Instruction Manual for GuardianTM Stabilization
Contents
1. OSD Pro menus described above and in the OSD Pro manual 1 Run the Servo Analysis Wizard This step lets the Guardian know how much deflection it can use when stabilizing your airframe Additionally this teaches the Guardian the directions of your servos When the wizard asks you to Mov Rudder Aileron Stick Left deflect the aileron stick to the maximum extent that you would normally use in flight normally the maximum throw Do the same with the elevator stick when requested to Mov Elev Tx Stick Back Climb Note When not using the Guardian the amount of stick deflection during the wizard was used to set the maximum elevator and aileron rudder stick throws for RTH so it was recommended to use only limited stick movement However with the Guardian the RTH limits are set as angles as described below and giving the full stick movement during the wizard is necessary 2 For initial testing we recommend turning on Servo Deflection Display When stabilization is turned on the present Overall Gain setting is displayed as G in the servo deflections and the present pitch and roll of the model are also displayed Further we recommend enabling the Artificial Horizon display which will help to validate that the Guardian is mounted and operating correctly 3 Choose your airframe type with the Choose Model Wing Type menu by selecting either Fixed Wing or Elevon type Both of these modes require that your radi2. Pitch Roll and Overall Gains your airplane begins to oscillate in the Yaw axis during Heading Hold reduce the Turn Gain until no oscillation is detected After enabling Heading Hold on the ground it is recommended that as part of your preflight checks you yaw the model rotate it gently so that the wings rotate around like helicopter blades and observe the Ailerons Elevons Confirm that the control surfaces are asserting a turn that would bring the airplane back to its original heading When the airplane is pointing directly at its currently locked heading the control surfaces should be oriented for level flight Note Remember to reset your current heading before takeoff to prevent an immediate turn This is done by pointing your model in the direction of takeoff and moving the Ailerons via the control stick Note Heading Hold will not work with the Stabilization Overall Gain set to 0 Note After trimming your Aileron Roll axis control stick remember to run Reset Cruise Sticks Throtl or Heading Hold may become disabled Preflight The Guardian requires no warm up period before flying But before every flight it is strongly recommended that you perform the following steps 1 Perform your normal preflight check Ensure your servos respond correctly to your RC control stick commands 2 To test that the Guardian is working hold the airplane level Now pitch and roll the model You should see the control surfa
3. Velrco to hold it firmly to your airframe while reducing vibrations To reduce the risk of the Guardian coming loose tape adhesive or a mechanical restraint may be used Mounting the Guardian flat relative to level flight is important However minor mounting offsets can be compensated for by invoking your OSD Pro menu and using the Configure Guardian Stabilizer gt Reset Level Flight option described below IMPORTANT When viewing the AHI through the OSD Pro as provided by the Guardian Expander after resetting level flight the line should closely follow the horizon as the plane is pitched and rolled If the AHI appears to be moving in the opposite direction of the horizon in the pitch and roll axes then you likely have the Guardian Expander mounted backwards If just the pitch axis is moving in the incorrect direction as the plane is moved then the Guardian Expander may have been mounted upside down Ensure that the label is facing towards the sky and the 4 conductor wire is pointing towards the tail of your model Vibrations The Guardian is able to reject most levels of vibration However very strong vibrations can impact stability To check for this issue after mounting the sensor perform a vibration test by securing your model to a test bench or stand and ramping up the throttle slowly while watching the AHI on your OSD Pro If the AHI begins to pitch or roll significantly during this test remount your Guardian sensor further awa
4. EAGLE TREE SYSTEMS Instruction Manual for Guardian Stabilization Expander Document Version 1 9 Corresponds to Eagle Tree Software Version 10 01 or higher Contents WARP OG UCTION 4 coescrccetict ce fechas a accel ae a fo ev secede decearen tates e sustencet anche ovscttets E EEEE E Deets 1 CONNECTION ANG MOUNTING sessirnar e e sawed de aeo Eeee eao ae eer aoaea reee asa stbaeeassusSesenadatinaesbeleesectunteeensteessonseGees 2 Important Differences in OSD Pro Configuration when using Stabilization cccccsscessseceeeecesssecssseecsseeecseesseesssaeeseneeesaees 2 Guardian Stabilization On screen MONS c cccccccesssssssececececesseeeceeeceseeeeaeaeeeeeeeseesseseeaeeesecsseesesaeaeeesenseesaeaeseeeesseesesssaaeaeesenens 3 Guardian Configuratio Neriie Meise dees oa al eee ete as enue alee een ed aed eke 4 The ServovAnalysis WiZard icssc svessccrsvaseressacesenbpsevasesiensversvsdducesvusseesnudsneodhsdcaosties oobssdceespaedsrospasdeosbtnsdeosisenenbhdsdesbyNesuepsblal dossheatseo ideaess cones caps tnldabesnsdsaenstnesensvedls 4 Reset Crise Sticks Uni Ot eeina EE EAE A EENE ETE ENEO aven tess ened sas E ENA EEEE EOE EA 4 Taning Stabilization GINS mesrine inseriu eaer aariaa ran ein EIRETAT AA E AR AANE EORPA EE AS Aa A AERA EEA AE EAERI 4 Stabilizanon THEOrY itches Sects n E EA E E EN EA N ERE NEE EE E E ORAE AER 4 Stabilization Master Gain KOOD cis sssseccsegscassavscewedesasiuntasetvunsssnstuns ewadcensevatdesscvadecekasn
