DPSI V-Match

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Product description

DPSI V-Match with programming magnet and EMCOTEC label

The DPSI V-Match is a servo v-cable which allows the operating of two servos on one receiver or DPSI channel. The servo connected to the SLAVE channel can be programmed and matched to the MASTER-Servo via the DPSI V-Match. Center position, end positions and direction of SLAVE servo are adjustable.

Functions

Changing of servo direction, servo middle and servo end position

The DPSI V-Match allows changing of servo direction as well as calibration of servo center and end positions of the servo connected to the "SLAVE" port. The programmed values are based on the looped in servo signale which is processed by the "MASTER" servo without being modified.

Failsafe function

Both servos ("MASTER" and "SLAVE") remain at their current position (HOLD) when encountering an erroneous or missing receiver signal until a valid signal is again delivered by the receiver. A flashing red LED (at the PCB's side) indicates this state and stays active (i. e. flashes) until power is turned off.

Pulse amplifier & HF suppression

Besides pulse amplifiers, which recognize and amplify even weak servo signals, high effective noise filters are built into the DPSI V-Match. Therefore, ferrite cores or other noise suppression measures can be omitted.

Delivery contents

DPSI V-Match, magnet switching element, short description

Mounting

The DPSI V-Match can be fixed e. g. with a double faced adhesive tape at the fuselage's inner side.

Connections


Programming

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For programming of the DPSI V-Match there is no external programming device necessary, e. g. a PC or a programming box. Only a delivered magnet must be used for activation of the corresponding programming functions. Everything else is done with the transmitter and remote control equipment.

During programming, settings of the original servo connected to the MASTER port (MSTR) remain unchanged! Programming always refers to the slave servo (SLAVE) connected to the DPSI V-Match's SLAVE port.

Programming mode is started when magnet is placed to the "PRG" position within 10 seconds after powering. When programming mode is activated the DPSI V-Match's red LED flashes with 0.5Hz (1 second on, 1 second off).

Distance...

Changing of servo direction

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For changing servo direction the magnet must be placed on the "PRG" position within 10 seconds after switching on receiver system. The magnet must remain on that position until programming is finished. Approx. 2.5 seconds after positioning the magnet, the servo makes a short move (10% stroke). If the magnet is removed within the next 5 seconds, the servo direction is reversed and permanently stored. The DPSI V-Match now executes a restart.

When servo's direction is changed all other settings remain unchanged.

Calibrating servo center

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For calibrating servo center the magnet must be placed on the "PRG" position within 10 seconds after switching on receiver system. The magnet must remain on that position until programming is finished. Approx. 2.5 seconds after positioning the magnet, the servo makes a short move (10% stroke). The stick or switch actuator must not be moved now, i.e. it must remain in center position. After 5 seconds, the servo makes a short move again. Now, programming of servo center is active.

The master servo now remains centered and does not move anymore, even if the stick is moved. With each movement of the transmitter stick out of center, the servo position (servo center) is incremented or decremented by one step.

If the stick remains in one end-position, steps automatically increment or decrement after 2.5 seconds. This serves for quicker settings of the values.

Due to the high resolution of the DPSI V-Match, changes of the servo position are possibly recognizable only after several steps.

Remove the magnet from its red dot position ("PRG") as soon as the slave servo reaches the desired center position. The DPSI V-Match now starts with the newly programmed center position of the slave servo.

Calibrating servo end positions

A71005 22.jpg

For calibrating servo end positions the magnet must be placed on the "PRG" position within 10 seconds after switching on receiver system. The magnet must remain on that position until programming is finished. Approx. 2.5 seconds after positioning the magnet, the servo makes a short move (10% stroke). The transmitter stick (or switch actuator) must be set to maximum position (servo end-limit) within 5 seconds after the servo makes its first short move. After these 5 seconds the servo moves again shortly and both servos remain in their actual (maximum)-position. Reposition the stick to its center position – servo positions do not alter!

Reset of programmed settings

For total reset of all programmed settings is possible place the magnet after power on to the "PRG" position and hold it there for approx. 40 seconds. After 2.5 seconds and after additional 5 seconds the servo makes its short move (just like when programming center and end limits). The transmitter stick must not be moved at that time and the magnet must remain at the "PRG" position. After 40 seconds have elapsed, all settings are deleted and a restart of the DPSI V-Match takes place. Now, the magnet can be removed.

Programming of several servos

If more than two servos need to be synchronized (e. g. three aileron servos) two DPSI V-Match can be chained one after another. This means: the input of the second DPSI V-Match connects to the MSTR output of the first DPSI V-Match.

Now, a SLAVE output is available at the first DPSI V-Match, a MSTR and a SLAVE output at the second one. Both SLAVE servos can now be independently set up.

Limits of tuning range

The DPSI V-Match only allows for certain values when programming or adjusting the slave servo. Because the slave servo is to be adapted to the master servo, both servos should have similar base adjustments in the first place, e.g. comparable center positions.

If the center of the master servo already is over 100% of the possible servo stroke it does not make much sense to adjust the slave servo even further. Therefore, only a maximum of +/-100% (referring to JR values) of the servo center position is possible.

Adjustment of the slave servo is carried out by a so-called 3-point curve (i.e. center, maximum value left/top, maximum value right/bottom).

The "distance" of the maximum position of a servo in respect to its center must be at least 20%, otherwise the value is not programmable.

Range checking accompanies each programming. It is therefore not possible to position the servo center position off limits. Malfunctions are avoided this way (e. g. V-curve of the servo).

Specifications

Table 1: Specifications DPSI V-Match
Voltage range 4V ... 8.4V
Current consumption approx. 4.7mA
Servo signal level input Low level: 0V ... 0.8V High level: 2.0V ... 8.4V
Servo signal level output Supplying > 5.1V: approx. 5.0V Supplying < 5.1V: supply voltage -0.1V
Max. current 8A permanent, 20A peak
Allowed center position +/-100% (1.10ms ... 1.90ms)
Allowed end positions* +/-200% (0.70ms ... 2.30ms)
Allowed signal cycle time min. 6.9ms, max. 34.868ms
Resolution (steps) 3200
CE test according to2004/108/EC
Temperature range -20°C ... +85°C
HF noise suppression -30dB attenuation @ 35MHz
Dimensions approx. 50mm x 8,4mm x 7,2mm
Weight approx. 4.5g