Table of Contents
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USER MANUAL
NI SMD-7610
This manual describes the NI SMD-7610 stepper motor drive. It describes electrical and
mechanical characteristics of the device, as well as I/O functionality.
Contents
Safety Information .................................................................................................................... 2
Block Diagram.......................................................................................................................... 3
Getting Started.......................................................................................................................... 3
Mounting the Drive .................................................................................................................. 4
Connecting the Power Supply .................................................................................................. 5
Choosing a Power Supply......................................................................................................... 6
Voltage.............................................................................................................................. 6
Current .............................................................................................................................. 6
Multiple Drives Sharing One Power Supply .................................................................... 7
Regeneration..................................................................................................................... 7
System Wiring Recommendations ........................................................................................... 7
Connecting Motors ........................................................................................................... 8
Connecting Input Signals.................................................................................................. 9
FAULT Output ................................................................................................................. 11
Configuring the Drive............................................................................................................... 12
Step 1: Selecting a Motor and Setting the Current ........................................................... 12
Step 2: Fine Tuning the Motor Current ............................................................................ 13
Step 3: Setting Idle Current .............................................................................................. 14
Step 4: Load Inertia .......................................................................................................... 15
Step 5: Step Size ............................................................................................................... 15
Step 6: Step Pulse Type .................................................................................................... 16
Step 7: Step Pulse Noise Filter ......................................................................................... 17
Step 8: Self Test................................................................................................................ 18
Torque Speed Curves................................................................................................................ 18
Motor Heating........................................................................................................................... 24
Drive Heating ........................................................................................................................... 27
Mechanical Outlines ................................................................................................................. 28
Technical Specifications........................................................................................................... 29
Alarm Codes ............................................................................................................................. 29
Worldwide Support and Services ............................................................................................. 30
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Table of Contents
Related Manuals for National Instruments NI SMD-7610
Summary of Contents for National Instruments NI SMD-7610
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Page 1: Table Of Contents
USER MANUAL NI SMD-7610 This manual describes the NI SMD-7610 stepper motor drive. It describes electrical and mechanical characteristics of the device, as well as I/O functionality. Contents Safety Information ........................2 Block Diagram.......................... 3 Getting Started.......................... 3 Mounting the Drive ........................4 Connecting the Power Supply .................... -
Page 2: Safety Information
Be alert to the potential for personal injury. Follow the recommended precautions and safe operating practices. Safety notices in this manual provide important information. Read and be familiar with these instructions before attempting installation, operation, or maintenance. The 2 | ni.com | NI SMD-7610 User Manual... -
Page 3: Block Diagram
one of the recommended motors a small flat blade screwdriver for tightening the connectors a source of step signals, such as a PLC or motion controller NI SMD-7610 User Manual | © National Instruments | 3... -
Page 4: Mounting The Drive
The connectors and other points of interest are illustrated below. These are detailed later in the manual. Figure 2 shows an overview of the connectors on the NI SMD-7610 stepper drive. Figure 2. NI SMD-7610 Stepper Drive Connectors 1 2 3 4 5 6 7 8... -
Page 5: Connecting The Power Supply
Use 18 or 20 gauge wire. The NI SMD-7610 contains an internal fuse that connects to the power supply + terminal. This fuse is not user replaceable. If you want to install a user serviceable fuse in your system, install a fast acting 3 amp fuse in line with the + power supply lead. -
Page 6: Choosing A Power Supply
That’s because the NI SMD-7610 uses a switching amplifier, converting a high voltage and low current into lower voltage and higher current. The more the power supply voltage exceeds the motor voltage, the less current you’ll need from the power supply. -
Page 7: Multiple Drives Sharing One Power Supply
All power supply cables should be properly shielded, and the shield grounded at the power supply. Signal cables should be shielded, and grounded as close as possible to the signal source. NI SMD-7610 User Manual | © National Instruments | 7... -
Page 8: Connecting Motors
Connecting Motors The following section explains how to connect motors to the NI SMD-7610. Refer to your motor documentation for any special considerations that may affect your configuration. Never connect or disconnect the motor while the system is powered on. -
Page 9: Connecting Input Signals
EN: A digital input for removing power from the motor. 5 to 24 V logic. STEP and DIR inputs can be converted to STEP CW and STEP CCW by Note configuring the internal jumper. Refer to Step 6: Step Pulse Type for information. NI SMD-7610 User Manual | © National Instruments | 9... - Page 10 Figure 10. Internal Circuit Diagram Connection Examples The following section demonstrates example signal connections. Refer to System Wiring Recommendations for cable instructions. STEP and DIR Figure 11. Connecting to Indexer with Sinking Outputs 10 | ni.com | NI SMD-7610 User Manual...
