Leadshine MX3660 Hardware Installation Manual

Hardware Installation Manual

MX3660

3-Axis Stepper Drive with Breakout Board & I/O’s

Version 1.2

3 / 2015

http://www.leadshine.com

http://www.leadshineusa.com

© 2015 Leadshine Technology Co., Ltd.

Revision

Date

Description of Release

1.0

11/2013

Initial Release

1.1

1.2

12/2013
03/2015

Update for connection diagram and digital output description
Update output current tables ,description for power input and analog
output

Hardware Manual for Leashine MX3660 3-Axis Stepper Drive with Breakout Board & I/O’s ii

Notice

Read this manual carefully and the MX3660 datasheet before any assembling and using. Incorrect handling of

products in this manual can result in injury and damage to persons and machinery. Strictly adhere to the technical

information regarding installation requirements.

This manual is not for use or disclosure outside of Leadshine except under permission. All rights are reserved. No

part of this manual shall be reproduced, stored in retrieval form, or transmitted by any means, electronic,

mechanical, photocopying, recording, or otherwise without approval from Leadshine. While every precaution has

been taken in the preparation of the book, Leadshine assumes no responsibility for errors or omissions. Neither is

any liability assumed for damages resulting from the use of the information contained herein.

This document is proprietary information of Leadshine that is furnished for customer use ONLY. Information in this

document is subject to change without notice and does not represent a commitment on the part of Leadshine.

Therefore, information contained in this manual may be updated from time-to-time due to product improvements,

etc., and may not conform in every respect to former issues.

Record of Revisions

Hardware Manual for Leashine MX3660 3-Axis Stepper Drive with Breakout Board & I/O’s iii

Contents

1. INTRODUCTION ........................................................................................................................ 4

2. FEATURES ................................................................................................................................. 4

3. APPLICATIONS .......................................................................................................................... 4

4. BLOCK DIAGRAM ...................................................................................................................... 5

5. DIMENSIONS ............................................................................................................................ 6

6. GET STARTED ............................................................................................................................ 6

7. CONNECTING A POWER SUPPLY ................................................................................................ 7

8. CONNECTING STEPPER MOTORS ............................................................................................. 7

8.1. CONNECTING A 4-LEAD STEPPER MOTOR ............................................................................................. 7

8.2. CONNECTING A 6-LEAD STEPPER MOTOR ............................................................................................. 8

8.2.1. CONNECTING A 6-LEAD STEPPER MOTOR IN SERIES CONNECTION ................................................... 8

8.2.2. CONNECTING A 6-LEAD STEPPER MOTOR IN SERIES CONNECTION ................................................... 8

8.3. CONNECTING A 8-LEAD STEPPER MOTOR ............................................................................................. 9

8.3.1. CONNECTING A 8-LEAD STEPPER MOTOR IN SERIES CONNECTION ................................................... 9

8.3.2. CONNECTING A 8-LEAD STEPPER MOTOR IN PARALLEL CONNECTION............................................... 9

9. CONNECTING AN E-STOP SWITCH OR SHORTING THE CONNECTION ....................................... 10

10. ENABLING / DISABLING CHARGE PUMP ................................................................................ 11

11. SETTING THE “SMOOTHER” SWITCH ...................................................................................... 11

12. CONFIGURING OUTPUT CURRENT AND MICRO STEP ............................................................. 12

12.1. CONFIGURING THE OUTPUT CURRENT ............................................................................................. 12

12.2. CONFIGURING THE OUTPUT CURRENT ............................................................................................. 13

13. CONNECTING THE DB25 CONNECTOR .................................................................................... 13

13.1. CONNECTING THE DB25 STEP & DIRECTION PINS .............................................................................. 13

13.2. CONNECTING THE DB25 FAULT OUTPUT PIN ..................................................................................... 14

13.3. CONNECTING THE DB25 CHARGE PUMP PIN ..................................................................................... 14

13.4. CONNECTING THE PWM PIN ............................................................................................................ 14

14. OPTIONAL CONNECTIONS FOR INPUTS/OUTPUTS ................................................................. 16

14.1. CONNECTING THE DIGITAL INPUTS .................................................................................................. 16

14.2. CONNECTING THE DIGITAL OUTPUTS ............................................................................................... 16

14.3. CONNECTING THE ANALOG OUTPUT ................................................................................................ 16

APPENDIX A: MX3660 CONNECTION DIAGRAM ........................................................................... 19

APPENDIX B: DB25 CONNECTOR PINOUT .................................................................................... 20

APPENDIX C: DIGITAL INPUTS ..................................................................................................... 22

APPENDIX D: DIGITAL OUTPUTS ................................................................................................. 23

APPENDIX E: OPTO-ISOLATED ANALOG OUTPUT ......................................................................... 23

APPENDIX F: STEPPER DRIVE MODULE REPLACEMENT ................................................................ 24

APPENDIX G: WARRANTY INFORMATION .................................................................................... 24

APPENDIX H: TROUBLE SHOOTING ............................................................................................. 24

CONTACT US ................................................................................................................................. 25

Hardware installation manual of the multi-axis drive MX3660

!

