Applied-motion 2035 User Manual download pdf (Page 7)

Using the Oscillator

Drives with an O suffix are equipped with internal

pulse generators that you can use to drive the motor.

To set the drive to oscillator mode, simply find the

jumper located near the center of the printed circuit

board and move it to the SLEW setting. The figure at the right shows the proper

setting of the jumper.

The oscillator is activated by driving the

STEP

input low. The frequency of step

pulses will increase linearly, accelerating the motor until it reaches a preset speed.

The motor will remain at this speed until the

STEP

input is driven high. The step

pulse frequency then decreases linearly, decelerating the motor and load to rest.

To change the slew speed, locate the trimpot labeled

SPEED

. By turning the brass

screw you can raise or lower the speed within a range of 0 to 5000 steps per second.

Turning the screw clockwise makes the motor run faster.

The acceleration and deceleration rates can also be adjusted using the trimpots

labeled

ACCEL

and

DECEL

. The range of accel and decel time is 5 to 900

milliseconds. Turning the pot clockwise makes the motor accelerate or decelerate

faster.

The ACCEL and DECEL pots are single turn, so don't try to turn

them too far.

COM

STEP

DIR

Inside 2035

2200

Connecting Logic

Internal Tach Circuit

Tach Output

The Tach Out signal is provided for measuring the motor speed. It generates one

pulse per motor step. The schematic diagram of the Tach Out optoisolation circuit

is shown below.

Do not connect the Tach output to more than 24VDC.

The current into the Tach+ terminal must not exceed 20 mA.

330Ω

internal

tach

signal

+5V

TACH–

TACH+

Optoisolator

NEC PS2501 or equiv.

inside 2035 O

Connecting Tach Output

to a Frequency Counter

4700Ω

5 - 24V

Power

Supply

TACH–

TACH+

–

Freq

Counter

2035 O

GND

-7--10-

The 2035 and 2035 O drives contain optical isolation circuitry to prevent the

electrical noise inherent in switching amplifiers from interfering with your circuits.

Optical isolation is accomplished by powering the motor driver from a different

supply than your circuits. There is no electrical connection between the two: signal

communication is achieved by infrared light. When your circuit turns on or turns off

an infrared LED (built into the drive) it signals a logic state to the phototransistors

that are wired to the brains of the drive.

A schematic diagram of the input circuit is shown below. Connect your logic

circuitry to the signal connector as shown in the sketch at the right. Even though the

drive provides it's own 5 volt logic power, you must supply 5-24 volts DC to

activate the LEDs on the input side of the

optoisolators. Most CMOS and open collector

TTL devices are directly compatible with this

drive. If you are using open collector outputs,

no pull up resistor is necessary.

Most step motor indexers and PLCs can also

connect directly to the 2035 and 2035 O drives.

The driver will step on the positive going edge

of the step pulse. Minimum pulsewidth is 10

µsec.

Si-100

+5 VDC

STEP–

STEP+

DIR–

DIR+

2035

COM

STEP

DIR

Connecting the 2035 to an Applied Motion Si-100 Indexer

(leave Si-100 STEP+ and DIR+ outputs unconnected)

Si-1

+5 VDC

STEP

DIR

2035

COM

STEP

DIR

Connecting the 2035 to an Applied Motion Si-1 Indexer

1 2 3 4 5 6 7 8

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Applied-motion 2035 User Manual Page 7

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