Sanwa MT-R RX-493i User Manual page 12

How to Use Each Feature
FAIL SAFE [ F/S ]
● Fail Safe Operation is a feature to keep the servos in a predetermined position for each channel in the
event that the receiver cannot receive a signal from the transmitter. A feature to keep the servos in a
predetermined position for the servo of the throttle channel (2ch) in the event that the battery voltage on
the receiver side of an engine RC car goes below the set voltage is Battery Fail Safe Operation.
● Battery Fail Safe Operation cannot be set when the throttle channel (2ch) is set to FREE/HOLD (*Battery
Fail Safe Operation works only for the throttle channel).
*Don't use Battery Fail Safe Operation for electric RC cars.
1) Select F/S with up and down key and select a channel to set fail safe operation (ST/TH/A1/A2).
2) Enter the set channel and operate by up and down key.
The fail safe mode setting changes in order of
FREE→FS→HOLD.
○Setting Range: FREE/FS(-100～100%)/HOLD
○Default: FREE
FREE (Free Mode)
When thre receiver cannot receive the signal from the transmitter, the signal output to the servo stops and
the servo will be free.
FS (Fail Safe Mode)
When the receiver cannot receive the signal from the transmitter, the servo will be held in the set position.
HOLD(Hold Mode)
The last postion before the signal from the transmitter to the receiver is lost will be held.
*When the receiver can receive the signal from the transmitter again, each mode of FREE/HOLD/FS is
automatically released.
3) Setting the Fail Safe (FS)
Move to the position where the Fail Safe Operation is used. When the position is determined, holding the
Enter key to set the position when the Fail Safe Operation works.
*For safety, we recommend setting the throttle channel on the brake side when setting the Fail Safe.
4) Setting the Battery Fail Safe Operation
After setting the throttle channel position, move the cursor to [B-F/S] to set the voltage.
○Setting Range: OFF, 3.5v ～7.4v
*The Battery Fail Safe Operation is a feature to activate
Fail Safe Operation when the receiver battery voltage belows
to the set voltage on a Nitro car.
Don't use the Battery Fail Safe feature on electric RC cars.
5) Checking the Fail Safe Operation
Turn off the power of the transmitter while
the Fail Safe Operation is set and check
if the servo moves to the position where
the Fail Safe Operation is set.
• About the Fail Safe Operation
IMPORTANT When the Fail Safe feature is on, check the setting of the Fail Safe before operating.
Don't change the setting of the Fail Safe during operation.
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SETTING
F/S Setting
F/S Setting
BATT- F/S Setting
F/S Setting Point
BASE
● Base sets multiple functions all at once such as the Reverse that determines the direction of the servo of
each channel, the speed controller according to a specific RC car, the Sub Trim that adjusts the neutral
position, and the End Point Adjustment [EPA].
REVERSE [ REV ]
● This is used when operation and the movement of the servo are reversed while operating Steering/throttle/
AUX1/AUX2.
1) Select BASE with up and down key
Select a channel to set (ST/TH/A1/A2).
2) Enter with the channel to be set by using up and down key.
The Reverse setting will be changed.
*When cancelling a selected feature, use the back key.
○Setting Range: NOR/REV
○Default: NOR
SUB TRIM [ SUB-T ]
● Using the Sub Trim feature, correct the neutral (center) of Steering/Throttle/A1/A2 so that Trim can be
used from the center position. When installing a servo on to an RC car, center the servo with Sub Trim first
before adjusting End Point Adjustment.
1) Before using, center (0) each main trim.
2) Select SUB-T with up and down key
Select a channel (ST/TH/A1/A2) to adjust Sub Trim.
3) Set the channel by Enter key.
4) Install the servo horn (servo saver horn) as close to
centered as possible.
*For installation position of the servo horn,
follow a car product instruction.
5) Adjust the center by using up and down key.
○Setting Range:L150～R150(ST)
H150～B150(TH)
H150～L150(AUX1, AUX2)
○Default: 0
Note
When installing the servo horn onto your servo, fix the servo horn as
close to the center as possible and center it with Sub Trim.
If Sub Trim and the transmitter main trim are off to one side,
it causes dead band (the range the servo does not move) to the steering
wheel and the throttle trigger.
●About Trim and Sub Trim
Trim is a feature for adjusting the neutral (center) position of the servo. When your model does not run straight after installing the steering servo onto the model,
Trim adjusts the main trim of the steering. Also, the neutral position of the carburetor on RC cars needs neutral adjustment of the throttle servo along with linkage
adjustment after installing the servo. Neutral position adjustment is necessary not only after installing the servo but for changes that happen during running such
as tire wears and chassis twist. MT-R Trim features two types of Trim including Center Trim that adjusts only the neutral position without changing the end of the
operating angle and Parallel Trim that moves the end of the operating angle and the neutral position simultaneously. Sub Trim that adjusts the neutral (center)
position before fixing the servo horn is Parallel Trim and the main trim is Center Trim.
○Center Trim (Main Trim) ○Parallel Trim (Sub Trim)
Even if you move the neutral position with Trim, the When you move the neutral position with Trim, the end of the
end of the operation angle does not move. operation angle also moves.When Sub Trim is adjusted after
linkage is completed, readjustment of End Point Adjustment
(EPA) will be necessary.
SETTING
REV Setting
Setting SUB-T
TRIM 1
(TRM 1)
Sw3
Sw1
TRIM 2
(TRM 2)
90°
Adjusting the center position
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