Warning

The MX3660 can also be used to power 4-phase (0.9°) stepper motors. But in this case,

there will be 400 full steps needed for each revolution. You need to make sure that the

settings in your controller (motion controller, PLC, CNC control system…) are properly

configured to reflect this requirement.

1. Introduction

Thank you for choosing the Leadshine MX3660, a high performance 3-axis stepper drive with built-in breakout

board and I/O’s based on the latest DSP technology. The MX3660 is specially designed for EASY and RAPID control of

up to three 2-phase (1.8°) stepper motors in frame sizes NEMA 17, 23, 24, and 34. It operates under 20-60 VDC

supply voltage and can output up to 6.0A current (peak of sinusoidal) per axis. The MX3660 takes step & direction

control and is easy to implement for OEM applications.

2. Features

 Power up to 3 stepper motors of NEMA 17, 23, 24, or 34
 Sophisticated stepper motor control based on latest DSP technology
 Built-in breakout board and I/O’s
 Step & direction Control
 200 KHz maximum frequency for each axis
 20 - 60 VDC supply voltage
 1.41 - 6.0A (1.45 - 6.0A) output current per axis
 8 micro step settings: 1, 1/2, 1/4, 1/8, 1/10, 1/16, 1/32, 1/64
 8 output current settings: 1.41, 2.12, 2.83, 3.54, 3.96, 4.24, 4.95, 6.0 A (version1.0b, it’s the latest and

default version for future), corresponding RMS current settings: 1.0, 1.5, 2.0, 2.5, 2.8, 3.0, 3.5, 4.25A

 8 output current settings: 1.45, 2.08, 2.72, 3.37, 4.05, 4.72, 5.35, 6.0 A (for previous version1.0a)
 Damping and anti resonance
 Allowing individual output current & micro step configurations for each axis
 Input pulse smoothing to improve performance of movement jittering
 Extra low motor heating & noise
 Extra smooth motor movement
 Simple micro step & output current configuration via DIP switches
 Fault output
 Compact size and easy setup
 50% automatic idle current reduction

3. Applications

The MX3660 3-axis stepper drive can be easily and rapidly implemented in stepper control systems for applications

such as CNC routers / engravers, CNC mills, CNC cutters, laser cutters / markers / engravers, CNC welders, CNC

water jets, X-Y tables, lathes, dispensing machines, medical equipment, scientific instruments…

Its unique design with built-in breakout board and I/O’s fits seamlessly in many applications powered by many

popular CNC control systems such as Mach3, Mach4, EMC, WinCNC, etc.

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Hardware installation manual of the multi-axis drive MX3660

MX3660

CNC Machines / Devices

Inputs

Controller

Or

Or

Motion

Controller

PC-Based

Control System

(Mach3, WinCNC

EMC…)

Breakout

Board

Drive 1

I/O

Ext. Device

(e.g. Limit Switches)

Ext. Device

(e.g. VFD)

Ext. Device

(e.g. Coolant)

PWM

Stepper Motor X

Stepper Motor Y

Stepper Motor Z

Output1

0-10V

Outputs

Ext. Device

(E.g. Spindle Motor)

4-pin Screw
Terminal

I/O’s

Input

DB25

Power

Module

Power Supply

6-bit DIP

Drive 2

4-pin Screw
Terminal

6-bit DIP

Drive 3

4-pin Screw
Terminal

6-bit DIP

Charge

Pump

Digital

Smoother

Switch

PLC

ESTOP

DSP

DSP

DSP

4. Block Diagram

The following diagram shows MX3660 main internal components and how it interfaces with other components in

the motion control system of your machine/device.

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Figure 1 MX3660 Block diagram

5. Dimensions

162±0.5

169±1.5

19.5±0.3

54.5±0.3

77.5±1.5

5

162±0.5

16±0.2

37±1.5

5

3.5

3.5

CN1: DB25 Connector

DP3: Z-Axis DIP switch

CN5: Z-Axis Motor Connector
DIP2: Y-Axis DIP switch

DP1: X-Axis DIP switch

CN3: X-Axis Motor Connector

CN4: Y-Axis Motor Connector
CN8: Analog Output

CN7: Digital Outputs
CN6: Digital Inputs
CN2: Power Connector

DP4: Pulse Switch &

Smoother switch

Hardware installation manual of the multi-axis drive MX3660

Figure 2 MX3660 dimensions

6. Get Started

Before you start hardware connection, refer to the following MX3660 layout diagram (figure 3) for connector/DIP

switch location. Read the MX3660 datasheet for each connector explanation. Then, get the following prepared:

 A 24-54 VDC power supply.
 Up to 3 stepper motors depending on how many axes that MX3660 will power in your application.
 A source of step signals, such as a motion controller, PLC, or a PC-based control system (Mach3/4 , EMC, etc.).
 A small flat blade screw driver for tightening the screw connectors of the MX3660.
 Whatever optional external devices needed to be controlled through the built-in outputs and inputs.