5. WARRANTY PERIOD AS DESCRIBED ABOVE NO WARRANTIES WHETHER EXPRESS OR IMPLIED WILL APPLY AFTER THE LIMITED WARRANTY PERIOD HAS EXPIRED SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS SO THIS LIMITATION MAY NOT APPLY TO YOU WE DO NOT ACCEPT LIABILITY BEYOND THE REMEDIES PROVIDED FOR IN THIS LIMITED WARRANTY OR FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES INCLUDING WITHOUT LIMITATION ANY LIABILTY FOR THIRD PARTY CLAIMS AGAINST YOU FOR DAMAGES FOR PRODUCTS NOT BEING AVAILABLE FOR USE OR FOR LOST DATA OR LOST SOFTWARE OUR LIABILITY WILL BE NO MORE THAN THE AMOUNT YOU PAID FOR THE PRODUCT THAT IS THE SUBJECT OF A CLAIM THIS IS THE MAXIMUM AMOUNT FOR WHICH WE ARE RESPONSIBLE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU Copyright 2011 Eagle Tree Systems LLC 7 http www eagletreesystems com
6. airframe s flight characteristics it is often helpful to be able to tune the controller in flight Increasing its value will turn on stabilization increasing the Guardian s effect until a full fly by wire behavior is achieved When this feature is used the stabilizer s control characteristics given the Master Gain Knob s position are as follows 100 Stabilization is OFF You can fly normally 100 0 depending on Pitch Roll gain values Medium Stabilization Your airframe is now inherently stable but depending on your knob selection may still be rolled by strong stick movements or turbulence Note The Max Stabilized Pitch Roll angles specified in the Configure Guardian Stabilizer menu may be exceeded in this range depending on the Master Gain knob s position flight behavior of your model and type of maneuvers attempted Do not attempt maneuvers that may destabilize your airplane e 0 100 Maximum stabilization The model should not roll over when in this range Servo commands will become exaggerated leading to tighter control of the plane and true Fly By Wire functionality Note that if you don t have a knob available on your radio you can also use the OSD Pro Aux 2 input as an on off switch for stabilization This is done by connecting a spare switch channel to the Aux 2 input Then depending on the endpoints programmed for your switch in your radio you can set the on and off stabilization levels
7. and turn off stabilization by flipping the switch If no connection is made to the OSD Pro Aux 2 input or you have not configured your OSD switch mode to 3 position or None the on screen Stabilizer Overall Gain setting is always used The Stabilizer Overall Gain setting is also always used during RTH Note The described behavior assumes a standard deflection controller with 100 being defined by a 1 1ms servo pulse and 100 being a 1 9ms pulse Warning When RTH is enabled the Guardian Overall Gain from the Configure Guardian Stabilizer menu is used even if the Aux2 input is configured to provide the Overall Gain as well If the menu value of Overall Gain in this menu is set too low then RTH will not be stabilized Displaying the Master Gain Onscreen To display the Master Gain on all OSD Pages turn on the Servo Deflections Display as described above With the Servo Deflection Display line enabled the G parameter on that line represents the Overall Gain Oscillations Sometimes when the controller gains are set very high or if there is a very high airspeed oscillations can develop If oscillations occur turn down the Master Gain knob change the inputs of your master gain switch or adjust the Overall Gain menu setting if a knob or switch is not being used until the oscillations stop Additional Features Center Stick Only Stabilization Some people looking for more aerobatic capabilities fro
8. ces deflecting appropriately to level the airplane If the control surfaces do not move at all ensure that if connected the Master Gain knob or Gain switch is set so that stabilization will occur If the control surfaces are moving the wrong direction it might be necessary to run the Servo Analysis wizard again making sure to follow the onscreen instructions closely First Flight First orient your model as it should be for level flight and execute the Reset Level Pitch and Roll command under the Configure Guardian Stabilizer menu This helps to compensate for any mounting errors with your Guardian On your first flight it is recommended that you do an unpowered hand toss of your airplane if yours is capable of hand toss launches If the airplane safely glides to the ground with little or no input then your configuration is correct If the model oscillates during the hand toss your Overall Gain is probably too high Once it has been shown that the Guardian has been correctly configured perform one last preflight check and take off with power Warning If taking off with stabilization turned up to a high gain be very careful to avoid overcompensation If the Max Pitch Roll angles for Stabilization are set to a large number say 60 degrees there could be a very strong response that might stall your airplane Move your sticks smoothly at first to get the feel for your more responsive airframe Once in the air and only when safe r
