Newall C70 User manual

C70 Digital Readout Display
NEWALL MEASUREMENT SYSTEMS LTD
CONTENTS
2 SPECIFICATIONS
3 CONNECTIONS
4 MOUNTING
4 Arm Mounting (Non-adjustable)
4 Arm Mounting (Adjustable)
5 Face Mounting (Adjustable)
5 Lathe Mounting (Adjustable)
6 OPERATION
6 Understanding the Displays
6 Using the Keypad
7 STANDARD FUNCTIONS
7 Setting the Datum for Each Axis
7 Using Digifind
7 Using Centerfind
8 SETUP
8 Using Setup Mode
9 Encoder
10 Radius / Diameter
10 Direction
10 Error Compensation
11 Segmented Error Compensation
12 Linear Error Compensation
13 Zero Approach
14 SPECIAL FUNCTIONS
14 Add / Delete Function
14 Reset
14 Store
15 The Menu Function
16 TROUBLESHOOTING
16 CLEANING
16 NOTES

SPECIFICATIONS
SPECIFICATIONS C70 Digital Readout System
Newall Measurement Systems Ltd2
Electrical
EMC and Low Voltage Compliance
BS EN 55022:1998 Class B
BS EN 55024:1998
Power Supply Unit (supplied)
100 - 240V (47 - 63Hz)
External switch-mode
Conforms to Low Voltage Directive
EN 60 950:1992/
A1:1993/ A2:1994/ A3:1996/ A4:1997
Physical
Height
265mm (10.43”)
Width
180mm (7.09”)
Depth (not including connectors)
50mm (1.97”)
Weight
2.9kg (6.38lb)
Environmental
Operating Temperature
0 to 45°C
Storage Temperature
-20 to 70°C
Environmental Conditions
Indoor Use, IP20 (IEC 529)
Relative Humidity
Maximum 80% for temperatures up to 31°C
decreasing linearly to 33% at 45°C
Disposal
At the end of its life, the C70 system should
be disposed of in a safe manner applicable to
electronic goods.
DO NOT BURN.
The casework is suitable for recycling. If you
have any doubt about how to dispose of
your unit, please return it to Newall and we
will provide this service for you.
Input
Three Spherosyn or Microsyn encoders.
Resolutions
Spherosyn or Microsyn 10
(menu selection)
5µm (0.0002”)
10µm (0.0005”)
20µm (0.001”)
50µm (0.002”)
Microsyn 5
(menu selection)
1µm (0.00005”)
2µm (0.0001”)
5µm (0.0002”)
10µm (0.0005”)
NOTE: NEWALL MEASUREMENT SYSTEMS LTD
RESERVES THE RIGHT TO CHANGE SPECIFICATIONS WITHOUT NOTICE.
NOTES

C70 Digital Readout System
CONNECTIONS
Newall Measurement Systems Ltd 3
NOTES
DO NOT CONNECT
THIS UNIT DIRECTLY
TO THE MAINS SUPPLY.
If you have a Newall
encoder which is not
fitted with D-type
connector, an adaptor
cable is available.
Part No. 307-80980
Contact your supplier for
details.
2.5mm
Power Inlet
19 Vdc ±10%
@0.25A
Power
Indicator
Lamp
Encoder Inputs
9-way ‘D’
(All plugs should be
screwed finger tight)
Equipotential
Terminal
(Should be
grounded to
machine)
Cable Anchor
(The power cable
should be secured)
•The C70 is suitable for use only with Newall Spherosyn and Microsyn analogue encoders.
•Ensure that all cables are secured to prevent the connectors from dropping into hazardous
positions when unplugged, for example the floor or coolant tray.
•Ensure that all cables are routed to prevent them from being caught on moving parts.
•Turn off the power before connecting the encoder, by disconnecting the power supply connector.
•Ensure that the C70 is grounded to the machine before turning on the machine supply.
CONNECTIONS
Blanking Plug
(Do not remove
blanking plugs,
Which are used to
prevent accidental
connection of
incorrect encoders)

Arm Mounting (Non-adjustable)
Arm Mounting (Adjustable)
Face Mounting (Adjustable)
MOUNTING
MOUNTING, Arm mounting, Face Mounting C70 Digital Readout System
NOTES
Newall Measurement Systems Ltd4
•The C70 can be mounted in a variety of ways, depending on the mounting assemblies purchased
with the unit:
M10 stud & fixings,
supplied as standard
Arm mount adjustable pivot assembly
Part no. 600-80290
Mounting arm assembly
Part no. 294-35670
Mounting arm assembly
Part no. 294-35670
Face mount adjustable pivot assembly
Part no. 600-80270