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Figure 3 MX3660 layout

Hardware installation manual of the multi-axis drive MX3660

!

Warning

(1) Never power on the power supply before finishing all the connections and

configurations.

(2) Make sure the two power supply leads,

﹢&﹣

, are correctly connected to the MX3660

power connector. Wrong connection will destroy the MX3660 and void its warranty.

(3) Connecting a power supply with output voltage of 60VDC or up could damage the

MX3660, and void its warranty.

+20-60VDC

Power GND

DC Power Supply

(20-54VDC)

MX3660

+

-

7. Connecting a Power Supply

The power supply connector is located at the upper left side of MX3660 (“CN2” in Figure 3). The power supply of the

MX3660 can be connected as illustrated in Figure 4. Although MX3660’s working voltage is 20-60 VDC, we suggest

the use of a 20-54 VDC power supply to leave room for back EMF voltage charge back during motor deceleration.

Figure 4 Power supply connections

8. Connecting Stepper Motors

There are 3 stepper drive modules for the MX3660 to allow connections of up to three 2-phase stepper motors.

Because of the wide output current range from 1.41 to 6.0A for each stepper drive module, the MX3660 can drive

various stepper motors in frame sizes NEMA 17, 23, 24, and 34. You can find the 3 stepper drive modules locate at

CN3, CN4, and CN5 on Figure 3. These stepper motors can be 4-lead, 6-lead, or 8-lead stepper motors.

To get the maximum torque from a stepper motor, the output current required from a stepper drive equals to the

motor phase current multiplied by 1.4. Higher output current from a stepper drive module will result the stepper

motor torque; but that also increase the motor heating. Therefore, it is recommended to set “just-enough” output

put current to get the needed torque, and as less motor heating as possible.

8.1. Connecting a 4-Lead Stepper Motor

A 4 lead motor is the easiest to connect, and its speed-torque performance depends on its motor inductance.

Refer to the wiring diagram of your stepper motor, and connect its wires to the motor connector to one of the

MX3660 stepper drive module. Refer to Figure 5 on next page.

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Hardware installation manual of the multi-axis drive MX3660

A+

A-

B+

B-

MX3660

A+

A-

B+

B-

6-lead Stepper Motor

6 Leads

A+

A-

B+

B-

NC

NC

A+

A-

B+

B-

MX3660

A+

A-

B+

B-

6-lead Stepper Motor

6 Leads

A+

A-

B+

B-

NC

NC

A+

A-

B+

B-

MX3660

A+

A-

B+

B-

4-lead Stepper Motor

4 Leads

A+

A-

B+

B-

Figure 5 Connecting a 4-lead stepper motor

8.2. Connecting a 6-Lead Stepper Motor

The MX3660 can drive 6-lead stepper motors in either half coil connection or full coil connection. Before the

connection, please read the datasheet of your stepper motor.

8.2.1. Connecting a 6-Lead Stepper Motor in series connection

This configuration is also referred to as half chopper. When connecting a 6-lead stepper motor, the half coil

configuration uses 50% of the motor phase windings. This results in lower inductance, and hence lower torque

output at low-speed movements. Like the parallel connection of an 8 lead motor, this connection is commonly

used in applications requiring better high-speed torque performance. Refer to Figure 6 for the connection.

Figure 6 Connecting a 6-lead stepper motor in half-coil

8.2.2. Connecting a 6-Lead Stepper Motor in series connection

This configuration is also referred to as full copper. The full coil connection for a six lead motor is commonly

used in applications requiring for higher torque performance at lower-speed movements. Refer to Figure 7 for

the connection.

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Figure 7 Connecting a 6-lead stepper motor in full coil

Hardware installation manual of the multi-axis drive MX3660

A+

A-

B+

B-

MX3660

A+

A-

B+

B-

8-lead Stepper Motor

8 Leads

A+

A-

B+

B-

8.3. Connecting a 8-Lead Stepper Motor

The MX3660 can drive an 8-lead stepper motor in either series connection or parallel connection. Before the

connection, please read the datasheet of your stepper motor.

8.3.1. Connecting a 8-Lead Stepper Motor in series connection

Refer to the wiring diagram of your stepper motor datasheet. Figure 8 illustrates how to connect an 8-lead

stepper motor to the MX3660 in series connection.

An 8-lead stepper motor in series connection requires less current, so the motor coils can be charged quicker

and achieves peak output torque faster than the same motor connected in parallel connection. This makes

series connection preferable for applications that require higher torque at lower speed. But on the other side,

because of its higher inductance, 8-lead stepper motor in series connection generates more motor heating and

its higher speed torque performance is not good as a parallel connected stepper motor. It is recommended for

not setting drive current no more than 70% of its rated current to prevent too much heating for a series

connected 8-lead stepper motor, but what current to set is application dependent and at a user’s choice.

