HITEC HFP-25 User Manual
Page 3
a. Press the INPUT button to enter, and the programmer will search for the settings;
X:Y will appear with X being the current setting and Y is adjustable from Off to 50%.
b. Use the adjustable knob to select Y, the reduction rate.
c. Press the M button to change the setting.
d. Press INPUT to save and exit.
4. DB Width (Dead Band Width:)
This feature will allow you to change the width of the center position between 3
Ɇs and 48Ɇs.
What is dead band width and why do I want to program it?
The dead band width is configured in microseconds or "
Ɇs".
It is the "space" the center position takes up. The larger
the number, the wider the dead band will be.
Large planes and surface vehicles often will "gang"
several servos together on one control surface.
It is important that these servos have
matched dead band widths to avoid
having them "fight" each other
at the center position.
What is the fail-safe function and how is it used?
Traditionally a PCM radio system would allow the user to program a "fail-safe" position that selected
servos would revert to if the plane or surface vehicle suffered a loss of signal from the transmitter.
With your programmer and a Hitec digital servo you can program a fail-safe point into the servo
and have the benefits of fail-safe without the expense and drawbacks associated with PCM
technology.
Suggested uses would include dropping the throttle servo to idle; slight deflections from the
neutral point for aircraft ailerons and or elevators. The following will arm or disarm the fail-safe
parameters you can program in step 6.
7. FS On/Off (Fail-safe):
Turn the fail-safe function on or off
a. To enter the mode press the INPUT button and the HFP-25 will search for the settings;
X:Y will appear with “X” being the current setting and “Y” is adjustable value from 1-16.
The value of "1" is about 3μs and is the smallest dead band width setting available.
b. Use the knob to change “Y” (the new value).
*"1" is the tightest dead band width setting and provides the best centering.
c. Press "M" to set the data.
d. Press INPUT to save and exit
5. Rotation:(Servo reverse)
Select the servos rotation from either clockwise or counterclockwise.
a. To enter press the mode the INPUT button and the programmer will search for the settings;
ccw or cw will appear.
b. Press UP/L to set the servo to cw (clockwise).
c. Press DN/R to set the servo to ccw (counterclockwise).
d. Press INPUT to save and exit.
a. Press the INPUT button to enter the mode. HFP-25 will search for its current setting;
it will show you if the fail-safe feature is turned "on" or "off".
b. To turn the fail-safe feature "on," push the DN/R button. To turn it "off", push the UP/R button.
*The factory default setting is always “off”.
c. Press INPUT to save and exit.
d. Go to the EPAneuFS screen to set the fail-safe position. (See step 6)
6. Speed:
The programmer allows you to slow the rotation speed of the digital servo only.
While the "X" value may show "40" the actual speed value could be less, based on
the above chart.
so drop the "Y" value below the "actual maximum speed" as shown on the above
chart to slow the servo down.
a. press the INPUT button to enter the mode.
X:Y will appear with “X” being the default speed value, and "Y" being the adjustable
speed
value.
“1” is being the slowest and the servos default value "64" being the fastest.
*The factory default value is always the servos’ fastest possible speed.
b. Use the knob to adjust the value “Y”
c. Press "M" to set the value.
d. Press INPUT to save and exit
* This function is used for HS-7XXX servo series and HS-5055, 5056, 5065, 5082,
and 5085MG only. Factory default is off.
*NOTE
9
10
11
12
Model Number
Actual max speed
No speed change zone
HS-5625MG
22
22-64
HS-5645MG
12
12-64
HS-5925MG
16
16-64
HS-5945MG
10
10-64
HS-5735MG
10
10-64
Tightest
Loosest
1
1
d
a
16
16
b
b
b
Center Position Allawance
CW
CCW
d
c
b
a
Digital servos built prior to October 2001 will always show a default value of "40".
The actual speed can be between 28 and 40 based on the following chart:
d
c
a
c
b
b
a
! Additional Warning on Early Production Digital Servos!
d
c
a
c