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Technical Documentation
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Motor manual
3-phase stepping motors
VRDM 3xx
Document: 0098441113309
Edition: V1.00, 02.2006
Berger Lahr GmbH & Co. KG
Breslauer Str. 7
D-77933 Lahr

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Important information
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VRDM 3xx
Important information
The drive systems described here are products for general use that con-
form to the state of the art in technology and are designed to prevent any
dangers. However, drives and drive controllers that are not specifically
designed for safety functions are not approved for applications where
the functioning of the drive could endanger persons. The possibility of
unexpected or unbraked movements can never be totally excluded wit-
hout additional safety equipment. For this reason personnel must never
be in the danger zone of the drives unless additional suitable safety
equipment prevents any personal danger. This applies to operation of
the machine during production and also to all service and maintenance
work on drives and the machine. The machine design must ensure per-
sonal safety. Suitable measures for prevention of property damage are
also required.
See safety section for additional critical instructions.
Not all product variants are available in all countries.
Please consult the current catalogue for information on the availability of
product variants.
We reserve the right to make changes during the course of technical de-
velopments.
All details provided are technical data and not promised characteristics.
In general, product names must be considered to be trademarks of the
respective owners, even if not specifically identified as such.
-2 3-phase stepping motors

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VRDM 3xx
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Table of Contents
Table of Contents
Important information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -3
Writing conventions and symbols. . . . . . . . . . . . . . . . . . . . . . . -7
1 Introduction
1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Options, accessories and wiring . . . . . . . . . . . . . . . . . 1-2
1.3
1.3.1
1.3.2
Type code and nameplate . . . . . . . . . . . . . . . . . . . . . . 1-3
Overview of type code of VRDM 3xx . . . . . . . . . . . 1-3
Name plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.4 Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.5 Directives and standards. . . . . . . . . . . . . . . . . . . . . . . 1-5
1.6 Declaration of conformity. . . . . . . . . . . . . . . . . . . . . . . 1-7
2 Safety
2.1 Qualification of personnel . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.3 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
3 Technical Data
3.1 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 Ambient conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.3 Life time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.4 IP degree of protection . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3.5 Motor models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.6
3.6.1
3.6.2
3.6.3
3.6.4
3.6.5
VRDM 36x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Motor-specific data of VRDM 36x . . . . . . . . . . . . . . 3-6
Shaft load of VRDM 36x . . . . . . . . . . . . . . . . . . . . . 3-7
Type code of VRDM 36x . . . . . . . . . . . . . . . . . . . . . 3-8
Dimensional drawing of VRDM 36x . . . . . . . . . . . 3-10
Characteristic curves of VRDM 36x . . . . . . . . . . . 3-12
3.7
3.7.1
3.7.2
3.7.3
3.7.4
3.7.5
VRDM 39x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Motor-specific data of VRDM 39x . . . . . . . . . . . . . 3-15
Shaft load of VRDM 39x . . . . . . . . . . . . . . . . . . . . 3-16
Type code of VRDM 39x . . . . . . . . . . . . . . . . . . . . 3-16
Dimensional drawing of VRDM 39x . . . . . . . . . . . 3-19
Characteristic curves of VRDM 39x . . . . . . . . . . . 3-21
3-phase stepping motors
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VRDM 3xx
3.8
3.8.1
3.8.2
3.8.3
3.8.4
3.8.5
VRDM 311x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Motor-specific data of VRDM 311x . . . . . . . . . . . . 3-24
Shaft load of VRDM 311x . . . . . . . . . . . . . . . . . . . 3-25
Type code of VRDM 311x . . . . . . . . . . . . . . . . . . . 3-25
Dimensional drawing of VRDM 311x . . . . . . . . . . . 3-28
Characteristic curves of VRDM 311x . . . . . . . . . . . 3-30
3.9 Optional holding brake . . . . . . . . . . . . . . . . . . . . . . . . 3-32
3.10 Optional encoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34
3.11 Optional gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
3.11.1 Assignment of motor-gearbox . . . . . . . . . . . . . . . . 3-38
3.11.2 Dimensional drawings of gearbox . . . . . . . . . . . . . 3-40
4 Installation
4.1 Before installation... . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.2 Electromagnetic compatibility, EMC . . . . . . . . . . . . . . . 4-3
4.3 Mechanical installation . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4.4
4.4.1
4.4.2
4.4.3
4.4.4
Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Calculation of installation space. . . . . . . . . . . . . . . . 4-8
Motor connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Encoder connection . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Holding brake connection . . . . . . . . . . . . . . . . . . . 4-12
5 Commissioning
5.1 Preparing for commissioning . . . . . . . . . . . . . . . . . . . . 5-2
5.2 Running commissioning . . . . . . . . . . . . . . . . . . . . . . . . 5-3
6 Diagnostics and troubleshooting
6.1 Mechanical faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.2 Electrical faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
7 Accessories and spare parts
7.1 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.2 Motor cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
8 Service, maintenance and disposal
8.1 Service address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
-4 3-phase stepping motors

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VRDM 3xx
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Table of Contents
9 Glossary
9.1
9.1.1
9.1.2
9.1.3
9.1.4
9.1.5
9.1.6
9.1.7
9.1.8
9.1.9
Units and conversion tables . . . . . . . . . . . . . . . . . . . . 9-1
Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Force. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Moment of inertia . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Conductor cross section . . . . . . . . . . . . . . . . . . . . . 9-2
9.2 Terms and Abbreviations. . . . . . . . . . . . . . . . . . . . . . . 9-3
10 Index
3-phase stepping motors
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