9. d with the Eagle Tree OSD Pro the Guardian provides full featured inertial stabilization and an on screen Artificial Horizon display No additional sensors are required The Guardian requires no warm up period after your model is powered The Guardian s advanced features make it easy for you to perform aerobatic maneuvers if you are capable and immediately return to stabilized flight when desired The Guardian is a stabilizer not a stall preventer In some airframes stalling can create unrecoverable conditions such as spins that may result in a crash Intended Uses The Guardian is intended to be used exclusively for recreational purposes in model planes boats and cars Any other use is not supported Packing List Your package should include the following The Guardian and a printed version of this manual Other Things You Need To utilize the Guardian you will need the OSD Pro system with an eLogger V3 or V4 NOTE The Guardian is NOT compatible with our Flight Data Recorder products Though stabilization will work without them a video camera and video transmitter on your model and a video receiver and video display on the ground are normally required Many Eagle Tree FPV dealers sell the required video equipment A list of our FPV dealers can be found on our website at http www eagletreesystems com OSD OSD Pro htm Steps to Follow Installation and use of your Guardian should be quite easy and enjoyable if you follow these
10. e Elevator receiver output to the OSD Pro s Aileron and Elevator servo inputs Then connect your servos to their corresponding OSD Pro servo outputs Note that when using the Guardian the ailerons should be routed through the OSD Pro if the model has both ailerons and rudder for proper stabilization and RTH Note that this is a change from the recommendation that the rudder be routed through the OSD Pro when the Guardian is not present Windows Software and Firmware Update To use the Guardian you must update your software to Eagle Tree Windows Software version 9 76 or later To update download the latest software from the support page of our website located at http eagletreesystems com Support apps htm After downloading and installing the software the firmware of your Guardian may need to be updated To upgrade your firmware connect your eLogger to USB and just click Hardware Firmware Control and click the Update button for the Guardian if the present firmware version is a higher number than the firmware stored in your Guardian Mounting the Guardian in your Model Mount the Guardian in your model placing it so the label is facing up and the airplane drawing on the label corresponds to the orientation of your aircraft A properly mounted sensor will be perfectly flat with its front facing the direction of flight when the aircraft is in level flight We recommended mounting the Guardian with a piece of two sided foam tape or
11. elease the control stick so it sits at zero input Your airplane should fly straight and level If not your Guardian may be mounted improperly You can land and run the Reset Level Flight command again This may be done in the air also if your piloting skills permit it Troubleshooting Below is a list of problems that may be encountered and steps to remedy them A good first step to troubleshooting is to download our latest software and update the eLogger OSD Pro and Guardian s Firmware via Hardware Firmware Control Doing this will ensure that you have the latest software and firmware available Just click Help Download latest updates in the software to check to see if a newer version of our software is available Tf your particular issue is not addressed by this update or by the suggestions below please visit our web support page for additional support options at http www eagletreesystems com Support support html Issue The message Stabilizer Disabled in Menu appears on the video screen during OSD Pro startup Solution This message indicates that you need to turn on stabilization if desired by setting the Stabilization Elevn Mixing On setting to YES as described in the Guardian Configuration section above Copyright 2011 Eagle Tree Systems LLC 6 http www eagletreesystems com Issue The message Ailron or Elevatr undetected appears on the video screen during OSD Pro startup Solution Th
