don't use Autolevel with Flaperons or Aileron Differential Autolevel mode on the StabPLUS is intended to help you stay within safe limits and recover from difficult situations. In using it, however, you must accept some limits on your options. In particular, Autolevel is incompatible with both Flaperons and Aileron Differential.

  • Page 16: Important: Don't Use Elevon And V-Tail Mixing In The Transmitter

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 IMPORTANT: Don’t Use Elevon and V-tail Mixing in the Transmitter Like other stabilizers, the StabPLUS absolutely requires that any elevon (delta wing) or V-tail mixing MUST take place in the stabilizer and NOT in the transmitter. Use of any such transmitter mixing will almost invariably cause a crash immediately after takeoff! This is true even when the stab is turned OFF by the transmitter, using channel 5 (Gear).

  • Page 17: Annexes

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 Annexes Annex A: What do those tiny cryptic letters on the label mean? Annex B: Stabilizer Mode Settings The inputs required by the Stabilizer PLUS on channel 5 (Gear) do not need to be exact. The following ranges will be recognized as defining the three Stabilization modes: •...

  • Page 18: Annex D: Using A Two-Position Switch To Control Stabilization

    Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 Annex D: Using a Two-Position Switch to Control Stabilization Many older transmitters, such as the DX6i have only a two-position switch (-100/100) for channel 5 (Gear). One way to deal with this limitation is to set the Mode Order to allow one desired type of stabilization. In the default Mode Order (OFF/Gyro/Autolevel), a two-position switch will select OFF or Autolevel.
  • Page 19 Lemon RX Stabilizer PLUS Receiver – Essential Instructions v.1.5 1) Do not use channel 7 for retracts. Instead, assign electric retracts to channel 6 and use channel 7 for a function such as flaps (few servos cause the problem). 2) Plug in the channel 7 connector after the receiver has powered up (usually inconvenient).

This manual is also suitable for:

Stabilizerplus lm0043Stabilizerplus lm0044

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