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Introduction
Newall Measurement Systems
2
1.0 INTRODUCTION
This manual will provide connection and mounting instructions for Newall's Absolute, Digital and Distance
Coded linear encoders. It is important that you read and understand this manual prior to commencing the
hardware installation. Electronic specifications can be found in the corresponding integration manual.
If you have any questions relating to this manual or installation contact Newall or your local authorised
Newall representative.
1.1 Bracketry
Due to the variety of machine types and applications, it may be necessary to design, make and fit custom
brackets for the linear encoder assembly. If custom brackets are needed, make certain they are rigid
enough not to allow any flexing or distorting while the machine is in operation. Newall offers a variety of
bracket kits to aid in the installation. Contact Newall or your local authorised representative for details.
1.2 Preparation
Prior to beginning the installation the machine should be studied to determine where the linear encoder(s)
will be fitted.
In order to reduce erroneous readings caused by machine wear, it is recommended that the scale be fitted
as close to the machine lead screw or axial drive shaft as possible.
The actual overall scale length is approximately 258mm (10.1") longer than the stated scale travel on these
SHG encoders (e.g. if SHG travel length is 40", the overall length of the scale will be 50.1").
For SHG-TS and SHG-VS outboard mounting of the scale support brackets will add approximately 20mm
(3/4") to the effective scale travel (Refer to Appendix A).
For a more compact installation, scale travels of 300mm (12") or less may be fitted by supporting one end
of the scale only by use of a single end mounting block (Refer to Figure 6.4 and 6.10).
The moving member of the linear encoder assembly can be either the reader head or the scale.
Cable routing from the reader head should be examined (See Section 8). Each reader head is provided with
either a 3.5 meter (11.5') or 7 meter (22') cable. Extension cables are available in 1 meter (3'), 2 meter
(6.5'), 3.5 meter (11.5'), 5 meter (16.5') and 10 meter (32') lengths. Contact Newall or your local authorised
representative for details.
1.3 Warnings
If for any reason the machine axis travel is greater than the actual scale travel, it is recommended that
‘mechanical stops’ are fitted to the machine to avoid damage caused by over travel. Newall will not accept
responsibility for scale and reader head damage caused by machine over travel.
Both the reader head and the scale are precision made components and it is important that they are
handled with care. By design, the linear encoders can withstand the rigors of the harsh workshop
environment. However, permanent damage can occur through bending or severe impact.
It is important that the scale be kept at least 13mm (0.5") away from any magnetic bases on indicators or
magnetic chucks.