12. few steps 1 First if you have not done so already read through the manuals for your OSD Pro eLogger GPS Expander and any other Eagle Tree sensors to familiarize yourself with the connection and function of these devices and set this equipment up 2 Read through this manual to understand the warnings determine the installation and setup sequence pre flight tests etc of the Guardian 3 If anything is unclear see the Have Questions or Feedback section below 4 Range test and enjoy Copyright 2011 Eagle Tree Systems LLC 1 http www eagletreesystems com Have questions or Feedback Eagle Tree is committed to providing great customer service If you ve read the manual and something is not clear just ask We d much prefer to take the time to answer your questions rather than having you waste your valuable time struggling with an issue To get help visit the Eagle Tree Guardian support thread at http www rcgroups com forums showthread php t 1399687 Chances are someone has posted a solution to your problem already If not posting your problem there will get a very quick response from the Eagle Tree community If you prefer to not post on the forum or you feel there is a problem with your Eagle Tree hardware please open a support ticket with us at http ticket eagletreesystems com and we will respond to your support ticket as soon as we can normally 1 3 business days Note that you may receive an answer to yo
13. g on conditions and aerodynamic performance In general the higher the gain the more responsive and resilient your plane will be to disturbances such as wind balance and trim issues Tuning the gains too high however may result in oscillations of the airframe It is recommended that the Overall Gain be used to tune the airframe until it oscillates and then be turned back down This will ensure the best performance while preventing future oscillations Warning Be careful while tuning the Overall Gain Some airframes may oscillate very strongly at higher gains possibly damaging themselves To avoid strong oscillations increase the Overall Gain slowly and reduce it as soon as oscillations are noticed Stabilization Master Gain Knob When the OSD Pro s Choose Menu Receiver Inputs option is set to 3 Position or None the OSD Pro s Aux2 input channel can be used as a Master Gain for the Guardian This overrides the OSD Pro s menu option Overall Gain during normal flight the Overall Gain setting is always used during RTH This Master Gain multiplies the individual Pitch Roll gains and serves as a way to easily tune both If you have an RC controller that has an analog knob this can be mapped to the Aux2 channel to allow for On The Fly stabilization gain adjustment This knob gives the ability to transition smoothly from stabilized flight to un stabilized flight Additionally since your airspeed can change your
14. idovssoudvowss SOE REONE AIEEE AODAN ONEEN EOCEEN NEEN EEEO ECEE C EAEE OEE 5 Displaying the Master Gaim Onscreen iiris ee nE lech hes eden Se EAER EAE EE AERE EOE ENE EREET E E EAEE 5 OSCAR OS t AAEE A RAE A casvoduesedvecn scsi E chacssxesbate dieses dasvusw sch Susesecns veroess E E ook ieesiacivectaseivevaacustons 5 Adaitional Feature S eeaeee ERR Eee e eee pe eee err ocr eer eE rere uae arene eer ete Aa E rece eer ee REEE 5 Center stick Only Stabilization ise oiana oE Ee E AEE AEE E EE E ANE EKERN EAEE EEE EERE 5 Heading Hold RECOmMENdEd ire venccesrsveckssieschecstoned scaseneises coksdscatvasoens Ouest sssvewtonaduestonedvesbore ENNE OSENI E ORESTES IIVET ESEE E EN 6 Preti e Gases a sae ne tee eE us fuse one e costes e aae ea a eiae EE a aO E ENEE EEE 6 LES PIS a RE E E A EASE E A A A AE A T AA 6 TROUBIESNOOUING IE A A E E E E T E A EE A dain S E S A 6 Introduction Thank you for your purchase This instruction manual will guide you through the installation and operation of your Guardian Stabilization Expander The latest version of this manual is available in the Product Manuals section of the Support tab on http www eagletreesystems com The online manual includes any updates that were made after your Guardian was purchased Please read the entire manual carefully before proceeding If after you read the manual you have further questions or problems see the Have Questions or Feedback section below What the Guardian Does When use
15. ilization On screen Menus Guardian configuration is done via the On screen OSD Pro menus Please see the OSD Pro manuals for more information on accessing the menus Here is a description of each menu item that may need to be adjusted for the Guardian Note that additional information for each menu item is provided in the following manual sections Note also that the default values are shown in parentheses and where relevant the range is displayed as min max default Configure Radio Control Menu Reset Cruise Sticks Throtl recaptures the model s aileron rudder elevator and throttle settings for level flight These settings are captured during the Servo Analysis Wizard but need to be recaptured if you have re trimmed your plane NOTE the throttle needs to be set at cruising speed position when this option is selected if the RTH feature is enabled Run Servo Analysis Wizard lets the Guardian learn about your servo directions and extents See the Guardian Configuration section below for more information Choose Model Wing Type Fixed This option lets you choose whether your model uses standard or elevon control Note that when the wing type is set to Elevon and Guardian stabilization is enabled the Guardian will do the servo mixing So your radio s servo mixing must be disabled But if you later turn off stabilization the Guardian will no longer do the mixing WARNING Never change this option during flight Stabilizat