Lathe Mounting (Adjustable)
Lathe Mounting (Adjustable) With Arm Assembly
NOTES
C70 Digital Readout SystemMOUNTING, Face Mounting, Lathe mounting
Newall Measurement Systems Ltd 5
Lathe mount adjustable pivot assembly
Part no. 600-80280
Lathe carriage assembly
Part no. 294-61695
Lathe headstock mount assembly
Part no. 294-60675
Lathe Carriage mount with arm
assembly
Part no. 600-80310
Arm mount adjustable pivot
assembly
Part no. 600-80290
Lathe Headstock with arm
assembly
Part no. 600-80300

Understanding the Displays
Using the Keypad
OPERATION
OPERATION, Understanding the Displays, Using the Keypad C70 Digital Readout System
NOTES
At the beginning of each
working session, set the
datum in Absolute
Mode, then switch the
C70 to Incremental
Mode.
By using the C70 in this
way, you will be able to
return the machine to its
absolute datum at any
time, simply by switching
back to Absolute Mode.
Newall Measurement Systems Ltd6
•The three Axis displays normally show the positions of the X, Y and Z axes.
•The three Axis Label displays normally show X, Y and Z, (in Lathe Mode X, Z and Z’).
•While any axis is moving, the Function display shows the Feedrate of the fastest moving axis, and
the feed indicator next to the display will illuminate.
Feedrate is displayed in mm/sec or inches/min, to a resolution on 0.1.
•The lathe and mill indicators will be illuminated depending on whether the lathe or mill functions
or both, are available.
Function Display
Navigation
Keys
Numeric Keys
Function
Keys
Axis
Select
Keys
Axis
Label
Displays
Axis Labels
in Lathe
Mode
Axis
Displays
In normal operation, the keys are used as follows:
•Press to toggle the displays between inches and millimetres.
•Press to toggle the C70 between absolute mode and incremental mode.
Absolute Mode
• In this mode, the C70 will display the positions of the three axes relative to a fixed datum.
Incremental Mode
• In this mode, the C70 can be used to display each position relative to the last position. This is also
known as point-to-point use.
Sleep Mode
•Press to temporarily turn off the displays and the keypad.
While the unit is in Sleep Mode, all settings are preserved, but the positions of the three axes are
updated. If any of the axes are moved while in Sleep Mode, the centre display will show
, and if any of the keys are touched, the centre display will show .

C70 Digital Readout System
Using Centerfind
Using Digifind
Setting the Datum for Each Axis
STANDARD FUNCTIONS
STANDARD FUNCTIONS, Setting the Datum, Digifind, Centerfind
NOTES
Using Zero redefines the
datum, so it will not be
possible to restore the
old datum.
Using Preset, Recall or
Centerfind will change
the datum - but in
Absolute Mode, Digifind
can still be used to return
to the old datum.
Do not move the
machine when the C70’s
power is off.
When the power is
switched back on again,
the C70 uses Digifind
automatically to re-
establish the datum for
each axis.
Digifind works only in
Absolute Mode.
Set the C70 to
incremental before using
Centerfind.
By doing this, you will be
able to return the
machine to its absolute
datum afterwards, simply
by switching back to
Absolute Mode.
Newall Measurement Systems Ltd 7
Zero
•To zero one display at the current position:
Press the Select Key for the axis to be zeroed. All readings will now be relative to this new zero
point.
Preset
•To preset one display to a known fixed value:
Press , then the Select Key for the axis to be preset, then enter the value.
For Example: Press to enter the value . All
readings will now be relative to this new value.
•If you make a mistake while entering a number, pressing will clear the entry one character at a
time.
Recall
•To quickly recall the last preset value for an axis:
Press , then the Select Key for the axis to be preset. All readings will now be relative to this
new value.
In the event that a datum is lost, either due to movement following a power failure, or after a fixed point
has been entered by mistake, it can easily be re-established, using Digifind.
In order to use Digifind, the absolute datum for each axis should be marked permanently on the
machine.
•Set the axis close to the marked datum - to within:
6.3mm (0.25”) for a Spherosyn encoder or
2.5mm (0.1”) for a Microsyn encoder.
•Switch the C70 to Absolute mode.
•Press , then the Select Key for the axis to be restored. The display will update to show the
exact distance from the datum.
Centerfind works by halving the distance displayed on the selected axis. It works in either Absolute or
Incremental Mode.
For Example: to find the center of a workpiece that is 100mm wide:
•Set the tool to one edge of the workpiece, and press the Select Key for the axis to be centered.
The display shows .
•Set the tool to the other edge of the workpiece. The display shows .
•Press . The display shows .
•Move the tool until the display shows . This is the center of the workpiece.

