scheda controllo per servocomando cablata con 3 servocomandi

Control for servo control

The servo control (code VE015-008), allows to manage, through the use of a button or switch (selectable with a solder pad on the board) two servomotors with parallel displacement and, if necessary, manage a third servo with push-pull movement .

TECHNICAL DATA

Power supply voltage: 4 - 7Vdc;
Absorption: 100mA (Max) at 7Vcc;
Speed adjustment: single-turn linear trimmer;
Opening angle adjustment: single-turn linear trimmer;
Supported servos: Analog and digital;
Six-pin connector for parallel connection of two servos;
Three-pin connector for the connection of the servo with rotation in push-pull;
2-pin terminal block for the connection of the button or switch;
Operation with button or switch selectable directly from the board.

Technical data

USE OF THE CIRCUIT

The servo control allows you to manage analog and digital servos in a simple way ed economically.

IThe control is entrusted to the 8-bit microprocessor "12F1571" from Microchip, it:

monitors the status of the input for the button;
it takes the angular position and the speed of movement from the two trimmers;
generates a PWM signal for motor controls.

The opening angle is adjustable by acting on the “ANGLE” trimmer, turning to the left, the servo opening angle increases, turning to the right, the opening angle decreases.

The speed of movement is adjustable by acting on the "SPEED" trimmer, turning to the right, the speed decreases, turning to the left, the speed of the servo increases.

The jumper "SJ1" allows you to select the operating mode:

SJ1 closed: push button operation;
SJ1 open: switch operation;

The closure of the jumper must be done with a welding.

Using the circuit

connessioni scheda controllo per servocomando

OPERATION OF THE "COUNTERPHASE" SYSTEM

We assign the name SERVO2 to the servo wired on the single connector, and SERVO1 to the one wired on the double connector; as soon as power is supplied to the circuit, the SERVO1 moves into the rest position with an angle of 0 °, while the SERVO2 moves into the rest position with an angle of 180 °.

By pressing the key that activates the movement, the two servos begin to move with the speed set by the “SPEED” trimmer and continue their travel until they reach the angle set with the “ANGLE” trimmer.

Ex:

displacement angle set at 40 °, the SERVO1 assumes an angle of 40 ° while the SERVO2 of 140 °;
displacement angle set at 170 °, the SERVO1 assumes an angle of 170 ° while the SERVO2 of 10 °;

ADJUSTMENT

After making all the connections listed above, proceed as follows for the adjustment:

rotate the trimmers (ANGLE and SPEED) to the central position;
Supply power to the circuit (the servos moves to the initial position, ie the rest position);
press the wired button or switch on the SWITCH input (the servos rotate to the opening position adjusted by the trimmer);
Use the ANGLE trimmer to adjust the desired opening angle and use the SPEED trimmer to adjust the execution speed.

FIELD OF APPLICATION

Home automation
Automotive
Robotics
Model making

VIDEO

AVAILABLE VARIATIONS

In addition to the classic control, the device can be purchased in 6 different variants:

continuous displacement ; in this configuration the servo performs a continuous forward and backward movement until the button or switch remains closed, the angle and the speed of rotation can be adjusted by trimmer.
continuous movement with central rest position ; in this configuration the servo performs a continuous movement (+ -90 ° max), starting from a central rest position (0 °); the angle and the speed of rotation are adjustable by trimmer.
movement with two buttons ; in this configuration the servo performs a classic movement with the only variation of using a second key to return to the rest position; the angle and the speed of rotation are adjustable by trimmer. NB: in this variant it is possible to use only buttons and not switches, the output for the servo in push-pull is not available as it is used to accommodate the second button.
DX / SX movement with two buttons and central rest position ; in this configuration the servo is in the central position and performs a movement towards the right or left of a maximum of 90 ° according to the key pressed; the angle and the speed of rotation are adjustable by trimmer. NB: in this variant it is possible to use only buttons and not switches, the output for the servo in push-pull is not available as it is used to accommodate the second button.
shifting with two buttons of two distinct angles ; in this configuration the servo performs two movements depending on the key pressed; the angle of the single movement is adjustable by trimmer. NB: in this variant it is possible to use only buttons and not switches, the output for the servo in push-pull is not available as it is used to accommodate the second button, the speed of execution of the movement is fixed at maximum speed because the trimmer for the speed is used for the angle of the second displacement.
shifting with a button of two distinct corners in succession ; in this configuration the servo performs two movements with two distinct angles in succession; the angle of the single movement is adjustable by trimmer. NB: in this variant it is possible to use only buttons and not switches, the execution speed of the movement is fixed at the maximum speed because the speed trimmer is used for the angle of the second movement.