16. ion Elevn Mixing On No Enables Guardian Stabilization and if you have an elevon model turns on Elevon Mixing WARNING Never turn this option off or on during flight if you have an elevon model Disabling stabilization will also disable the OSD Pro s elevon mixing Use the stabilization gain setting instead to turn off stabilization Elevon Recvr Microsecs 0 3000 1500 This sets the number of microseconds for a neutral pulse from your RC controller Do not change this unless you know the pulse length of your controller Most people do not need to adjust this and it is only relevant for elevon models Configure Guardian Stabilizer Menu Reset Level Pitch and Roll Click this option while holding the model level after installing the Guardian if the AHI line is not centered and level It will mitigate most mounting errors and provide a level AHI Stabilizer Pitch Gain 0 10 5 This controls the amount of stabilization in the pitch Axis If your airframe is oscillating along its pitch axis but never its roll axis it might help to reduce the Pitch gain e Stabilizer Roll Gain 0 10 5 This controls the amount of stabilization in the roll Axis If your airframe is oscillating along its roll axis but never its pitch axis it might help to reduce the Pitch gain Stabilizer Turn Gain 0 10 5 This parameter helps counteract trim issues that can cause gradual turns The higher the value the more compensation is added to norma
17. is message indicates that receiver pulses from either Ailron or Elevator channel were not detected Both of these channels are required for stabilizataoin to work correctly Make sure that the channels are connected correctly from your receiver Also note that some receivers will not send any pulses until the radio transmitter is turned on Issue The message Run RC Wiz for Stabilize appears on the video screen during OSD Pro startup Solution This message indicates that you need to run the Servo Analysis Wizard under the Configure Radio Control menu Issue The message Stabilizer using Menu Gain appears on the video screen during OSD Pro startup Solution This message indicates that the Aux2 input for Overall Gain adjustment is not being used The menu overall gain setting will be used instead Issue The message Stabilizer Disconnected appears on the video screen during OSD Pro startup Solution This message indicates that the Guardian Expander is not detected by the system Check your connections on the Guardian expander and read further troubleshooting steps below Issue Guardian does not seem to be working correctly and the Guardian s status LED IS flashing rapidly Solution Make sure you have updated the OSD Pro eLogger and Guardian firmware as described above Issue Guardian does not seem to be working correctly and the Guardian s status LED IS NOT flashing rapidly Solution Make sure that the Guardian is connected correctl
18. ithin the area defined by Center Stick Tolerance Box making it easier to do aerobatic maneuvers Note that stabilization will be reduced or disabled when your sticks are not centered See Center Stick Only Stabilization e Center Stick Box Size 1 10 10 Defines the size of the Center Stick Box used by Center Stick Only Stabilization Small values make the area smaller and vice versa See Center Stick Only Stabilization Select Items to be Displayed Menu Servo Deflections Display This turns on Servo Deflections display which is useful for initial Guardian testing Artificial Horizon Line This turns on the AHI display which is also useful for Guardian setup and testing as well as in normal flight Trimming It is recommended that the airplane be trimmed for level flight before running the Servo Analysis Wizard This ensures that the Guardian Stabilizer will also be trimmed If a change in trim occurs once Stabilization has been configured make sure to execute the Reset Cruise Sticks Throtl to inform the OSD Pro of your change Remember that your throttle needs to be in the Cruise position the throttle position for level flight if the RTH feature is enabled Copyright 2011 Eagle Tree Systems LLC 3 http www eagletreesystems com Guardian Configuration Before you can fly for the first time it is necessary to tell the Guardian a few things about your model These settings are made by using the