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Page 11: Fault Output
Figure 13. Connecting an NPN Type Proximity Sensor to an Input FAULT Output The NI SMD-7610 has a digital FAULT output. This output closes to signal a fault condition. This output can be used to drive LEDs, relays, or the inputs of other electronic devices like PLCs. -
Page 12: Configuring The Drive
Step 1: Selecting a Motor and Setting the Current The NI SMD-7610 is optimized for use with NI motors. To select a motor, move switches B1, B2, and B3 to the setting that corresponds to the motor of your choice. You can do this while power is on, but it is safer to select the motor before applying power to the drive so that you do not risk applying too much current to the motor. -
Page 13: Step 2: Fine Tuning The Motor Current
This is important if the motor is not mounted to a surface that will help it dissipate heat or if the ambient temperature is expected to be high. NI SMD-7610 User Manual | © National Instruments | 13... -
Page 14: Step 3: Setting Idle Current
To set the idle current to 50%, place Switch A3 in the down position. To set the idle current to 90%, place switch A3 in the up position. Table 4. Configuring Idle Current on Switch A3 14 | ni.com | NI SMD-7610 User Manual... -
Page 15: Step 4: Load Inertia
(2000 steps/ rev and beyond). The NI SMD-7610 drives include a feature called microstep emulation, also called step smoothing, that can provide smooth motion when using full steps or half steps. By selecting 200 smooth or 400 smooth, this feature is automatically employed to provide the smoothest possible motion when using full steps or half steps. -
Page 16: Step 6: Step Pulse Type
(STEP CW), while a second signal pulses for counterclockwise motion (STEP CCW). The NI SMD-7610 drives can accept this type of signal if you remove the drive cover and move jumper S3 from the default position on pins 1 and 2, to... -
Page 17: Step 7: Step Pulse Noise Filter
This results in extra motion and inaccurate motor and load positioning. To combat this problem, the NI SMD-7610 drives include a digital noise filter on the STEP and DIR inputs. There are two settings for this filter: 150 kHz and 2 MHz. 150 kHz works well for most applications. -
Page 18: Step 8: Self Test
2.5 turns in each direction. This feature can be used to confirm that the motor is correctly wired, selected, and otherwise operational. Table 8. Configuring the Self Test Function on Switch A1 Torque Speed Curves Figure 20. Torque Curve for ST8-1 with SMD-7610 18 | ni.com | NI SMD-7610 User Manual... - Page 19 Figure 21. Torque Curve for ST8-2 with SMD-7610 Figure 22. Torque Curve for ST11-1 with SMD-7610 NI SMD-7610 User Manual | © National Instruments | 19...
- Page 20 Figure 23. Torque Curve for ST11-2 with SMD-7610 Figure 24. Torque Curve for ST14-1 with SMD-7610 20 | ni.com | NI SMD-7610 User Manual...
- Page 21 Figure 25. Torque Curve for ST17-1 with SMD-7610 Figure 26. Torque Curve for ST17-2 with SMD-7610 NI SMD-7610 User Manual | © National Instruments | 21...
- Page 22 Figure 27. Torque Curve for ST17-3 with SMD-7610 Figure 28. Torque Curve for ST23-2 with SMD-7610 22 | ni.com | NI SMD-7610 User Manual...
- Page 23 Figure 29. Torque Curve for ST23-4 with SMD-7610 Figure 30. Torque Curve for ST23-6 with SMD-7610 NI SMD-7610 User Manual | © National Instruments | 23...
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Page 24: Motor Heating
Our measurements were made in a 40 °C (104 °F) environment with the motor mounted to an aluminum plate sized to provide a surface area consistent with the motor power dissipation. Your results may vary. Table 9. NI SMD-7610 Maximum Motor Duty Cycle Max Duty Cycle at 40 °C Ambient Current... - Page 25 Figure 31. Duty Cycle for the ST14-1 Figure 32. Duty Cycle for the ST17-1 NI SMD-7610 User Manual | © National Instruments | 25...
- Page 26 Figure 33. Duty Cycle for the ST17-2 Figure 34. Duty Cycle for the ST17-3 26 | ni.com | NI SMD-7610 User Manual...
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Page 27: Drive Heating
Drive Heating While NI SMD-7610 devices efficiently transmit power between the power supply and motor, they do generate some heat in the process. This will cause the temperature of the drive to rise above the surrounding air temperature and may also require that the drive be mounted to a heat conducting metal surface. -
Page 28: Mechanical Outlines
Mechanical Outlines Figure 36. Mechanical Dimensions, Top View Figure 37. Mechanical Dimensions, Front View 1 2 3 4 5 6 7 8 Figure 38. Mechanical Dimensions, Side View 28 | ni.com | NI SMD-7610 User Manual... -
Page 29: Technical Specifications
Table 10. Status LED Blink Code Definitions Blink sequence Code Error Solid green No alarm, motor disabled Flashing green No alarm, motor enabled RRRG 3 red, 1 green Over temperature NI SMD-7610 User Manual | © National Instruments | 29... -
Page 30: Worldwide Support And Services
NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the National Instruments global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data. © 2013 National Instruments. All rights reserved.
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