Spektrum BEAST X AR7210BX Mode D'emploi page 30

EN
Status-LED
OFF
Purple Flashing
Purple Solid
Red Flashing
Red Solid
Blue Flashing
Blue Solid
The motor poles of an electric motor can be determined by counting the number of
magnets built into the motor housing. Each magnet corresponds to one magnetic pole.
Note that on some motors, pairs of magnets are used rather than one single large magnet.
These pairs together form just one magnetic pole. Refer to your motor datasheet or
consult your local dealer.
To determine the number of magnets that are used for a magnetic RPM sensor in a nitro
helicopter, you can use Menu Point A. Each time a magnet passes the sensor, the
Status-LED lights up Blue, i.e. when you turn the clutch bell by hand. Count how often
the Status-LED lights up during a single rotation. Then this is the divider you have to set
a Menu Point E.
Press the button to save the configuration and to proceed to Menu Point F.
F G H Divider for Main Gear Ratio
The RPM Governor of the Spektrum AR7210BX calculates with the rotor head speed of the
helicopter. So (as shown at Menu Point D) you can set the desired head speed very easily
and the Spektrum AR7210BX will try to maintain this head speed. Thus, the detected rotation
speed of the motor can be converted into rotor head speed. Specify the main gear ratio of the
helicopter at Menu Points F, G and H. Menu Point F sets the number of gear ratio before
the decimal point. Menu Points G and H specify the first two decimal places. Compare the
following table and set the Status-LED to the corresponding color and condition at each Menu
Point so the desired gear ratio will result as a combination of all three menu points. The ratio
can be adjusted in increments of 0.05. Choose the ratio that is the closest for your helicopter
and set the menu points one after the other.
The gear ratio should be specified in the instruction manual for your helicopter. Especially
with electric models it will vary depending on the motor pinion used. For helicopters with a
single-stage gear drive the reduction can be calculated by dividing the number of pinion teeth
from the main gear tooth count.
Example: BLADE 360CFX – Main gear 136 teeth / 12 tooth pinion. Gear ratio ca. 11,35:1.
F – Status-LED solid red, G – Status-LED purple flashing, H – Status-LED red flashing.
Divider
no division
(2 motor poles or 1 magnet**)
2
(4 motor poles or 2 magnets**)
3
(6 motor poles)
4*
(8 motor poles)
5
(10 motor poles)
6
(12 motor poles)
7
(14 motor poles)
** magnets used as signal generator for nitro helis
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*
Factory Setting