19. l flight e Stabilizer Overall Gain 0 10 8 This scales the Pitch and Roll gains When set to 10 both Pitch and Roll will be very strongly stabilized When set to 0 all stabilization will be disabled This setting is overridden by the Aux2 input on the OSD Pro if the Menu Navigation Switch is configured for 3 Position or None and a valid servo signal is present on Aux2 If RTH is engaged the menu s Stabilization Overall Gain will be used See Stabilization Master Gain Knob section for more information Max Stab Pitch Roll Normal 0 90 50 The maximum attitudes pitch angle or bank angle that the airplane is allowed to maneuver to in Stabilization mode Max Stab Pitch Roll RTH 0 90 35 The maximum attitudes pitch angle or bank angle that the airplane is allowed to maneuver to when RTH is Engaged Stabilizer Responsiveness 1 10 7 How responsive you want your Fly By Wire to be with your model A high value will provide very fast response but could accidentally stall your model on takeoff if the control stick is moved too quickly A low value will yield a very smooth flight e Enable Heading Hold Off Locks onto your current heading and trims your plane to fly that heading until the stick is moved from its centered position See Heading Hold section for more information Center Stick Stabilize Only Off This advanced feature enables Guardian Stabilization only when the control stick is centered w
20. m their airplane prefer to disable the stabilizer until they need it for crash avoidance or just to take a short break without needing to land Center Stick Only Stabilization allows for a quick return to stabilized flight at any time by letting go of the control stick It can be enabled in the Configure Guardian Stabilizer menu After turning on this feature choose the size of the Center Stick Box by adjusting the Center Stick Box Size Choosing 1 will size the box to 10 of your control stick movement range best for 3D flight while 10 will cover the entire physical range of your control stick smoother turns Moving the control stick away from its centered position will decrease your Overall Gain until it reaches zero at the edge of the Center Stick Box as illustrated in Figure 1 oa Moving the control stick outside the Center Stick Box will accomplish the same as turning your Overall rall Gain vs Stick Position within Copyright 2011 Eagle Tree Systems LLC 5 Center Stick Box Gain Knob to 0 Bringing the stick back to center will bring the Overall Gain back to its original value set either by the Stabilizer Overall Gain parameter or by the Aux2 servo input as explained in the section Stabilization Master Gain Knob IMPORTANT Remember that when Center Stick stabilization is enabled moving or trimming your control stick will reduce stabilization including during takeoff or hand launch After
21. o supplies un mixed Aileron Elevator signals Mixed inputs to the OSD Pro are not supported with Guardian Stabilization enabled Note that the OSD Pro supports mixed elevon inputs when stabilization is disabled but requires unmixed inputs when stabilization is enabled to provide the best stabilization experience 4 Enable Stabilization by setting the Stabilization Elevn Mixing On option in the Radio Control Configuration menu to Yes Warning Never turn this option off or on during flight if you have an elevon model since the mixing mode will change Adjust the stabilization gain setting instead 5 Orient your model as it would be during level flight If the Artificial Horizon display is not centered on the Home indicator or is tilted click Reset Level Pitch and Roll This step will minimize the impact of minor mounting errors with your Guardian 6 Configure the Max Stab Pitch Roll Normal angles that the Guardian will allow your airplane to attain For greater maneuverability set these values to 60 degrees For easier flight behavior set them to around 40 degrees Warning Setting these values to greater than 60 degrees will result in very responsive flight characteristics from your airframe Going into maneuvers that your airframe is incapable of sustaining will still result in a stall Additionally setting the max angles too low may make your airplane difficult to turn 7 If you will be using the Return to Home featu
22. old feature only engages when your Roll command is very close to level flight Less than 15 stick deflection Limited Warranty Eagle Tree Systems LLC warrants the Guardian to be free from defects in materials and workmanship for a period of one 1 year from the date of original purchase This warranty is nontransferable If your unit requires warranty service during this period we will replace or repair it at our option Shipping cost to us is your responsibility To obtain warranty service email support eagletreesystems com for further instructions This limited warranty does not cover The Software See the Software license agreement for more information on Software restrictions Problems that result from o External causes such as accident abuse misuse or problems with electrical power o Servicing not authorized by us o Usage that is not in accordance with product instructions o Failure to follow the product instructions THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE OR JURISDICTION TO JURISDICTION OUR RESPONSIBILITY FOR MALFUNCITONS AND DEFECTS IN HARDWARE IS LIMITED TO REPAIR AND REPLACEMENT AS SET FORTH IN THIS WARRANTY STATEMENT ALL EXPRESS AND IMPLIED WARRANTIES FOR THE PRODUCT INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED IN TIME TO THE TERM OF THE LIMITED