Figure 8 Connecting an 8-lead stepper motor in series connection

8.3.2. Connecting a 8-Lead Stepper Motor in Parallel Connection

Refer to the wiring diagram of your stepper motor datasheet. Figure 9 illustrates how to connect an 8-lead

stepper motor to the MX3660 in parallel connection.

Due to the lower inductance for an 8-lead stepper motor in parallel connection, its high speed torque drops

slower (“better high-speed torque”) than in series connection during higher speed motor rotation. This makes

parallel connection preferred for applications runs in high speeds constantly such as CNC Routers. Due to the

parallel connected stepper motor will draw more current, thus it also has high requirements for the powering

stepper drive. Fortunately, the maximum 6.0A output for each of three stepper drive module will allow the

MX3660 to drive stepper motors up to NEMA 34 in parallel connection.

Theoretically, to get the maximum torque of a parallel connected 8-lead stepper motor, you should multiply the

phase current by 1.4. But it is suggested to set a “just enough” lower value to prevent too much heating from

your stepper motor.

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Hardware installation manual of the multi-axis drive MX3660

!

Warning

Never connect or disconnect a stepper motor while the power is on.

!

Notice

Without the a E-STOP switch connected, or short circuit between Estop+ and Estop­pins, the red LED lights of the 3 stepper drive modules will blink 3 times periodically
when MX3660 is powered on

Estop+

Estop-

MX3660

E-Stop Switch

Normal close

A+

A-

B+

B-

MX3660

A+

A-

B+

B-

8-lead Stepper Motor

8 Leads

A+

A-

B+ B-

Figure 9 Connecting an 8-lead stepper motor in parallel connection

9. Connecting an E-Stop Switch or Shorting the Connection

The E-Stop connection is required. The E-Stop connector is located next to the power connector (Figure 3). By

default, the MX3660’s activation requires an emergency stop switch connected, or having the two connection

pins, “ESTOP+” and “ESTOP-“, shorted.

Refer to Figure 10 for how to connect an” E-Stop switch. To short the E-Stop connection, just connect a signal

wire between the “ESTOP+” and “ESTOP –” pins.

Figure 10 E-stop switch connections

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Hardware installation manual of the multi-axis drive MX3660

!

Caution

The ON/OFF direction for the “Pulse Switch” is different from the ON/Off direction
of the DIP switch in a stepper drive module, which is used to configure the output
current and micro step by a stepper drive module. Refer to Figure 11.

!

Caution

The ON/OFF direction for the “Smoother” switch is different from the ON/OFF
direction of the three DIP switches for the 3 stepper drive modules, which is used to
configure output current and micro step by a stepper drive module. Refer to Figure
11 for “Smoother” switch direction.

10. Enabling / Disabling Charge Pump

To make the MX3660 working properly, setting this switch to the right position is required. The MX3660 is

featured with a feature called “Charge Pump”, a watchdog timer to enable/disable the MX3660. When the

charge pump feature is turned on, the MX3660’s activation will depend on the receiving of 10 kHz signals at pin

16 of the DB25 connector. When the “Charge Pump” feature is turned off, the MX3660 will be activated without

such verification.

By default, the charge pump feature is turned on, with the “Pulse Switch” (next to the DB25 connector) set to

the “Off” position (means “Charge Pump” on). To disable this feature and make the MX3660 to work with

control systems (e.g. PLC, motion controller, etc.) not designed to use the “Charge Pump” feature, set the

“Pulse Switch” to “ON” position (meaning “Charge Pump” off).

Figure 11 On/Off positions for “Pulse Switch” and “Smoother” Switches

11. Setting the “Smoother” Switch

The firmware of each of the three stepper drive modules in the MX3660 adopts a feature called
“smoothing” to smooth input step signals. When an input pulse emulated by the connected motion

controller or CNC control system are not in linear or equivalent width, called “noise pulse”, it will cause erratic

motion and additional motor/drive noise. Turning on the built-in digital smoother will trigger the input pulse

train smoothing and could potentially improve motion performance such as less jittering, higher torque, and

quicker response. Because of the complexity for different machines/devices, the “Smoother” feature may or

may not have obvious effect (but at least no hurt for the bottom line). Turning on this switch or off is totally

your choice.

The “Smoother” switch is located next to the DB25 connector. By default, the MX3660 smoother is set to off.

