ACE RC
TG7200
HEADING LOCK GYRO
INSTRUCTION MANUAL
Product no. 8079
INTRODUCTION
Upgrade from the TG7000, we introduce the new heading lock gyro TG7200 now is compatible with a
2.4GHz radio system as well as capable to operate in a high-voltage DC system. Use of the latest SMM（Silicon
Micro Machine） sensor eliminates the rudder trim changes in flight and provides the unmatched performance. It is perfect for electric and nitro powered R/C helicopter. For beginner, it will greatly reduce the learning process; for experts, it will provide the performance you require.
FEATURES
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Compatible with a High-Voltage DC system(4.8~8.4V)
Compatible with a 2.4GHz radio system
Heading lock mode and normal mode
SMM gyro sensor
Remote-controlled gain
Analog/digital servo compatible
Suitable for a 760/1520μs digital servo
Separated end point adjustment for left and right servo traveling limit
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Simple wire connection for easy installation
FUNCTION
AS/DS switch
TG7200 is compatible with analog servo as well as digital servo. The AS means Analog Servo while the
DS means Digital Servo. Be sure to set the switch at AS position when using an analog servo, or the servo will be destroyed.
Gyro operating direction
Switch the gyro operating direction. This setting depends mostly on the helicopter, servo, and the installation position of the gyro itself. Wrong setting will result in a dangerous situation.
End point adjustment dial
This is the unique feature of TG7200.
You can adjust the left and right rudder servo traveling limit independently. Move the rudder stick to the right, you can adjust the right limit with the R dial. Move the rudder stick to the left, you can adjust the left limit with the L dial. Make sure that the servo traveling range is no greater than the linkage.
Rudder servo connector
It should be connected to the rudder servo.
SPECIFICATIONS
Product Name
Control
Sensor
Voltage
Operation Temperature
Dimension(mm)
Weight(g)
TG7200
Digital Proportional Integration Control
SMM Gyroscope
DC 4.8~8.4V
-10 ~ 45℃
25.9 × 24.9 × 20.4
23.5
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INSTALLATION
Before using the double-sided foam, be sure to clean the bottom of the gyro and the fuselage where the gyro will be attached.
Attach the gyro, foam and the metal plate as shown.
One foam tape should be between the gyro and the plate, and the other two pieces are under the plate.
Install the gyro so that it’s bottom is perpendicular to the main shaft axis.
Fuselage of Helicoptor
CAUTION
Install the TG7200 at least 10cm from the drive motor when using with an electric helicopter.
SERVO SELECTION
TG7200 is suitable for analog and digital rudder servos.
In addition, you can choose digital 1520μs and 760 μs rudder servos as well.
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For analog servo:
1.Set the middle switch to AS position that means
Analog Servo.
2.Set the right switch to 1520μs position (Do not
choose 760μs with an analog servo).
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For 1520μs digital servo:
1. Set the middle switch to DS position.
2. Set the right switch to 1520μs position.
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For 760μs digital servo:
1. Set the middle switch to DS position.
2. Set the right switch to 760μs position.
1520/760μs switch
TG7200 is suitable for 1520μs and 760μs digital rudder servos. If you need the best performance out of the gyro, you can use a 760μs digital high speed servo.
When you use a normal digital servo, set the switch at
1520μs position. If you use a special 760μs digital servo, set the switch at 760μs position.
WARNING
While using an analog servo, only 1520μs can be chosen.
Choosing AS & 760μs may cause unexpected errors.
High brightness LED light
Indicates the status of the TG7200.
Off
Red LED light
Green LED light
Indicates that the power is off.
Heading lock mode
Normal mode
Gyro gain connector
This connector is used to adjust the gyro gain and switch between the heading lock mode and normal mode.
Connect to receiver sensitivity switching channel.
Rudder input connector
This connector is supposed to be connected to the rudder channel of the receiver.
