MGL Avionics User Forum

unable to identify or calibrate servo and have lost my preflight check list. I have it set on internal autopilot and flight director in the setup page but it will not Identify the servo when I try find it. I must have accidently set it to external auto pilot but I don't know how to undo the setting. any help will be appreciated.

I forgot to mention this is a challenger screen and EFIS System

The process of identifying a servo means assigning it a function - when it is new and you switch it on (connected to the EFIS) it's LED should be solid on.
You will have only ONE servo connected - you then "identify" it as either a bank or pitch servo. The moment you do that the LED starts to flash indicating that it now knows what it is.
You can reidentify a servo that has already been identified (for example you want to turn a bank servo into a pitch servo).
Make sure in all cases when you do this procedure that only one servo is connected or powered.
If the message comes back that it failed - usually do not worry about it too much - it most likely worked - you can see very easily if it is working by looking at the reported position (in the left/right or up/down servo limit calibration) if that changes as you move the arm all is well.

If it does not work check your CAN bus wiring to the servos - termination resistors correct and in place ? Does the servo have power ?

The servo is working, but the calibration process will not work, and the preflight checklist that should come up in the main menu is gone. I have had this system working for 5 years, but I had a servo go bad. I then started working on it and found the servo to be bad by swapping the pitch servo with the roll servo. I only have one servo installed, and the system can see it. It will work in flight, but the calibration setup and the preflight test are gone.

This started when I accidentally changed the internal autopilot to external. I have set it back to Flight director + internal Autopilot. Now, when I go to identify it, the window that should pop up and say "Be sure only one servo is connected" does not show up. The setup function has stopped working. I have a servo hooked up, and I can watch the position move with the servo arm movement. It tracks just like it is supposed to, so I know it is functioning. When it moves, the red light flashes while it is moving and goes out when it reaches its set point.

I think it is something in the System setup Menu that does not recognize the internal autopilot. The menu is "Autopilot setup (Internal and ARINC AP)". I do not have ARINC, so maybe that is why it is confused.

I have found that the system will identify a servo after all so I know it's trying to work. I am pretty sure its a software problem or a switch setting.
Can anyone tell me what settings I will loose if I try the factory reset? Will I have to reprogram every setting again?

Well, I need to know what to do when I did the factory reset. after I reset it I cant put the settings back in. All I have is a blank page.
I guess I need to download the basic files to get it started again. what file name should I look for and where do I download it .

After a little more research I was able to download the BIN files and got the setup back.
I still would like to know if there is anything that can be done with the VSI. My VSI will bounce up 50 ft. and then down 30 ft. It does this while setting on the ground with the plane shut off. The auto pilot has a hard time flying level trying to adjust to the movement.
Any ideas why this is happening?
Thanks