HITEC HFP-25 - Manual (Page 2)

1. Reset:
The reset function will set your servo back to the factory default settings.
This should be done before programming your servo for the first time.
Select High or Normal Resolution
Traditionally the servos used for RC radio systems and have approximately 120 degrees of travel
angle.
Also the Hitec HS-7XXX servos are adjusted 120 degrees as default setting; However, for some
applications, a wider travel angle is desired. We heard the customers’ wants, and made our
servos to thavel up to 180 dogreesfor RC Applications and adjusted the maximum travel
angle within 180 degrees using EPAneuFS function.
a. To reset the servo press the INPUT button, at this point the programmer will search for
the settings; up down will appear on the screen after it finishes searching.
b. To reset the servo to factory default you will need to push the "UP/R" and "DN/R" buttons at
the same time.
c. After completion the screen will read “Reset Success." Now the servo is set to factory default
settings and can be used without further programming, or is now ready for further
programming with the HFP-20.
So you can choose one between high and low resolution for your application.
That is, maximum travel angle is 120 degrees in High Resolution mode, and 180 degrees in
Low Resolution mode.
3. OLP Rate (Overload Protection Rate) (For HS-7XXX Digital servo series and HS-5055,
5056, 5065, 5082 and 5085MG Digital servo only)
This function allows you to set the amount of torque reduction to protect the motor from stress
that would cause it to burn-up.
What is Overload Protection Rate?
If the servo is overloaded, and can't reach the destination position as it would be directed to do,
the overload protection system is activated. In this case, the servo amp will reduce its output
power by the value you set from the maximum power.
Increasing the overload protection rate is the same as limiting the output power, or torque.
That is, if you select a value of 10% by adjusting the knob, the servo amp will reduce the power
by 10% and output only 90% of the maximum torque in overloaded situation.
You can set the value between 10% and 50%. If you select "Off" in this mode,
overload protection will not be activated, and the servo will always produce maximum torque.
When the overload is released, the protection mode is terminated and the servo will work normally.
a. Press the INPUT button to enter the mode.
b. To select Normal resolution, push the UP/R button. To choose high resolution,
push the DN/R button.
c. Press INPUT to save and exit.
5
7 8
c
b
a
2. RSLTN (Resolution) (For HS-7XXX Digital servo series only)
OLP OFF
OLP ON
Normal
180 degree travel angle but lower resolution
120 degree travel angle with finer resolution
Normal Resolution
High Resolution:
6
Increasing the travel angle will decrease the servos’ resolution.
There is a finite number of "steps of resolution" and widening the angle of travel will
increase the distance of each step.
Please note
10
20
10
20
20
5
Reduced output at preset
rate (50%) when overload is
detected to prevenant damage.
when overload stresses
a servo more than
its max torgue limit.
Full torque even against
the overload which can
cause severe damage to
a servo
! WARNING !
REMOVE ALL CONTROL LINKAGES FROM THE SERVO BEFORE THE RESET PROCESS.
A very few early Hitec digital servo models will "lock" to one side and appear to die when
the reset function is used; however, the servo has been reset and is ready for programming.
Therefore, simply unplug the servo from HFP-25 and manually twist the servo horn to the
approximant "center position".
b
a
! Warning on Early Production Hitec Digital Servos!