How to setup the mode switch for APM/AC2
This tutorial was created using the Futaba 12fg, but keep reading and it may give you some ideas on your radio. If you already have your particular radio figured out, write a tute like this and maybe we can get a collection of them added to the APM/AC2 wiki's.
You will need two spare switches, a 2 position and a 3 position to be able to get all six flight modes for the APM/AC2. We are aiming to get pulse widths of 1165, 1295, 1425, 1555, 1685, and 1815.
If you have a device which can measure pulse width, it is much more convenient than watching numbers scroll on the cli. The pulse-width readout is now conveniently located on the Radio Calibration page of the Planner. Some servo testers can measure what is coming out of the receiver.
1. Start with end points at 100 and subtrim 0 on the gear ch.
2. Go to the AFR screen #2 and set the function to Gear.
3. Put Gear switch in middle the position. Now backup to AFR screen #1 and set the offset to get a pulse of 1490. This is not the normal centre pulse width but is right in the middle of the range we are trying to setup. This could be done with subtrim on other radios.
4. Go to the Prog Mixes screen, pick a mix and set it to Offset, then activate it to get to the next step.
5. You should now be in the setting screens for your chosen mix. Go to screen #5 to assign a switch to use as your secondary mode switch and remember to activate it. I chose SF as it was a 2 position switch.
6. Go to Mix screen #1 and set the function to Gear.
7. Set the secondary mode switch to the rear and Gear switch to centre and adjust Offset Off for a 1425 pulse.
8. Set the secondary mode switch forward and adjust Offset On for a 1555 pulse.
9. Go back to AFR screen #1 and make sure you are still in the Gear function. Put both switches to the rear and adjust Rate B for an 1165 pulse. This can be done with gear endpoints on other radios.
11. That’s it. If you flick through all 6 combinations, it should be pretty close to what the APM/AC2 expects to see. I ended up with 1165, 1296, 1426, 1555, 1684 and 1814.
Here is the file for my complete model. I would suggest using it as a guide only because my switch assignments may not suit you.