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MSD752 Stepper Drive

MSD752
MSD752 Microstepping Drive

Introduction

The M752 is a high performance microstepping driver based on pure-sinusoidal current control technology. Owing to the above technology and the self-adjustment technology (self-adjust current control parameters) according to different motors, the driven motors can run with smaller noise, lower heating, smoother movement and have better performances at higher speed than most of the drivers in the markets. It is suitable for driving 2-phase and 4-phase hybrid stepping motors.

 

Features

  High performance, cost-effective
  Supply voltage up to +75 VDC
  Output current up to 5.2A
  Self-adjustment technology
  Pure-sinusoidal current control technology
  Pulse input frequency up to 300 KHz
  TTL compatible and optically isolated input
  Automatic idle-current reduction
  16 selectable resolutions in decimal and binary, up to 51,200 steps/rev
  Suitable for 2-phase and 4-phase motors
  Support PUL/DIR and CW/CCW modes
  Short-voltage, over-voltage, over-current protections

 

Applications

Suitable for a wide range of stepping motors, from NEMA size 17 to 34. It can be used in various kinds of machines, such as X-Y tables, labeling machines, laser cutters, engraving machines, pick-place devices, and so on. Particularly adapt to the applications desired with low noise, low heating, high speed and high precision.

 

Electrical Specifications (Tj = 25oC/77oF)

Parameters

M752

Min

Typical

Max

Unit

Output current

1.8

-

5.2 (3.7 RMS)

A

Supply voltage

+20

+48

+75

VDC

Logic signal current

7

10

16

mA

Pulse input frequency

0

-

300

kHz

Isolation resistance

500

 

 

Mohm

 

Mechanical Specifications (unit: mm[inch])

 

 

Pin Assignment and Description

Connector P1 Configurations

Pin Function

Details

PUL+

Pulse signal: In single pulse (pulse/direction) mode, this input represents pulse signal, each rising or falling edge active (set by inside jumper J3); 4-5V when PUL-HIGH, 0-0.5V when PUL-LOW. In double pulse mode (pulse/pulse) , this input represents clockwise (CW) pulse,active at high level or low level (set by inside jumper J3). For reliable response, pulse width should be longer than 1.5µs. Series connect resistors for current-limiting when +12V or +24V used. The same as DIR and ENA signals.

PUL-

DIR+

DIR signal: In single-pulse mode, this signal has low/high voltage levels, representing two directions of motor rotation; in double-pulse mode (set by inside jumper J1), this signal is counter-clock (CCW) pulse,active at high level or low level (set by inside jumper J3). For reliable motion response, DIR signal should be ahead of PUL signal by 5µs at least. 4-5V when DIR-HIGH, 0-0.5V when DIR-LOW. Please note that rotation direction is also related to motor-driver wiring match. Exchanging the connection of two wires for a coil to the driver will reverse motion direction. The default rotation direction can be reverse by inside jumper J2.

DIR-

ENA+

Enable signal: This signal is used for enabling/disabling the driver. High level (NPN control signal, PNP and Differential control signals are on the contrary, namely Low level for enabling.) for enabling the driver and low level for disabling the driver. Usually left UNCONNECTED (ENABLED).

ENA-

 

Connector P2 Configurations

Pin Function

Details

+V

Power supply, 20~75 VDC, Including voltage fluctuation and EMF voltage.

GND

Power Ground.

A+, A-

Motor Phase A

B+, B-

Motor Phase B

 

Selecting Microstep Resolution and Driver Output Current


This driver uses an 8-bit DIP switch to set microstep resolution, and motor operating current, as shown below:

 

Microstep Resolution Selection

Microstep resolution is set by SW5, 6, 7, 8 of the DIP switch as shown in the following table:

    Microstep

Steps/rev.(for 1.8o motor)

SW5

SW6

SW7

SW8

2

400

ON

ON

ON

ON

4

800

OFF

ON

ON

ON

8

1600

OFF

OFF

ON

ON

16

3200

ON

OFF

ON

ON

32

6400

ON

ON

OFF

ON

64

12800

OFF

ON

OFF

ON

128

25600

OFF

OFF

OFF

ON

256

51200

ON

OFF

OFF

ON

5

1000

ON

ON

ON

OFF

10

2000

OFF

ON

ON

OFF

20

4000

OFF

OFF

ON

OFF

25

5000

ON

OFF

ON

OFF

40

8000

ON

ON

OFF

OFF

50

10000

OFF

ON

OFF

OFF

100

20000

ON

OFF

OFF

OFF

200

40000

OFF

OFF

OFF

OFF

 

Current Settings

The first three bits (SW1, 2, 3) of the DIP switch are used to set the dynamic current. Select a setting closest to your motor's required current.

Peak Current

RMS Current

SW1

SW2

SW3

1.26A

0.90A

ON

ON

ON

1.80A

1.29A

OFF

ON

ON

2.36A

1.68A

ON

OFF

ON

2.92A

2.09A

OFF

OFF

ON

3.51A

2.51A

ON

ON

OFF

4.09A

2.92A

OFF

ON

OFF

4.64A

3.32A

ON

OFF

OFF

5.20A

3.71A

OFF

OFF

OFF

Note: Due to motor inductance, the actual current in the coil may be smaller than the dynamic current setting, particularly under high speed condition.

 

Typical Connection

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