Owner's manual

HM4050 AVCS Heading Lock Gyro Fast Setup Guide
HMXM1015
Thank you for purchasing the Heli-Max HM4050 Heading
Lock Gyro. You can use this fast setup guide to get you
going but please take the time to read the full manual
at Heli-Max.com. There you will learn all the bene ts
this gyro o ers.
WARNING: In this step it is best to unplug the
motor or move the motor pinion gear away from
the main gear or you might risk injury.
Installing the Gyro
Install the rudder servo following the helicopter
manufacturer’s instructions. Note: A more detailed
servo installation is explained on heli-max.com.
Installation: Once your helicopter is fully assembled
and you are ready to install the gyro, take time to verify
that the tail rotor’s pitch compensation is the correct
direction. To do this, simply plug the rudder servo into
channel 4 of your receiver. Turn on the transmitter
and then power up the helicopter. Moving the left
stick (rudder stick) to the left should cause the trailing
edge of the tail blades to follow the stick movement.
If it does not, use your transmitter’s servo reversing
switch to change it.
To install the Gyro select an open area on the helicopter
away from the motor and motor controller. Your
installation position should be with the gyro in-line
with the main shaft. Typically, most gyros are installed
on the frame set over the tail boom mounting area.
The orientation of the gyro’s sensor is such that the label
of the gyro faces up. Clean the area with an alcohol pad
and attach the gyro using the supplied foam tape. Press
down  rmly to secure the gyro. To be consistent, mount
the gyro so the face plate wording is legible from the
back of the helicopter.
Attach your rudder servo connector to the open female
connector leading from the gyro.
Attach the 3 wire male connector (rudder) from the
gyro to channel 4 of your receiver (Futaba®). Also, plug
in the one wire plug from the gyro (gain) in to channel
5 (Futaba), making sure the yellow wire is aligned with
the signal wire of the other servo plugs.
Gyro Setup
Turn on your transmitter and enter your radio’s menu
and check to make sure REVO MIX (Revolution Mixing)
is disabled. Plug the main power battery into the
controller. Again, it is best to unplug the motor or
move the motor pinion gear away from the main
gear or you might risk injury. Wait at least 5 seconds
before moving the helicopter. This is important as the
gyro is reading its current position and should not be
disrupted at this time. Move the rudder stick left and
right. Adjust the LIMIT dial so the tail pitch slider does
not bottom out on the tail case or tail hub. Start at 50
percent and work the dial either a lesser percentage or
larger percentage to complete the adjustment.
Adjust the DIR switch so the gyro provides the proper
compensation direction. To check this, grasp the
helicopter holding the tail away from you. Swing or
rotate the helicopter left to right. The trailing edge of
the tail blades should move the same direction as your
rotation direction.
Gyro Usage
Flying using “LOCAL” mode
(SENS ADJ Switch “ON”)
If you choose to use the gyro in local mode it will
automatically be in heading hold. It’s important to note
1-Light Emitting Diode (LED)
The LED will glow green anytime the gyro is
powered and operating.
2-Limit Dial (LIMIT)
This dial adjusts the rudder servo travel. 100% =
maximum travel.
3-Sensing Dial (SENS)
This dial is used to change the delay time between
the gyro and the servo. NOTE: With the GYRO
SENS ADJ switch set to (ON) this dial becomes
your GAIN adjustment (see below).
4-SENS ADJ
This switch is used to change the gyro from being
able to adjust “gain” from the transmitter (O ) or
adjust the gain from the SENS dial (On).
5-Direction (DIR)
This switch is used to change the gyro’s compensation
direction. NOTE: Incorrectly setting the direction
switch can cause an unsafe situation.
6-Digital Servo (DS)
This switch is used to select between digital or
analog servos.
Understanding Your Gyro
© 2012 Hobbico®, Inc. All rights reserved.
®