23. re adjust the RTH Max Pitch Roll angles These parameters act the same as the Stabilizer Pitch Roll angles but are only used for limiting the Return to Home It is recommended that these values be around 25 degrees depending on user preference airframe stability and wind conditions Once again a larger angle will result in a more maneuverable RTH with a smaller turn radius but may result in oscillations depending on the RTH gain values Warning A smaller number will result in smooth RTH behavior but may prevent your airframe from returning in strong wind conditions or if the Guardian is mounted improperly It is recommended that you test RTH after changing these values 8 It is recommended that your Safety Mode RTH gain settings be returned to their default values if you have changed them in the past when flying without the Guardian When the Guardian is properly configured most airframes should work with the default RTH gains But it may still be necessary to adjust the RTH settings with the Guardian installed Note If the RTH does not turn quickly enough increase the Max Stab Roll RTH value before changing the RTH gains Do not exceed 35 degrees For further information see the RTH tuning section of the OSD Pro manual 9 The Stabilizer Pitch Roll and Overall gains can be left at their default values of 5 5 and 8 respectively You will tune these gains later The Servo Analysis Wizard Since Guardian Stabilization interprets your s
24. tick movements as attitude commands rather than direct servo deflections it is important to tell it how far your RC controller s sticks move in the pitch roll axes At the same time the Guardian needs to know the trim conditions of your plane as well as the centered position of your control stick The Servo Analysis Wizard figures this out for you When requested to Set Sticks for level flight your control stick should be centered trimmed for level flight with stabilization turned down and your throttle set to its cruise level The throttle levels are not required by the Guardian but are required for Return to Home Please see the OSD Pro manual for information regarding the throttle failsafe features of the Servo Analysis Wizard When asked to Mov Rudder Aileron Stick Left make sure to assert maximum servo deflection on your RC controller The same should be done when asked to Mov Elev TX STICK Back Climb These steps tell your OSD Pro the maximum servo deflections allowed for Guardian Stabilization If the stick is not moved to its maximum extents for this portion of the wizard your control commands may be clipped impacting performance and stability Note After trimming your airplane on your RC controller it is important to run the Reset Cruise Sticks Throtl to inform the controller of the change otherwise Heading Hold and Center Stick Only Stabilization may be impacted Reset Cruise Sticks Throtl It can be cumbersome
25. to re run the Servo Analysis Wizard after changing the trim of your airplane To let your OSD Pro know about changes to trim it is important to run the Reset Cruise Sticks Throtl command This resets the center position of your control stick as well as the cruise position of your throttle ensuring that features like Heading Hold and Center Stick Only Stabilization work optimally Tuning Stabilization Gains Stabilization Theory The Guardian Stabilizer works by measuring the orientation of your model airplane relative to the local direction of Earth s gravity In addition it interprets pitch and roll attitudes commanded by the servo signals received through your elevator and aileron channels respectively Copyright 2011 Eagle Tree Systems LLC 4 http www eagletreesystems com With this information it is able to determine the error between your requested flight attitude and your plane s true orientation By passing this error through a controller algorithm and sending it as servo commands through the elevator and aileron outputs on your OSD Pro the Guardian can turn your squirrely model into a smooth flying wing on rails Each axis has a separate control gain used to tune stabilization These are defined by Stabilizer Pitch Gain Stabilizer Roll Gain and Stabilizer Overall Gain The Pitch and Roll Gains are scaled by the Overall Gain to provide individual axis tuning while also providing On The Fly adjustment dependin