SETUP
Using Setup Mode
SETUP, Using Setup Mode C70 Digital Readout System
NOTES
Normally, Setup needs to
be done only once, and it
is possible that the
factory default settings
will be suitable and will
not require change.
1
Not all options will be
present, depending on
the setting of other
options.
For example, the Zero
Approach Limit option
will not be present if
Zero Approach is turned
off.
2
The Add Function and
Delete Function options
allow for the download
of programmable
functions from a PC,
connected to the C70 via
a serial lead connected to
Axis 1. The serail lead is
an option and can be
ordered seperately, if
required using Part No.
307-80990. Please
contact Newall for
pricing information
Newall Measurement Systems Ltd8
•To enter Setup Mode, first exit from any Special Function that is running, then press .
The centre display shows .
•Press or to cycle up and down the list of options.
The options are listed below, and each is described in detail on the following pages.
Option Default Display
Encoder Type all axes: Spherosyn
Encoder Resolution all axes: 0.005mm
Radius / Diameter all axes: Radius
Direction all axes: 1
Error Compensation all axes: Off
Linear Compensation see note 1
Segmented Compensation see note 1
Zero Approach On / Off all axes: Off
Zero Approach Limit see note 1
Add Function see note 2
Delete Function see note 2
Reset
Store
•When you have finished setting all the options, select .
Press to store any changes made.
The middle display shows for a few seconds, as your settings are stored.
The C70 exits from Setup Mode.
•Alternatively, pressing at any time will exit from Setup Mode and abandon any changes.

C70 Digital Readout System
Encoder
SETUP, Unit Information Mode, Machine Type, Encoder
NOTES
The Encoder settings
must match the actual
encoder in use, or the
C70 will not display
correctly.
Newall Measurement Systems Ltd 9
Encoder Type
There are three possible settings for each axis:
Spherosyn
Microsyn 10
Microsyn 5
•Press the Select Key next to the , or to cycle between the three settings for each axis.
Encoder Resolution
The Resolution settings available for each axis will depend on the encoder type, and also on the
setting.
Display Spherosyn Microsyn 10 Microsyn 5
mm in
1µm 0.001 0.00005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2µm 0.002 0.0001 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5µm 0.005 0.0002 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10µm 0.01 0.0005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20µm 0.02 0.001 . . . . . . . . . . . . . . . . . . . . . . . . .
50µm 0.05 0.002 . . . . . . . . . . . . . . . . . . . . . . . . .
•Press the Select Key next to the , or to cycle between the four available settings for
each axis.

Error Compensation
Direction
Radius / Diameter
SETUP, Radius / Diameter, Direction, Error Compensation C70 Digital Readout System
NOTES
The Diameter setting is
useful for lathes, and
other turning
applications, to display
diameter rather than
radius.
The Direction setting is
quite arbitrary. Set it to
whichever makes most
sense to the machine.
NB, Direction is
dependent on where the
scale is mounted
If Error Compensation is
applied, it is important
that is absolutely correct.
If it is not correct, errors
could be increased rather
than reduced.
After setting up the Error
Compensation, it is
advisable to check its
effect in normal
operation.
Segmented
Compensation need not
be over the entire scale
length.
It can be applied just to a
length of high
importance, or it can be
as small as one segment.
Newall Measurement Systems Ltd10
Selecting the Diameter setting causes the C70 to display double the actual movement on any axis.
There are two possible settings for each axis:
Radius
Diameter
•Press the Select Key next to the , or to cycle between the two settings for each axis.
The Direction setting allows you to match the C70 to the actual direction of travel of any axis.
There are two possible settings for each axis:
•Press the Select Key next to the , or to cycle between the two settings for each axis.
Errors can result from a number of sources, including machine wear. Where the degree of error increases
linearly along the length of travel of the scale, Linear Error Compensation should be applied. However,
where the errors are local to an area of travel, the Segmented Error Compensation should be applied.
There are three possible settings for each axis:
Off
Segmented Compensation
Linear Compensation
•Press the Select Key next to the , or to cycle between the three settings for each axis.
If one or more axes are set to Segmented Error Compensation, or Linear Error Compensation, then
the next setup option will be to configure the compensation for each of those axes.
•Press .
The middle display changes to .
Segmented Error Compensation
In this mode, the scale travel for each axis can be broken down into as many as 99 user-defined
segments, with each segment having its own correction factor. The correction factors are calculated by
the C70 by comparison against known, user-supplied standards.
•When power is applied, the display for any axis that is set to use Segmented Compensation
shows .
•If the machine has not been moved since the power was turned off, simply press , and the C70
will restore the last positions recorded.
•Alternatively, set each axis close to the Reference Point - to within:
6.3mm (0.25”) for a Spherosyn encoder or
2.5mm (0.1”) for a Microsyn encoder,
and press the Select Key next to the , or . The C70 will re-establish alignment with the
correction parameters.
Linear Error Compensation
In this mode, a single constant correction factor for each axis can be applied to all displayed
measurements. The correction factor is calculated by the user, and specified in parts per million (ppm).
Values between -9999 and +9999 are allowed.
See pages 11 and 12 for details
on using Linear and Segmented
Error Compensation