JR XP7202 / Spektrum DX-7

The Super Simple Set-Up (provided by Paul Beard)

Calibration procedure:

AUX on TJ/RM plugged into = AUX2(channel 7)on Spektrum RX

Get your throttle ATV's as close to 100/100 as possible.

AUX2 ATV's = 100/100

Go to system menu(INPUT SELECT)and set AUX2 = AUX2 (not INH or Gyro) and GEAR = GYRO

(Your Gyro Gain needs to be plugged into CH5 now.)

Norm throttle curves 0%-100%

Throttle stick and trim at low and AUX2 switch up.

Turn on heli and wait for the quick flash of the Yellow LED on the TJ/RM after the Spektrum Rx initializes and then flip AUX2 switch to down position and wait 2 seconds. You will get the flashing green LED indicating calibration mode. Go to high stick(yellow LED) and then back to low stick(green LED again). Flip AUX2 switch back to high and green LED will go out. Calibration done.

Change System Menu(INPUT SELECT): AUX= INH

PROG.MIX1
AUX2->AUX2
RATE: +76% (this is just a starting value and you will change it to get desired head speed)
-70% (same with this one)
SW: F-S12
OFFSET: 0

This gives Governor off in normal mode and enabled in ST1 and ST2.
AUX2 switch down (1) slow rpm and up (0) high rpm. (70% and 76% in the example)

If that one is too easy, here's another way:

OPTION 1, Gear channel sets RPM

The throttle connects to THRO channel (1)

The auxiliary connects to GEAR channel (5)

ATV setup [TRVL ADJ]

Setup the throttle servo and linkage as close to +/- 100% ATV as possible.

Select the GEAR channel to +100% and -100%

Hint: You can observe the GEAR range on the [MONIT] screen

Hint: You can use AUX2 if you have the gyro setup to use GEAR, just substitute AUX2 where ever it says "GEAR"

The system is now ready for calibration. Calibration is explained above

The target rotor speed can be calculated using the ATV Calculator

 

Example 1): 2 speed setup:

Gear ratio = 9.3:1

ATV- = 15%, ATV+ = 53%

 

GEAR Sw Posn             Rotor RPM

down   .................................1200

up      ..................................1500

 

Example 2): 1 speed setup and disable:

Gear ratio = 9.3:1

ATV- = 0%, ATV+ = 53%

 

GEAR Sw Posn             Rotor RPM

down ..................................Disabled

up ........................................1500

 

Example 3): Flight Mode Mixing:

        Set the throttle curves in Flight modes 1 and 2 above the throttle priority level.

Set the GEAR switch to the down position

Set the GEAR ATV [TRVL ADJ] to -0%

Set the GEAR switch to the up position

Set the GEAR ATV [TRVL ADJ] to +100%

[PROG.Mix3] - This mix disables the Governor in flight mode 'N'

GEAR->GEAR

RATE:->-100%

              0%

SW: ON, Offset 0

[PROG.Mix2] - This mix sets the target rpm to 1200rpm (15%) in flight mode '1'

GEAR->GEAR

RATE:->-15%

              0%

SW: F-S12

[PROG.Mix1] - This mix sets the target rpm to 1500 (53% - 15% see note below) in flight mode '2'

GEAR->GEAR

RATE:->-38%

              0%

SW: F-2

 

          Note: The Mix1 rate is 53 (1500rpm) - 15 (1200rpm) = 38%

    

GEAR Sw Posn         Flight Mode     Rotor RPM

down..............................N                   Disabled

                                1                    Disabled

                                2                    Disabled

up ..................................N                   Disabled

                                1                     1200 rpm

                                2                    1500rpm

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