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Hardware installation manual of the multi-axis drive MX3660

Peak

RMS

SW1

SW2

SW3

1.41A

1.00A

on

on

on

2.12A

1.50A

off

on

on

2.83A

2.00A

on

off

on

3.54A

2.50A

off

off

on

3.96A

2.80A

on

on

off

4.24A

3.00A

off

on

off

4.95A

3.50A

on

off

off

6.00A

4.25A

off

off

off

Peak

RMS

SW1

SW2

SW3

1.45A

1.04A

on

on

on

2.08A

1.48A

off

on

on

2.72A

1.94A

on

off

on

3.37A

2.41A

off

off

on

4.05A

2.89A

on

on

off

4.72A

3.37A

off

on

off

5.35A

3.82A

on

off

off

6.00A

4.29A

off

off

off

12. Configuring Output Current and Micro Step

The MX3660 allows individual settings of the output current and micro step resolution for each stepper motor,

via the 6-pin DIP switches of three stepper drive modules (DP1, DP2, and DP3 on Figure 3).

Figure 12 DIP switch for current & micro step configurations

12.1. Configuring Output Current

The output current configuration is required. Use SW1, SW2, and SW3 of the 6-pin DIP switch (Figure 12) of a

stepper drive module to configure the output current to the driven stepper motor. Refer to Table 1 and Table 2

for available output current settings. The MX3660 has two versions. The main difference is current output, as

shown below. Table 1 is for the drives with firmware V1.0b (It’s the latest version or default version.), and Table

2 is for the drives with firmware V1.0a.

For a stepper drive module (V1.0b)

Table 1 Output current settings for a stepper drive module (V1.0b)

For a stepper drive module (V1.0a)

Table 2 Output current settings for a stepper drive module (V1.0a)

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Hardware installation manual of the multi-axis drive MX3660

Micro Step

Steps/Rev

SW4

SW5

SW6

Full

200

On

On

On

Half

400

Off

On

On

1 / 4

800

On

Off

On

1 / 8

1600

Off

Off

On

1 / 10

2000

On

On

Off

1 / 16

3200

Off

On

Off

1 / 32

6400

On

Off

Off

1 / 64

12800

Off

Off

Off

12.2. Configuring Micro Step Resolution

The micro step resolution configuration is required. Use pin 4, 5, and 6 of the 6-pin DIP switch (Figure 12) of a

stepper drive module to configure the micro step resolution for the driven stepper motor. Refer to Table 3 for

available micro step resolution settings.

Table3 Micro step settings for a stepper drive module

13. Connecting the DB25 Connector

Refer to “Appendix A” for detail specification for the MX3660 DB25 connector pin-out. The DB25 connector is

used to connect, directly / indirectly (e.g. via a circuit board), to a source of control signals (“controller”

hereafter) such as a motion controller, a PLC, an indexer, PC-based control system (e.g. Mach 3, Mach 4, EMC,

WinCNC, etc.).

The controller is the “Brain” of the whole motion control system for: (1) sending signals of step, direction, and

charge pump, to control the MX3660; (2) sending digital/analog signals for the controls of external devices,

which are connected at the MX3660 digital output connector; (3) accepting “Fault” output from the MX3660; (4)

take input signals sent from the external devices connected at the MX3660 digital input connector.

We will only depict the pin connections for step & direction, fault output, charge pump, and PWM. Refer to

Appendix A for pin outs for other optional I/O’s

13.1. Connecting the DB25 Step & Direction Pins

The step and direction pin connections are required. Step signals are sent to the MX3660 via pin 2, 4, 6 of the

DB25 connector. Direction signals are sent to the MX3660 via pin 3, 5, 7. Refer to Figure 13.

Step and direction signal voltage should be 3.3-5 VDC and “Active High”. In the controller configuration, the step

width should be configured to a value at least 2.5 uS, and direction setup time needs to be at least 5 uS.

Otherwise, it could cause loss of steps, or no motion at all for the controlled stepper motors.

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!

Caution

If step & direction signal voltage is lower than 5 VDC, you may need to increase step
width and direction setup time (> 5 uS) to move your motors, or avoid loss of step.

Figure 13 Connecting the step & direction signals of a controller to the MX3660

13.2. Connecting the DB25 Fault Output Pin

The fault pin connection is optional. The MX3660 3-axis stepper drive will send a “Fault” output signal of 5 VDC

back to the controller via Pin 15 (Appendix A) of the DB25 connector, in one of the following scenario:

 Any of the 3 stepper drive module is in protection mode including over voltage and over current. Read

“Protection” detail in the MX3660 datasheet.

 The connected external E-Stop switch in the digital input is pressed.

With the receiving of a fault received from the MX3660, a controller can be notified an abnormal event has

happened. It can then react, such as shutting down the whole control machine/device for machine damage.

13.3. Connecting the DB 25 Charge Pump Pin

The charge pump pin connection is optional. To implement the “charge pump” feature of the MX3660 3-axis

stepper drive, turn off the Pulse Switch (page 7) and keep sending 10 kHz signals to Pin 16 of the DB25 connector

while the controller works properly. In this scenario, the “PULSE LED” on the MX3660 will be turned on to

indicate that everything is fine. When no such signal received, the MX3660 will be disabled with the “PULSE

LED” light off, to prevent from any further action caused by controller malfunction for connected stepper motors
and external devices. Read “Enabling / Disabling Charge Pump” in page 7 for additional information.