26. trimming remember to execute the Reset Cruise Sticks Throtl command to ensure full stabilization Heading Hold Recommended When the Guardian tries to stabilize an un trimmed or off balance airframe a gradual turn can occur even if level flight is commanded To counteract this it is recommended to enable the Heading Hold feature by ensuring the Stabilizer Turn Gain in the Configure Guardian Stabilizer menu is set to its default value of 5 and setting Enable Heading Hold to Yes Once enabled Heading Hold keeps track of your current heading and when your control stick s roll axis becomes centered will lock onto that heading As soon as the control stick is moved to command any roll the current heading will be reset The pitch axis can still be commanded with Heading Hold enabled to allow for a heading locked climb or descent At this time the Heading Hold s directional lock does not use GPS so a small amount of drift over time can occur Additionally for safety reasons the Heading Hold will not track yaw movements beyond 45 degrees from the locked heading If the plane yaws further than this the locked heading will be automatically adjusted so as to be within 45 degrees of the current heading While the default of 5 for Stabilizer Turn Gain should work for most airframes a higher number may be needed if the airplane does not track closely enough due to trim issues If when flying at normal
27. ur question more quickly from our forum above since many other Eagle Tree customers also monitor the forum Note that when you create a support ticket you will be emailed a link that will let you check the status of the ticket If you do not receive the email this most likely means that a spam filter is intercepting emails from Eagle Tree Also Eagle Tree greatly values your feedback on how we can improve our products To leave us feedback for a new feature request or improvement either post the feedback on our support thread above create a support ticket with your feedback or send feedback at http www eagletreesystems com Feature feature html Connection and Mounting Connecting the Guardian to the eLogger V4 or V3 The Guardian plugs into the LCD OSD or LCD TX port of your eLogger V4 or V3 as shown in Figure 3 or it can connect to the 4 pin expansion port of the OSD Pro If you Epaian have a PowerPanel or other MicroSensors those can daisy chain connect to the pins on the Stabilization side of your Guardian with the polarity as indicated on the Guardian label Note that the Guardian can connect anywhere in the chain of sensors Once the Guardian has been powered its status light should begin blinking rapidly to indicate correct operation To eLogger eLogger V3 V4 Connection Connecting the Servos Connect your receiver s Aileron output or Rudder receiver output if the plane does not have Ailerons and th
28. y from the motor wires and any other sources of vibration or electromagnetic interference Important Differences in OSD Pro Configuration when using Stabilization There are a few differences in how you configure the OSD Pro when stabilization is enabled vs disabled These are described elsewhere in the document in more detail When running the Servo Analysis Wizard full elevator and aileron stick deflection should be given rather than partial stick deflection Partial stick deflection is recommended when stabilization is disabled to limit RTH servo deflections If your model has both ailerons and a rudder the ailerons should be routed through the OSD Pro when stabilization is turned on rather than rudder Copyright 2011 Eagle Tree Systems LLC 2 http www eagletreesystems com In Elevon mode with stabilization enabled the Guardian performs the servo mixing so you must turn off mixing in your radio But if you disable stabilization the OSD Pro will again expect mixed inputs from your radio Never turn stabilization off or on during flight if you have an elevon model Use the stabilization gain setting instead If you have previously configured RTH with your OSD Pro it is recommended that you return all RTH gains limits to their default values when stabilization is enabled Note that you may still need to tune the RTH gains limits with the Guardian installed but the defaults should work well with most models Guardian Stab
29. y to the LCD TX line on your eLogger and that your eLogger is powered If the Guardian s status LED is blinking three times in a repeating fashion then your unit has likely been damaged Issue Servo deflections are limited compared to when Stabilization is disabled Solution Run the Servo Analysis Wizard under the Configure Radio Control menu Make sure to assert full stick deflections when asked to turn and climb during the wizard See the section on the Servo Analysis Wizard under Guardian Stabilization Issue Elevator or ailerons are unresponsive to radio commands Solution Make sure you have run the Servo Analysis Wizard after installing Guardian Issue Servos are responding to control inputs but not to movements of the airplane Solution Ensure that the Guardian s 4 pin cable is connected as described in the Connection and Mounting section above Check that Stabilizaton Elevn Mixing On is set to YES under the Configure Radio Control menu Confirm that the Pitch Roll and Overall Gains are set to their default values If you are using the Aux2 input for Overall Gain adjustment ensure that your knob switch or slider is positioned to enable stabilization Issue Heading Hold does not appear to be working or is drifting more than a few degrees per second Solution If you have trimmed your airplane recently you may need to execute the Reset Cruise Sticks Throtl command under Configure Radio Control The Heading H
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