EMS EM250 Series Operational And Installation Manual

Professional digital readout system for manually operated machine tools

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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: info@ems-i.co.uk : web: www.ems-i.co.uk

Table of Contents

Summary of Contents for EMS EM250 Series

Page 1 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: info@ems-i.co.uk : web: www.ems-i.co.uk...
Page 3: Contents Overview
Contents Overview: Page Introduction DRO Specifications Please Read Before Proceeding Quick Setup Guide Machine Axis Conventions Keypad Layout Common Functions ABS / Incremental mode (ABS/INC) Inch / Metric Measurements Zero an Axis Value Set an Axis Value Clear Entered Value Half Function (Centre Find) Shrink Function Reference Function...
Page 4 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...
Page 5: Please Read Before Proceeding
● 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 info@ems-i.co.uk 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.
Page 6 Quick Setup Guide 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.
Page 7 Display shows: “Z DIAL” Default: 2.500 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. If your 2-axes Mill only has a Quill, and not a Knee, then set this as a Operation: Press the...
Page 8 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.
Page 9 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.
Page 10: Keypad Layout
Keypad Layout 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. Wipe Clean Membrane Message Window Tactile keypad...
Page 11: Common Functions
Common Functions This section goes through the functions that are common between the Lathe and Mill DRO versions. Please read through this manual to ensure an understanding of these operations. Absolute / Incremental mode (ABS / INC) Absolute mode displays the positions of all axes from a fixed datum. This is useful as it allows a defined datum for a given job.
Page 12 Zero an Axis Value This function allows for the axis value to be quickly set to zero at any position. For this we can use the round Quick access axis zero keys. Can be used in both ABS and INC modes. If used in ABS mode a new datum will be established.
Page 13: Reference Function
This function allows user to set a machine zero datum and can be applied to each axis. With this machine zero point users can restore the work coordinates even if the machine is moved when the DRO is in OFF condition. Generally ems-i each encoder has reference marks present at periodic interval (for most scales this would be every 50mm) or at the scale centre of travel.
Page 14: Calculator Function
Calculator Function The EM250 has a comprehensive set of calculator functions which also includes trigonometric calculations. What makes this calculator more useful is that axis values can be selected as part of the calculation and the result can also then be transferred back in to a chosen axis. Enter the DRO Calculator: The axes values are still displayed.
Page 15: Lathe Functions
Lathe Functions The EM250 DRO has a number of functions to assist in turning. These functions are described in more detail in this section. Radius / Diameter mode Generally on a lathe we want to operate the cross-slide (X-axis) in Diameter mode as that reflects on the dimensions of the part being turned.
Page 16 The EM250 series DRO supports 99 such tool offsets for operation in ABS mode. Whilst in many cases it is just as easy to datum each tool, as and when it is used, Tool Offsets allow for the pre-configuring of a tool post with multiple tools.
Page 17 Example: Set Tool-Offset to 10.5mm for Tool #1 (Continued) IN OFFST The entered value is that of the measured RADIUS. TOOL FUN The Tool Offset is now defined. Can repeat this procedure to set other Tool Offsets by simply selecting the next tool to set by using the Tool navigation keys.
Page 18 Selecting a Tool-Offset: (Continued…) The desired Tool Offset can be selected using the Tool navigation keys or by typing the desired tool number in directly using the numeric keypad. Example: Select Tool #5 IN TOOL IN TOOL There is no need to press the enter key as we are in Tool use mode.
Page 19 Milling Functions The EM250 DRO has a number of functions to assist in Milling operations. These functions are described in more detail in this section. Work-to-Zero Before we start looking at the functions in depth it is worth noting that the EM250 DRO, like all DRO operates on a principle, within functions, known as Work-to-Zero.
Page 20 Define a SDM pattern: (Teach method) Continued… SDM MODE SDM MODE Select SDM #2, zero the axes and in so doing define the offset co-ordinate of SDM #1. SDM MODE SDM MODE Still on SDM #2, move to the desired SDM #2 co-ordinate. SDM MODE SDM MODE Select SDM #3, zero the axes and in so doing define the offset co-ordinate of SDM #2.
Page 21 Define a SDM pattern: (Direct Entry method) Enter ABS mode, move to desired workpiece datum and set this as the datum by zeroing the axes. SDM MODE SDM MODE The displayed value after pressing [enter] will be of Select SDM #1, and enter the desired co-ordinate. opposite sign.
Page 22 Enable SDM Mode Method #1: Use the SDM navigation keys. Pressing these keys will automatically enable SDM mode. Example: Select SDM #2 SDM MODE Navigating to SDM #0 will disable SDM mode. Method #2. Direct SDM selection Example: Select SDM #5 SDM MODE The values in the axis will reflect the current offset-from zero for the selected datum.
Page 23 PCD (Pitch Circle Diameter) / Bolt-Hole The EM250 PCD calculator operates on the work-to-zero principle for the machining of a regular series of holes around a datum. This datum is entered as the centre of the circle to be machined. Complex hole patterns can be achieved easily without the need of detailed trigonometric calculations as these are all performed by the DRO.
Page 24 PCD (Pitch Circle Diameter) / Bolt-Hole: Continued… Move to Number of Holes entry and enter value. No. HOLE No. HOLE Move to Start Angle entry and enter value. ST. ANG ST. ANG Move to End Angle entry and enter value. END ANG END ANG Once all the parameters have been entered you can check them by going back through them using the...