Connecting the DB25 PWM Pin

The PWM pin connection is optional. The MX3660 can take PWM signals from the controller, through Pin 14 of

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the DB25 connector, transform it into an analog signal, and output as analog voltage signal at the “0-10V” pin of

the analog output connector (Figure 3). This will allow the control of an external analog device such as a VFD for

spindle speed control in a CNC router.

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!

Warning

When the input voltage of the main power supply is higher than 24 VDC, you can NOT
use it to supply power to the 4 digital outputs, and another power source or 5-24
power supply has to be used.

Input 1+

GND

MX3660

Home Switch

Normal open

14. Optional Connections for Inputs/Outputs

The MX3660 3-axis stepper drive is equipped with 4 built-in digital inputs, 4 digital outputs, and one 0-10 V analog

output. Those connections are totally optional and not required to make the MX3660 work.

14.1. Connecting the Digital Inputs

The digital input connections are optional. The 4 general digital inputs are located at the Digital Input Connector

(Figure 3) of the MX3660. They are named as Input 1, Input 2, Input 3, and Input 4. They can be used for any

purpose such as connecting limit/home switches. Connect one end of your device wire to the “Input X” (X can

be 1, 2, 3, or 4) pin, and the other wire to “GND” pin next to the input pin (for one wire device, short it to GND).

On Figure 14, it shows how to connect a home/limit switch to digital input “Input 1”.

Figure 14 Home / limit switch connections of the MX3660

14.2. Connecting the Digital Outputs

The digital Output Connections are optional. The 4 general digital outputs are located at the Digital Output

Connector (Figure 3) of the MX3660, named as Output 1, Output 2, Output 3, and Output 4. They can be used

for any purpose such as a DC relay for coolant in a CNC router. They are connected to Pin 17, 1, 8, and 9 of the

DB25 connector respectively. They can be used for other purpose such as a DC relay for coolant in a CNC router.

Connect one end of the load to “Output X+” (X can be 1, 2, 3, or 4) pin and the other end to the VDC+ of a

5-24VDC power source. Then, connect the related “Output X-” pin of the MX3660 to the power supply VDC-.

Those digital outputs are rated at max 70mA. Refer to figure 16 of “MX3660 Connection Diagram”.

14.3. Connecting the Analog Output

The analog output connection is optional. The MX3660 3-axis stepper drive also comes with an opto-isolated

analog output (Figure 3) to allow control of an external device with analog input command, such as a VFD for

spindle control. Supply voltage for the analog device is 5-15 VDC, and the output voltage signal is 0 to (Analog

Supply Voltage minus 1.1 VDC).

On Figure 15, it shows how to connect a VFD to the opto-isolated analog output. Connect the VFD 10 VDC power

wire to “+10 VDC” pin, “Input” wire to “0-10V”, and GND wire to “GND”, and

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MX3660

+10V

INPUT

GND

+10Vdc

0-10V

EGND

VFD

Figure 15 Connecting a VFD to the MX3660

Figure 16 shows the relationship of the spindle speed output in Mach3 and analog output of the MX3660.

Testing conditions:

(1) Used MACH3, settings: PWMBase Freq. = 10, Minimum PWM = 0%,

(2) Used “+12Vdc Out”, the 12VDC auxiliary power output on the MX4660 as the power input for “+10Vdc in”

of the VFD (The measured value of the “+12VDC auxiliary power output of the M3660” was：11.98VDC.).

(3) Device for measuring voltage was Agilent digital oscilloscope DSO-X 3014A. (The raw data of the testing

results are available on request.)

Figure 16 Spindle output & analog output of the MX3660

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The precision of the analog output is related to PWMBase Freq. parameter settings. When set PWMBase Freq. =

80 Hz, the precision/resolution reached to +/- 11.875 mV. See Figure 17 below.

Figure 17 PWMBase Freq. parameter settings & analog output precision

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Appendix A: MX3660 Connection Diagram

When implemented properly, the MX3660 can be used to power three 2 phase (1.8°) stepper motors of NEMA 17,

23, 24, and 34. In addition, it can also allow controls of optional external devices via the built-in digital inputs, digital

outputs, and the opto-isolated analog output. Figure 18 illustrates the MX3660 connection diagram with 3 stepper

motors. External devices through MX3660 I/O connections are optional at a user’s choice.

Figure 18 MX3660 Connection Diagram

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Pin

Name

Description

1

INPUT 2

General purpose digital input. It is connected to “Output 2” of the digital output

connector (CN7 on Figure 3). Used to forward an input signal sent from the connected

motion controller to the device connected at “Output 2”.

2

X-AXIS STEP

Input step signal for the X-axis stepper drive board.

3

X-AXIS

DIRECTION

Input direction signal for the X-axis stepper drive board.

4

Y-AXIS STEP

Input step signal for the Y-axis stepper drive board.

5

Y-AXIS

DIRECTION

Input direction signal for the Y-axis stepper drive board.

