EMS EM250 Series Manuel utilisateur
EM250
Operational and
Installation Guide
Professional Digital Readout
System for
Manually Operated Machine Tools
EMS (International) Limited
Brookfield Works : Canal Street : Littleborough, Lancashire, OL15 0HA, England
Telephone: +44 (0) 116 279 3035
e-mail: [email protected] : web: www.ems-i.co.uk
Contents Overview:
Page
Introduction 2
DRO Specifications 2
Please Read Before Proceeding 3
Quick Setup Guide 4
Machine Axis Conventions 7
Keypad Layout 8
Common Functions 9
ABS / Incremental mode (ABS/INC) 9
Inch / Metric Measurements 9
Zero an Axis Value 10
Set an Axis Value 10
Clear Entered Value 10
Half Function (Centre Find) 10
Shrink Function 11
Reference Function 11
Calculator 12
Lathe Functions 13
Radius / Diameter mode 13
Axis Summing 13
Lathe Tool Offsets 14
Milling Functions 17
Work-to-Zero 17
Sub-datums (SDM) 17
PCD (Pitch Circle Diameter) / Bolt-Hole 21
Line-Hole Function 23
Inclined Machining 25
Machining a Radius 28
Setting the Z-Step Method 28
Simple Radius Function (R-Function) 29
Enhanced Radius Function (Auto-R) 33
Common Keys 38
Machine Specific Keys 39
Encoder Connections 40
Power-up Sequence 40
EM250 Models 40
Trouble Shooting 41
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Introduction
Congratulations on selecting and purchasing a EM250 Series Digital Readout from EMS
(International) Ltd. We take our products, their design and performance very seriously and
make every effort to provide you with a quality product to help simplify the many operations
possible and improve productivity.
The EM250 Series DRO is designed to quickly meet the needs of both users of lathes and
milling machines and comes in versions specific to those types of machines. This allows for
machine specific functions to be readily available without the complexity of added buttons
that can never be used as so often found on generic DRO where they include both lathe and
milling functions in a single unit to keep a lower inventory.
If you would like to make any comments or share your experience of using our equipment
we would very much like to hear from you. Please e-mail us at: [email protected].
Note:
Please familiarize yourself with the contents of thus operators manual
before installing the DRO to ensure a easy installation.
Due to a process of continual development EMS (International) Ltd.
reserve the right to change specifications without prior notice.
DRO Specifications
Mains Power 110-230 VDC @ 50/60Hz (15W)
Storage Temperature -20oC to +70oC
Operating Temperature 0oC to +40oC
Dimensions 190 x 290 x 109mm
Weight 3Kg (approx. With swivel mount)
Encoder Input EIA422 Full Differential
Encoder Connection 9-Pin D-Type Female
Display Resolutions 0.001, 0.005, 0.010mm
Axis Display Type 7-Segment (Green) LED with +/- and decimal point
Information Window 13-Segment (Green) LED
Quantization Error +/- 1=Digit
Standard Compliance EMC and Low Voltage Compliance BS EN 61326,
RoHS
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●The EM250 DRO is sophisticated piece of electronic equipment and should be carefully
handled and installed in order to avoid any potential damage.
●The rated supply to DRO should be within specified limits and should not be exceeded
under any circumstances. Doing so may cause irreversible damage to DRO.
●DRO should be opened by authorized person only. Otherwise it will invalidate the
warranty of the unit. If in any doubt or you believe the unit requires servicing please
contact [email protected] for assistance.
●It is highly recommended that the Equipotential Point (Ground) should be connected to
avoid potential for erratic operations through electrical noise in the working
environment.
●Cable routing of DRO and encoders should not be routed through or nearby high
capacity switching/inductive load or where it can cause danger. Avoid routing cables
with those of the motor, lighting or other such sources of potential RF and electrical
noise.
Please Read Before Proceeding
Warranty will be considered void if and not limited to:
Failing to meet manufacturers specified supply conditions.
Abusive handling.
Environmental conditions outside of Manufacturers specifications.
Manipulation, tampering of electronics.
Replacement of original parts with other parts than specified by manufacturer.
Used with encoders other than those supplied by the manufacturer.
Disposal
At the end of its life the EM250 DRO and systems should be disposed of in a safe an
environmentally sympathetic manner as applicable to local legislation. The casework and
other components may be suitable for recycling. DO NOT BURN.
Encoder Connections
Equipotential
Terminal
Tilt Mounting (M10)
IEC Mains Input
DRO On/Off Switch
- 3 -
Fuse (1A, 15W)
The EM250 DRO Setup parameters allow you to configure your DRO for the encoders fitted
to you machine. You only need to do this the once as the settings will be retained by the
DRO. You can edit them at anytime, should a need arise, by re-entering Setup. All parameters
must be entered in METRIC.
Navigate to the parameter you wish to set using the keys by the message window.
To exit setup from a menu item press the [D] key until “EXIT” is displayed and then press
Quick Setup Guide
To Enter Setup and configure your DRO:
●With the power OFF
●Press and hold the [6] key for Lathe
●Turn power ON. DRO will start up.
●Wait until the display shows “EXIT”
●Release Number key
The Setup options vary slightly between Lathe and Mill DRO
Function: This function is used on 2-axes Mill DRO’s by the Inclined machining and Arc
contouring functions to simulate a Z-axis input by calibrating the DRO to the
resolution and turns of the Knee axis dial.
Operation: Press the key
The message display will show “ENTR PPM”
Enter the distance moved by the Z-axis for one Z-axis dial increment
Display shows: “DIAL INC” Default: 0.200
Measure the movement of the table
for one Z-axis dial increment.
You can either take this straight off the dial or for a more accurate result use a dial gauge from the spindle to
measure the true physical movement.