Page 25 Exit from PCD Function To exit from the PCD function simply press the key again. The parameter values programmed in to the PCD function are saved to the DRO memory so that they can be recalled even after the DRO has had the power turned off. Simply reselect the PCD function and you can then simply check the parameters, or edit them as may be required for a new pattern.
Page 26 Line-Hole Function: Continued… Enter the line angle. Use the Message Navigation keys Enter the line number of holes. NO. HOLE NO. HOLE Once all the parameters have been entered you can check them by going back through them using the navigation key .
Page 27 Exit from the Line-Hole Function To exit from the Line-Hole function simply press the key again. The parameter values programmed in to the Line-Hole function are saved to the DRO memory so that they can be recalled even after the DRO power is turned off. Simply reselect the Line-Hole function and you can then simply check the parameters, or edit them as may be required for a new pattern.
Page 28 Inclined Machining: Continued… Navigate to the plane Angle entry and enter the required value. INCL INCL Navigate to the Max Cut entry and enter the required value. MAX CUT MAX CUT Once all the parameters have been entered you can check them by going back through them using the navigation key .
Page 29 The following is the operating mode on XZ & ZY Plane on 3-axes DRO. The message window will show the current plane of AUTO operation and the X-axis display is left aligned to indicate that it is operating in a special mode. Move the Z-axis by the programmed Max-Cut value.
Page 30 Check ABS position whilst performing Inclined Machining (ALL DRO) If at any time whilst in the Inclined Machining function you would like to check the standard ABS position, relative to the workpiece datum this can be done using the key. The function remains active in the background. Once you have checked the positions re-enter the Inclined machining function mode by again pressing the key.
Page 31 Simple Radius Function (R-Function) The EM250 R-Function operates on the work-to-zero principle for the machining an radius. This is the simplest method for machining one of the eight most common arcs. For more complex arcs see the Auto-R Radius Function. The common types of arc are shown below.
Page 32 Simple Radius Function (R-Function): Continued… Enter the required ARC type with reference to the ARC Table. TYPE 1-8 Navigate to the Radius entry and enter the ARC Radius. Use the Message Navigation keys Navigate to the Tool Diameter entry and enter the Tool Diameter. (This can be 0.000 if cutting with tool tip) Tool dia Tool dia The following parameters may not appear on ALL plane selections / DRO types (2x / 3x).
Page 33 Simple Radius Function (R-Function): Continued… Once all the parameters have been entered you can check them by going back through them using the navigation key . Alternatively you can also start using the function immediately by pressing the key once more. The execution of the function varies between 2-axes and 3-axes DRO for the YZ &...
Page 34 Simple Radius Function (R-Function): Continued… The following is the operating mode on XZ & ZY Plane on 3-axes DRO. The message window will show the current plane of AUTO operation and the X-axis display is left aligned to indicate that it is operating in a special mode. If the message window displays “Z OU LI”...
Page 35 Enhanced Radius Function (Auto-R) The EM250 Auto-R function operates on the work-to-zero principle for the machining an radius. This mechanism if far more flexible than the R-Function but can be more complex to configure as the operator may need to perform some trigonometric calculations in order to determine some of the parameters needed by the function.
Page 36 Enhanced Radius Function (Auto-R): Continued… Navigate to the plane required and press key. The display will move to the ARC centre entry automatically. 2X.R CENT Enter the centre co-ordinates for the ARC and press CENT On 2-axes Mill the Z-axis entry is made in to the Y-axis Navigate to the ARC Radius entry and enter the required value and press.
Page 37 Enhanced Radius Function (Auto-R): Continued… Navigate to the Tool compensation entry and select the Tool Cut edge. R - Tool R + TOOL R + TOOL R - TOOL If you have a 3-axes Mill all the parameters have now been entered. Press the key to enter machining mode.
Page 38 Enhanced Radius Function (Auto-R): Continued… The following is only required for the XY Plane. (2-axis and 3-axis DRO) The message window will show the first machining Point with the X & Y-axis displays left aligned to indicate that it is operating in a special mode. Move the X-axis and Y-axis to .
Page 39 Enhanced Radius Function (Auto-R): Continued… The following is the operating mode on XZ & ZY Plane on 3-axes DRO. The message window will show the current plane of AUTO operation and the X-axis display is left aligned to indicate that it is operating in a special mode. If the message window displays “Z OU LI”...
Page 40: Common Keys
Common keys Below is a list of keys that can be found on both Lathe and Mill versions of the EM250 DRO. Description … Number keys [0] through to [9] Decimal point. Used with the number keys to enter a non-integer value, Used to change the sign of an entered number.
Page 41: Mill Functions
Machine Specific Keys Below is a list of keys that are specifically for the enhanced operation of the Lathe version of the EM250 DRO. Lathe Functions Description Used to set a Tool Offset compensation value Enable internal axis summing (3-axes DRO only) Toggle display between Radius and Diameter mode Used to enable/disable Tool-offset mode Mill Functions...
Page 42: Encoder Connections
On power-up the EM250 DRO will make a few ‘BEEPS’ and all the axis windows will cycle through the LED numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 and the message windows will show EMS-I. This is to test the beep and the LED displays. It also puts the DRO under maximum current load.
Page 43: Troubleshooting
● Change direction using Setup (See Quick Setup in this guide) ● Unfortunately from time to time an LED can develop a fault. Missing LED segments Please consult ems-i for a repair or replacement. ems-i If you experience any problems please contact and we will be glad to work with you on resolving any issues you may have.
Page 44 EMS (International) Limited Brookfield Works, Canal Street, Littleborough, Lancashire, OL15 0HA : England Telephone: +44 (0) 116 279 3035 e-mail: info@ems-i.co.uk : web: www.ems-i.co.uk...