6

Z-AXIS STEP

Input step signal for the Z-axis stepper drive board.

7

Z-AXIS

DIRECTION

Input direction signal for the Z-axis stepper drive board.

8

INPUT 3

General purpose digital input. It is connected to “Output 3” of the digital output

connector (CN7 on Figure 3). Used to forward an input signal sent from the connected

motion controller to the device connected at “Output 3”.

9

INPUT 4

General purpose digital input. It is connected to “Output 4” of the digital output

connector (CN7 on Figure 3). Used to forward an input signal sent from the connected

motion controller to the device connected at “Output 4”.

10

OUTPUT 1

General purpose digital output. It is connected to “Input 1” of the digital input

connector (CN6 on Figure 3). Used to forward an output signal from the device

connected at “Input 1”, to the motion controller.

11

OUTPUT 2

General purpose digital output. It is connected to “Input 2” of the digital input

connector (CN6 on Figure 3). Used to forward an output signal from the device

connected at “Input 2”, to the motion controller.

12

OUTPUT 3

General purpose digital output. It is connected to “Input 3” of the digital input

connector (CN6 on Figure 3). Used to forward an output signal sent from the device

connected at “Input 3”, to the motion controller.

13

OUTPUT 4

General purpose digital output. It is connected to “Input 4” of the digital input

connector (CN6 on Figure 3). Used to forward an output signal sent from the device

connected at “Input 4”, to the motion controller.

14

PWM

PWM pulse input. Used to get the PWM signal from the controller which will be then

transformed into an analog signal to an external device connected at “0-10 DC” pin of

the analog output connector (Figure 3), such as a VFD for spindle speed control.

Appendix B: DB25 Connector Pinout

Figure 19 DB25 connector pin assignments

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15

FAULT

Fault signal output. The fault pin connection is optional. Pin 15 is a

Pull-Down-Connection.

TTL level high: Fault

TTL level low: No fault.

TTL level high will be in one of the following scenario:

• Any of the 3 stepper drive module is in protection mode including over voltage and

over current. Read “Protection” detail in the MX3660 datasheet.

• The connected external E-Stop switch in the digital input is pressed.

With the receiving of a fault from the MX3660, a controller can be notified an

abnormal event has happened. It can then react, such as shutting down the whole

control machine/device for machine damage.

16

CHARGE

PUMP

General digital input. A watchdog timer to enable/disable the MX3660. When “Pulse

Switch” (Figure 3) is set to “OFF” position (Charge pump feature not turned off), the

MX3660 will be only enabled with 10 KHz signal receiving at this PIN. Otherwise (no

such signal received), the MX3660 will be disabled. For example, in Mach3 controlled

CNC applications, the MX3660’s enabling/disabling will depend on the receiving of

“Charge Pump” signal from Mach 3.

17

INPUT 1

General purpose digital input. It is connected to “Output 1” of the digital output

connector (CN7 on Figure 3). Used to forward an input signal sent from the connected

motion controller to the device connected at “Output 1”.

18-25

GND

Ground

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Name

Description

Estop+

Emergency stop input (12V Sourcing). When activated, all three drive boards will be shut down and

the MX3660 will stop working. The red LED of each drive module will blink three times periodically

every 4 seconds to indicate an emergency event signal received. In this case, a fault output will be

sent to pin 15 - “Fault”- of the DB25 connector to notify the connected motion controller.

Estop-

Common ground

Input 1

General purpose Input (12V sourcing). This pin is connected to pin 10 - “Output 1” - of the DB25

connector. Used to forward the digital output signal, sent from the connected external device here, to

the motion controller connected through the DB25 connector.

GND

Common ground

Input 2

General purpose Input (12V sourcing). This pin is connected to pin 11 - “Output 2” - of the DB25

connector. Used to forward the digital output signal, sent from the connected external device here, to

the motion controller connected through the DB25 connector.

GND

Common ground

Input 3

General purpose Input (12V sourcing). This pin is connected to pin 12 - “Output 3” - of the DB25

connector. Used to forward the digital output signal, sent from the connected external device here, to

the motion controller connected through the DB25 connector.

GND

Common ground

Input 4

General purpose Input (12V Sourcing). This pin is connected to pin 13 - “Output 4” - of the DB25

connector. Used to forward the digital output signal, sent from the connected external device here, to

the motion controller connected through the DB25 connector.

GND

Common ground

Appendix C: Digital Inputs

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Name

Description

Output 1 +

General purpose output (max 24V@70mA). This pin is connected to pin 17 - “Input 1” - of the

DB25 connector. Used to output the digital signal, sent through DB25 “Input 1” from the motion

controller, to the connected external device here.

Output 1-

General purpose output - for Output 1

Output 2 +

General purpose output (max 24V@70mA). The pin is connected to pin 1 - “Input 2” - of the DB25

connector. Used to output the digital signal, sent through DB25 “Input 2” from the motion

controller, to the connected external device here.