SETTING AND ADJUSTMENT
1. Set the transmitter first. The “trim” and “sub trim” of rudder should be at neutral position. Then check if the DS/AS switch and the1520/760μs switch on the gyro are in correct position. Set both of the EPA dials at around 70~80% as the initial setting.
2. Suppose the gyro gain connector is connected to the
CH5 of the receiver, it is recommended to adjust the
“ATV” of CH5 at 75~80% as the initial setting.
3. Turn on the transmitter then turn on the power of gyro (shared with the receiver), do not move the helicopter at this moment.
4. The rudder servo will be set in the neutral position first and then the red LED will light up indicating the heading lock mode.
5. The gyro is in normal mode if the green LED lights instead of the red one. Please reverse the CH5 and repeat the step3 and step4 again. (Be sure to turn on the gyro in heading lock mode)
6. Fit the servo arm temporarily, check the gyro and servo direction: a. While giving the right rudder control, the servo arm should move toward the nose of the helicopter. b. While rotating the helicopter with your hand counterclockwise, the servo arm should move toward the nose of the helicopter.
Tail
Rudder Servo
Nose
NOTE
Take Thunder Tiger Raptor series helicopter for example. It may differ from heli to heli.
7. Reset the power and remain the helicopter still, fit
the servo arm as shown. The servo arm should be perpendicular to the tail control linkage rod. If can’t be, it is recommended to try another servo arm instead of adjusting the “trim” or “sub trim”.
Rudder Servo
FLIGHT ADJUSTMENT
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Gyro Gain
If the steps above are correctly executed, the gyro will be in charge of the tail control under heading lock mode. Even in crosswind situation, the tail will remain the position.
The gyro gain differs. The higher speed the rudder servo is, the higher the gyro gain will be. On the contrary, the tail efficiency of the helicopter itself increases when the head speed of the helicopter goes up, so the gyro gain should be reduced.
As a result, use gyro gain of 75~80% when hovering and 70~75% during aerobatics. Increase the gyro gain before the tail begins to hunt. It will reduce the life of the servo if the gain is too high.
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Pirouette Adjustment
The pirouetting rate of the helicopter is related to the gyro gain and the rudder ATV (or D/R) setting.
Increase the ATV (or D/R) will speed up the pirouetting rate. Under the same ATV (or D/R value) setting, the higher the gyro gain is, the slower the pirouetting rate will be. It is recommended to decide the gyro gain first, and then adjust the pirouetting to the rate you want. It is suggested to use the EXP function of the rudder to make the control smoother and more precise.
WARNING
Make sure every part on the helicopter is installed very well if you want the helicopter to pirouette at a very high speed, or something will be flung out such as the gyro itself due to the centrifugal force.
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Vibration Elimination
TG7200 uses the SMM sensor with very high sensitivity. If there is a certain amount of vibration during flight, it will diminish the performance of the gyro. So please take this issue very seriously and take the following suggestion into consideration.
1. Use the provided foam only and make it very spongy to be the damping.
2. Be sure to use the metal plate between the gyro and the helicopter.
3. Eliminate the source of vibration from the helicopter.
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CAUTION
Always use the provided foam to install the gyro.
Mount the gyro so that there is no object will touch it.
Turn on the gyro under heading lock mode and never
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move the helicopter until the red LED stops flashing.
Don’t use the “trim” and “sub trim” of rudder.
Avoid sudden changes of temperature.
Disable the tail compensation (revolution mixing) function when using the heading lock mode.
OPTIONAL PARTS
8. While the servo arm is perpendicular to the tail control rod, the tail blades pitch should be at 0 degree or a little offset to the right rudder as shown.
(with clockwise rotation rotor)
AC2214
Metal Plate
9. Move the rudder stick to the left and right, adjust and check the linkage. Make sure there is no binding on both sides.
10. Make sure both of the EPA dials should be around
75% or more, or the servo arm is too long that the gyro gain can’t be maximized. Shorten the servo arm and increase the EPA, this will maximize the performance of the gyro.
11. The difference of right and left EPA should be less than 5%.
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