MOONS SR4 User Manual
SR4
2 Phase Step Motor Drive
User Manual
Rev. 1.1
AMP & MOONS’ Automation
SR4 User Manual
Contents
1 Introduction .............................................................................3
1.1 Overview ......................................................................................3
1.2 Features .......................................................................................3
1.3 Block diagram ..............................................................................4
2 Mounting the Drive ................................................................4
3 Connections ...........................................................................5
3.1 Connecting to the Power Supply .................................................5
3.2 Connecting to a Motor .................................................................5
3.3 Connecting to the Inputs ..............................................................6
3.3.1 Step & Direction Inputs ........................................................................ 6
3.3.2 EN Input............................................................................................... 7
3.3.3 Fault Output ......................................................................................... 8
4 Switch Selection .....................................................................9
4.1 Running Current ..........................................................................9
4.2 Idle Current ..................................................................................9
4.3 Microstepping ..............................................................................9
4.4 Self Test ......................................................................................10
5 Motor Selection .....................................................................10
5.1 Recommended motors ...............................................................11
6 Error Codes ...........................................................................13
7 Reference Materials ..............................................................13
7.1 Mechanical Outline .....................................................................13
7.2 Specications ..............................................................................14
7.2.1 Electrical Specications ...................................................................... 14
7.2.2 Environmental Specications ............................................................. 14
7.3 Torque Curves ............................................................................15
8 Contacting MOONS’ ..............................................................16
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SR4 User Manual
1 Introduction
Thank you for selecting the MOONS’ SR4 Motor Drive. We hope our commitment to performance,
quality and economy will make a successful motion control project.
1.1 Overview
The SR series drives are cost-effective, high performance 2 phase step drives. The design is
based on PID current control technology, and features high torque, low noise, and low vibration.
The running current and microstep resolution are switch selectable.
1.2 Features
• Power Supply - operates from a 24 to 48 volt DC power supply
• Output Power - position switch selectable, 8 settings, max 4.5 amps peak
• Current Control - advanced digital current control provides excellent high speed torque
• Microstep Resolution -
25600, 51200 step/rev
• Speed Range - speeds up to 3000 rpm
• Anti Resonance - raises the system-damping ratio to eliminate midrange instability and allow
stable operation throughout the speed range of the motor.
• Auto Setup - measures motor parameters and congures motor current control and anti-resonance gain settings
• Microstep Emulation - performs high resolution stepping by synthesizing coarse steps into ne
micro-steps
• Control Modes - Step & Direction or CW/CCW pulse
• Input Digital Filters - 2 MHz digital lter for high speed inputs
• Motor Type Select - a 16 bit rotary switch is used to select the desired motor database which
is pre-loaded at the Factory
• Load Inertia Select - as part of the motor database each motor can be selected for use with
low or high load inertia.
• Idle Current - switch selectable for 50% or 90% idle running current reduction 1 second after
the motor stops
position switch selectable, 8 settings: 400, 800, 1600, 3200, 6400, 12800,
• Self Test - switch selectable, the drive will perform a 2 rev, 1 rps, CW/CCW move test
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SR4 User Manual
SR4
1.3 Block diagram
Block Diagram
switch
Optical
8-bit
switch
24-48VDC
External Power Supply
Rotary code
Isolation
5V
switching
reg
3.3V
reg
DSP
Voltage
Det.
17.5V
Drivers
LED
reg
Gate
(4)
MOSFETs
(8)
Over
Current
Det.
motor
2 Mounting the Drive
The SR4 Step Drive can be mounted on the wide or the narrow side of the chassis. If it is mounted on the wide side, M3 screws should be used through the four corner holes. For narrow side
mounting applications, M3 screws can be used in the two side holes.
The ampliers in the drive generate heat. To operate the drive continuously at maximum power
forced air cooling, as from a fan, should be provided.
Never use the drive in a space where there is no air ow or where other devices can cause the
surrounding air to be more than 40 °C. Never put the drive where it can get wet or where metal
particles can fall into it.
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SR4 User Manual
3 Connections
To use the SR4 Step Drive, the following items
are needed:
• A power supply (24 - 48 VDC)
• Pulse & Direction signal
• A compatible step motor
3.1 Connecting to the Power Supply
If the power supply does not have a fuse on the
output or some kind of short circuit current limiting
device, a fast acting fuse is required. A 4 amp fast
acting fuse should be installed in line with the “+” power supply lead.
Connect the motor power supply “+” terminal to the drive terminal labeled “V+”. Connect the power
supply “-” to the drive terminal labeled “V-”.
Be careful not to reverse the wires.
3.2 Connecting to a Motor
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