Output 2-

General purpose output - for Output 2

Output 3 +

General purpose output (max 24V@70mA). This pin is connected to pin 8 - “Input 3” - of the DB25

connector. Used to output the digital signal, sent through DB25 “Input 3” from the motion

controller, to the connected external device here.

Output 3-

General purpose output - for Output 3

Output4 +

General purpose output (max 24V@70mA). This pin is connected to pint 9 - “Input 4” - of the DB25

connector. Used to output the digital signal, sent through DB25 “Input 4” from the motion

controller, to the connected external device here.

Output 4-

General purpose output - for Output 4

Name

Description

+10V

Power source connection pin for the connected analog external device (e.g. VFD), connected at the

analog output connector. Voltage range of 5-15VDC.

0-10V

Voltage output to control the external analog device. The powered voltage is 0 to supplied power

voltage minus 1.1 VDC. This pin is used to control the external analog device by the controller

through PWM signals accepted at PIN 14 of the DB25 connector. Read pin 14 - “PWM” - of the

DB25 Connector for more information.

EGND

External +10V ground

Appendix D: Digital Outputs

Appendix E: Opto-Isolated Analog Output

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Symptoms

Possible Cause

Solution

A motor doesn’t

move

No power

Connect Power

Wrong signal and / or stepper

motor connection

Correct the DB25 connector and / or stepper motor

connection(s)

No E-Stop connection

Option 1: connect an E-Stop switch. Or,

Option 2: short “E-Stop +” and “E-Stop+” pins

The stepper drive modules is

under protection

Make sure the power supply voltage is not too high.

Also look into your mechanic systems and make sure

it does not cause over current protection.

Control signal voltage is too low

Increase step width.

Motor spins in wrong

direction

Wrong motor wiring

Reverse wires on one phase of the stepper motor

Loss of steps

Wrong step enabling setting in

your controller

By default, MX3660 step enabling is “Active High”.

Change your step enabling configuration of your

controller to “Active High” also.

Direction set up time is too

short

Increase the direction set up time in your controller

to at least two times of pulse width

Interference

Shield your signal cables and keep the MX3660 as far

as possible, from other electronic components

Appendix F: Stepper Drive Module Replacement

In the case that one of the three stepper drive modules of the MX3660 does not work (the green LED light is not on

when the MX3660 is powered on) you can replace it with a Leadshine SDM660 stepper drive module. Contact us for

getting a new SDM660.

Appendix G: Warranty Information

The MX3660 3-axis stepper drive comes with 12-month limited warranty under proper use. Contact your MX3660

supplier first for warranty service. If your MX3660 was bought through Leadshine or one of its subsidiaries, contact

us directly.

Appendix H: Trouble Shooting

In the case that the MX3660 doesn’t operate properly, the first step is to identify whether the problem is electrical

or mechanical in nature. The next step is to isolate the system component that is causing the problem. As part of

this process you may have to disconnect the individual components that make up your system and verify that they

operate independently. It is important to document each step in the troubleshooting process. You may need this

documentation to refer back to at a later date, and these details will greatly assist our Technical Support staff in

determining the problem should you need assistance.

Many of the problems that affect motion control systems can be traced to electrical noise, controller software

errors, or mistakes in wiring.

The following table shows some commonly asked symptoms and possible solutions.

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Symptoms

Possible Cause

Solution

The red LED light of a

stepper drive module

blinks

Power supply voltage is too

high

Use a lower voltage power supply (24-54 VDC)

No E-Stop connection

Option 1: connect an E-Stop switch. Or,

Option 2: short “E-Stop +” and “E-Stop+” pins

Damaged stepper motor

Replace your stepper motor

Over current protection caused

by mechanic system

Check and fix the mechanic problem(s) from your

mechanic system.

Acceleration is too fast.

During deceleration, back EMF voltage charge has

enabled drive “Over Voltage” protection. Lower

down you acceleration/deceleration.

Excessive motor and

drive heating

Load is too high

Use a larger motor or motors

Mechanic problem

Check your mechanic system

Bad heating dissipation

Add a fan or other device to improve air circulation

The green light of a

drive module is not on

That stepper drive module is

already damaged

Contact Leadshine for a new stepper drive module

for replacement

Leadshine Headquarters

Address: 11/F, Block A3, iPark

No.1001 Xueyuan Blvd.

Nanshan District, Shenzhen, China

Tel: [phone]

Fax: [phone]

Web: www.leadshine.com

Sales Email: [email protected]

Support: [email protected]

Leadshine America, Inc.

Address: 25 Mauchly, Suite 318

Irvine, CA 92608

USA

Tel: [phone]

Fax: [phone]

Web: www.leadshineusa.com

Sales Email: [email protected]

Support: [email protected]

Appendix F: Trouble Shooting (Continued)

Contact Us

Contact Leadshine HQ, Leadshine USA Inc., or your local authorized Leadshine distributors for sales, technical

support, and other services.

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