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Essential Instructions (LM0086X)
Description ......................................................................................................................................... 1
Setting Up the LM0086X Receiver ....................................................................................................... 2
Step 1: Powering the Receiver .................................................................................................................................. 2
Step 2: Binding the Receiver ..................................................................................................................................... 3
Step 3: Setting Failsafe .............................................................................................................................................. 3
Step 4: Activating Stabilization ................................................................................................................................. 4
Step 5: Using Stabilization ........................................................................................................................................ 7
Using Telemetry ................................................................................................................................ 12
Factory Reset the Receiver ............................................................................................................... 13
Appendices ....................................................................................................................................... 14
Appendix 1: Setting Up Text Display with EdgeTX .................................................................................................. 14
Appendix 2: Meaning of the LM0086 Receiver LEDs .............................................................................................. 14
Appendix 3: Understanding Throttle Lock .............................................................................................................. 15
Appendix 4: Troubleshooting Text Display ............................................................................................................. 16
This document is specifically tailored to the LM0086X receiver. For instructions relating to the earlier LM0086,
which did not have the Text Display programming feature, here is the download link:
https://www.rcgroups.com/forums/showatt.php?attachmentid=16965449&d=1676162451
Description
The Lemon Rx LM0086 Seven-channel Stabilized Receiver is a full range DSMX/DSM2™-compatible receiver, part
of Lemon's Generation 2 line. It combines full-range telemetry functions with the well proven Lemon rate
stabilizer technology to iron out the turbulence.
The Lemon stabilizer is small and light. Despite its low cost, it offers long range and high performance with its
"dual diversity" antenna system. A Lemon DSMP satellite receiver can be added to enhance signal reliability but
is not normally required.
The slim line case, seven available channels and built-in barometric sensor will be particularly attractive to glider
pilots requiring a compact package.
The receiver automatically switches mode between DSMX™ and DSM2™ as required.
The LM0086 works with virtually any programmable Spektrum transmitter, including the first- and second-
generation DX series, as well as the newer NX and iX transmitters. It also works with open-source transmitters
using an add-on DSM2 or DSMX compatible module, as well as with Multiprotocol transmitters such as
RadioMaster TX16S. Telemetry is available if supported by the transmitter.
Despite being labelled a 7-channel receiver based on the number of available control channels, the LM0086 also
provides stabilizer Master Gain on channel 8. Thus, an eight or more-channel transmitter with voice capability is
required to allow use of all the available functionality, but configuration options allow operation with radios
having fewer features or channels.
1
7CH TXT Essential Instructions v1a.docx
2024-09-03
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Summary of Contents for Lemon Rx LM0086X
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Page 1: Table Of Contents
Appendix 3: Understanding Throttle Lock ......................15 Appendix 4: Troubleshooting Text Display ......................16 This document is specifically tailored to the LM0086X receiver. For instructions relating to the earlier LM0086, which did not have the Text Display programming feature, here is the download link: https://www.rcgroups.com/forums/showatt.php?attachmentid=16965449&d=1676162451... -
Page 2: Setting Up The Lm0086X Receiver
The original version of the LM0086 used LEDs and buttons for programming. The new version, introduced in August 2024 and referred to as the LM0086X, added the Text Display feature to simplify programming, but it also retains the earlier lights and buttons programming approach as an option. -
Page 3: Step 2: Binding The Receiver
Step 2: Binding the Receiver To bind the receiver to a specific model memory in the transmitter, use either of these two methods: Binding Using the Bind Button 1. Power ON the receiver (with satellite receiver connected, if used). 2. Hold down the Bind button B for about 3 seconds. 3. -
Page 4: Step 4: Activating Stabilization
Programming the Receiver For the LM0086X, programming the receiver to activate stabilization can be done in either of two ways: (1) with Text Display, using the transmitter to display and adjust the various settings, or (2) the older way, using LEDs and buttons on the receiver. - Page 5 Please note that Text Display cannot be added to older telemetry receivers and does not apply to any non- telemetry receivers. Text Display was officially announced in August 2024 and a new label was introduced, recognizable by the absence of fine print relating to receiver LEDs (see old and new labels at right).
- Page 6 The Lemon RX display should become something like this one. The first line with the number indicates what you can change. In this case the response direction of the Ailerons.
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Page 7: Step 5: Using Stabilization
Basic Screens Available in Setup Mode Seven screens are initially accessible in Setup Mode. The first four directly change settings: 1. Change the direction of roll (Aileron) stab reaction. 2. Change the direction of pitch (Elevator) stab reaction. 3. Change the direction of yaw (Rudder) stab reaction. 4. - Page 8 3. Test the receiver Power up the transmitter then the receiver. The red Status LED should be ON. Check that the Stabilization ON/OFF switch works correctly. The green Status light on the receiver will be OFF if channel 7 is at 0% or 100%.
- Page 9 6. Verify control directions, adjust centring and servo throws Power ON. Use the Stabilizer ON/OFF switch to turn stabilization OFF (green Status light OFF). Be sure you know which way is OFF in case you need to use it in a hurry! With trims in neutral, adjust servo arms and linkages to align your control surfaces.
- Page 10 THE FOLLOWING IS VITALLY IMPORTANT: If stabilization moves any of the surfaces the wrong way (i.e., to increase the disturbance), your model may be uncontrollable (until you switch off stabilization)! To correct this, use Setup Mode described on page 6 to change the appropriate stabilization response direction indicated by the Text Display screen or three green LEDs: G1 (aileron), G2 (elevator) or G3 (rudder).
- Page 11 12. Test fly For safety, always start a test flight with the stabilizer turned OFF (green Status light OFF). Power ON the model. Take off and fly around, adjusting trim as necessary to make sure the model flies properly without stabilization. If trim is very far off neutral, land and make mechanical adjustments.
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Page 12: Using Telemetry
Telemetry is independent of stabilization and can be used with the receiver in stabilized or unstabilized configuration. The document “Telemetry with the Lemon Rx 7- and 10-Channel Receivers” explains in detail how to setup and calibrate the Telemetry function: https://www.rcgroups.com/forums/showatt.php?attachmentid=17692169 This section just mentions some highlights. -
Page 13: Factory Reset The Receiver
This is set up using the File Settings item on the Telemetry screen. To recalibrate the receiver’s telemetry to specific voltage and/or current sensors, use screens 14 and/or 15 in the Advanced Screens, and follow the Instructions in the document “Telemetry with the Lemon RX 7 and 10 Channel Receivers”: https://www.rcgroups.com/forums/showatt.php?attachmentid=17692169. -
Page 14: Appendices
TOOLS icon (Wrench and Screwdriver), then select “DSM Smart RX Telemetry”. On the screen that appears, scroll down to TextGen and select it. The LEMON RX screen will then display. With a black and white screen EdgeTX radio the required script file must be downloaded from GitHub and copied to the SD card. -
Page 15: Appendix 3: Understanding Throttle Lock
Note that either R1 or R2 or both must be ON for stabilization to be active. Thus, setting R3 without either Option B or Option C will have no effect. Settings are retained even when power is removed. Once a stabilized option is set, stabilization can be turned on and off in flight by a switch on the transmitter. When stabilization is ON, the green Status LED will be illuminated. -
Page 16: Appendix 4: Troubleshooting Text Display
“TextGen”. Make sure it is “Act” (Active) not “Inh” (Inhibited). Go back to the main screen and scroll to the right until you come to the “Lemon RX” telemetry page. Problem 2: Setup Mode does not work With some early versions of the Text Display firmware, basic text information may be displayed but Setup Mode will not be available.
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