If your 2-axes Mill only has a Quill
and not a Knee then set this as the
smallest resolution you can
accurately move the Quill.
1 Thou = 0.0254mm (25.4 m)
- 4 -
Function: Used to set the DRO resolution to that of the connected scales.
Operation: Press the key to enter the function. The axes windows will display their
current resolution settings.
Press the axis key for the axis you want to change. e.g.
This will toggle through the available options against that axis:
Options are: 0.001, 0.005, 0.010mm
When set as required press the key to return to the main setup menu
Display shows: “RESOLUTE” Default: 0.005
Function: Used for mould making this setting enables/disables the DRO automatic
Shrink compensation function.
Operation: Press the key to toggle between “SRK. OFF” and “SRK. ON”
LED Shows function
is enabled
Display shows: “SRK. OFF” / “SRK. ON” Default: “SRK. OFF”
Function: This function is used to reset the DRO to its factory default settings.
Any changes made will be lost and need to be re-entered.
Operation: Press the key
Wait until “CLR OK” is displayed
Display shows: “ALL CLR”
Function: This function is used on 2-axes Mill DRO’s by the Inclined machining and Arc
contouring functions to simulate a Z-axis input by calibrating the DRO to the
resolution and turns of the Knee axis dial.
Operation: Press the key
The message display will show “ENTR PPM”
Enter the distance moved by the Z-axis for one complete turn of the Z-axis
handle.
Display shows: “Z DIAL” Default: 2.500
Measure the movement of the
table for one complete rotation
of the Z-axis handle.
Setup parameters are saved as you enter them. If you do make an error or wish to to change them you can
go back and so so at any time.
If your 2-axes Mill only has a Quill,
and not a Knee, then set this as a
large number greater than the
Quill total travel.
- 5 -
Display shows: “R OR D” Default: 0 (radius)
Function: Used to set enable an axis so it can display in Diameter mode.
Setting an axis to “1” means that axis will display double (diameter) when the
is pressed in normal operating mode. This is important for Lathes where
position needs to relate to the part diameter.
Operation: Press the key to enter the function.
The axes windows will display their current settings.
Press the axis key for the axis you want to change. e.g.
This will toggle through the available options: “0” or “1”
When set as required press the key to return to the main setup menu
Display shows: “LIN COMP” Default: 0.000
Function: This is used to setup a linear compensation factor for scales that may not be
mounted parallel to the axis of the machine.
THIS SHOULD ONLY BE USED WHERE OBVIOUS LINEAR ERRORS ARE OBSERVED
The function works by multiplying the measurement from the scale/encoder
by a constant factor in PPM (Parts Per Million = microns/meter).
Example:
Scale measures 500.040 : True measurement is 500.000
error = 0.080mm over 1m, or 80PPM
Operation: Press the key to enter the function. The axes windows will display the
current settings. Press the axis key for the axis you want to change. e.g.
Enter the value using the numeric keys
You can change the sign of the compensation using the key
Press the key when you have finished entering the compensation value.
Repeat for each axis.
When set as required press the key again to return to the main setup menu
Display shows: “DIRECTE” Default: 0
Function: This is used to define the positive direction of travel for the machine axis
Operation: Press the key to enter the function. The display will show “SEL AXIS”.
Press the axis key for the axis you want to change. e.g.
This will toggle between the options “0” and “1”.
Setting to “1” will reverse the natural count direction from the scale.
When set as required press the key to return to the main setup menu
Measuring system and machine
axis of travel are not parallel
Scale Movement
α
- 6 -
-X
+X
+Z
-Z
+Z
-Z
-Y
+Y
Knee
Quill
Display shows: “BEEP ON” / “BEEP OFF” Default: “BEEP ON”
Function: This is used to disable the key beep if so required
Operation: Press the key to toggle between “BEEP ON” and “BEEP OFF”
Display shows: “EXIT” Default: “N/A
Function: This is used to exit from Setup. Note any changes made will be saved
Operation: Press the key to exit back to normal operation mode.
Machine Axis Conventions
-X
+X
-Z’
+Z’
-Z
+Z
On a lathe we have an X-axis (being the
cross-slide) and a Z-axis (the travel
between centres).
The top-slide can be rotated from
parallel to the X-axis to parallel with the
Z-axis through any angle. This is known
as the compound or Z’ axis. See axis
Summing later in this manual.
With milling machines we have the X, Y
and Z-axis. The X & Y-axis refer to the
table movement left-right and in-out.
The Z-axis can be either the Quill axis,
direct movement of the tool up-down
or the Knee axis which is the movement
of the whole table up-down.
On smaller machines the Z-axis can also
be the movement of the machining
head up-down independent of the tool
movement. As such it is quite possible
for a milling machine, of all sizes, to
have 4-axes of which two are vertical
movement.
-Y
+Y
+X
-X
-Z -Z
+Z
+Z
Mini Mill
Knee Mill
- 7 -
Keypad Layout
2-axes Lathe DRO 2-axes Milling DRO
3-axes Lathe DRO 3-axes Milling DRO
The EM250 DRO is available in 2-axes and 3-axes options in both Lathe and Milling specific
variants. This allows for the functions specific to those machine types to be readily available,
whilst not overcomplicating the display keypad with buttons you will never use.
Quick axis zero keys
Axis Set keys
Axes Position
Windows (Tinted)
Message Window
Navigation Keys
Special Function Keys
Calculator keys
Calculator Memory
Parameter Enter Key
Half Function
Clear Value
Tool/Point
Display
Function Keys
Tool/Point
Selection
Wipe Clean Membrane
Tactile keypad
Numerical Keypad
- 8 -
Table des matières
