Newall A50 User manual
A50 Single Axis Digital Readout System
NEWALL MEASUREMENT SYSTEMS LTD
CONTENTS
2 SPECIFICATIONS
3 CONNECTIONS
4 INSTALLATION
4 Panel Mounting
4 Desktop Mounting
5 OPERATION
5 Setting the display
6 Using Digifind
6 Using Centerfind
7 SETUP
7 Using setup mode
8 Encoder type
8 Resolution
9 Direction
9 Radius / Diameter
10 Error compensation
11 Linear error compensation
12 Segmented error compensation
14 TROUBLESHOOTING
15 CLEANING
N
CONNECTIONS
A50 Digital Readout SystemCONNECTIONS
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: 307-60940
Contact your supplier for
details.
2.5mm Power Inlet
15 - 24Vdc ±10% @0.25A
Encoder Input
9-way ‘D’
Earth Ground Terminal
(Should be grounded to machine) Cable Tie Anchor
(All cables should be secured)
·The A50 is suitable for use only with Newall Spherosyn and Microsyn analogue encoders.
·Ensure that all cables are secured to prevent their 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 supply before connecting the encoder, by disconnecting power supply connector
·Ensure that the A50 is grounded to the machine before turning on the machine supply.
Blanking Plug
Setting The Display
OPERATION
A50 Digital Readout SystemOPERATION, Setting the display
NOTES
Toggling the display off
doesn’t turn the power off
- as long as the power
supply is plugged in, all
settings are preserved,
and the position is
updated.
At the beginning of each
working session, set the
datum in Absolute mode,
then switch the A50 to
Incremental mode.
By using the A50 in this
way, you will be able to
return the machine to its
absolute datum at any
time, by simply switching
back to Absolute mode.
If you are using
Segmented Error
Compensation, see
page 10 for details of the
datum setting procedure.
Newall Measurement Systems Ltd 5
In normal operation, the keys are used as follows:
·Press to toggle the display and keypad on and off.
·Press to toggle the display between inches
and millimetres.
·Press to toggle the A50 between absolute
and incremental mode.
Absolute mode
In this mode, the A50 will display the position
relative to an fixed datum.
Incremental mode
In this mode, theA50 can be used to display each
position relative to the last position. This is also
known as point-to-point use.
Setting the datum
·To zero the display at the current position:
press . All readings will now be relative to this zero point.
·To set the display to a known fixed point:
Example: to enter the value . All readings
will now be relative to this fixed point.
·If you make a mistake while entering a number, pressing will clear the entry one
character at a time.
·It is advisable to mark the Absolute Datum point physically on the machine , so as to be able to re-establish this
datum after power loss. See Digifind Page 6
NOTES
Digifind works only in
absolute mode.
Pressing in absolute
mode redefines the
datum.
Do not move the machine
when the A50’s power is
off.
When the power is
switched back on again,
the A50 uses Digifind to
automatically re-establish
the datum.
Entering a fixed point, or
using Centrefind, will
change the datum in
absolute mode - but
can still be used to return
to the old datum.
Using Setup Mode
SETUP
A50 Digital Readout SystemSETUP, Using setup mode
NOTES
Normally, Setup needs to
be done only once, and it
is possible that the factory
default settings are
suitable for your needs
without change.
If the power is already
switched on, pressing
will enter
setup mode.
If you have entered setup
mode in this way, you will
need to press twice
to return to normal
operating mode.
Newall Measurement Systems Ltd 7
Setup mode is accessible immediately after the power has been switched on, as follows:
When power is applied, the A50 will go through a brief self-test routine. The display shows the model
number, then the software version number, all segments and indicators light momentarily, after which the
A50 is ready for use.
·To enter Setup mode, press anytime before the self-test finishes.
·At the end of the test, the display will read . Press any key to continue.
There are five options that can be configured:
Option Default Display
Encoder type Spherosyn
Resolution 0.005mm
Direction 1
Radius / Diameter Radius
Error compensation Off
To cycle through the options, press . Each option is described in detail on the following pages.
When you have finished setting all the options, press to return the A50 to normal operating mode.
Resolution
Encoder Type
NOTES
The Encoder setting
must match the actual
encoder in use, or the
A50 will not display the
measurement correctly.
There are three possible settings:
Spherosyn Microsyn 10
Microsyn 5
·Press to cycle between the four settings.
·Press to accept the setting and move on to the next option - Resolution.
The Resolution settings available will depend on the encoder, and also on the setting.
Display Spherosyn or Microsyn 5
Microsyn 10
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 to cycle between the four available settings.
·Press to accept the setting and move on to the next option - Direction.
Radius / Diameter
Direction
A50 Digital Readout SystemSETUP, Direction, Circle measurement
Newall Measurement Systems Ltd 9
The Direction setting allows you to match the A50 to the actual direction of travel of the machine.
alternative settings
·Press to cycle between the two settings.
·Press to accept the setting and move on to the next option - Radius / Diameter
Selecting the Diameter setting causes the A50 to display double the actual scale / machine movement
radius
diameter
·Press to cycle between the two settings.
·Press to accept the setting and move on to the next option - Error Compensation.
SETUP NOTES
The Direction setting is
quite arbitrary. Set it to
whichever makes most
sense to the job.
The Diameter setting is
useful for lathes, and
other turning applications,
to display diameter, rather
than radius.
Error Compensation
NOTES
If error compensation is
applied, it is important
that it is absolutely
correct, If 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 to a
length of high importance.
It can be as small as one
segment.
There are three possible settings:
off
linear error compensation
segmented error compensation
·Press to cycle between the three settings
·If you select linear compensation or segmented compensation, pressing will take you to the
individual settings for the compensation method chosen, described below.
Linear compensation
In this mode, a single constant
correction factor for the scale can
be applied
t
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