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Related Manuals for ACU-RITE DRO 200E
Summary of Contents for ACU-RITE DRO 200E
- Page 1 ™ DRO 200E REFERENCE MANUAL...
- Page 2 Readout Parameter Access Code An access code must be entered before machine-related parameters can be set or changed. This prevents inadvertent adjustments to the setup parameters. IMPORTANT The access code is 8891 Refer to the Setup section. Begin by pressing the key.
- Page 4 ACU-RITE will, at its option and expense, repair or replace any part of the ACU-RITE product that fails to meet this warranty. This warranty covers both materials and factory labor. In addition, authorized ACU-RITE service representatives will provide service labor (field service) for a period of one year at no charge.
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Page 6: Table Of Contents
DRO 200E Table of Contents Introduction........................1 A Tour of the Readout....................1 Front and Back Views....................1 Keypad ........................2 Displays........................3 Power-On Position Recovery ..................4 Position-Trac ......................4 Readout Operations....................... 5 Clear Key........................5 Absolute and Incremental Displays ................5 Absolute Display.......................5 Incremental Display ....................5 Burn Depth Display ......................6... - Page 7 DRO 200E This symbol alerts you to the fact that important information concerning installation and operation of this readout has been included in this manual. Keep these instructions in a secure place for future reference.
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Page 8: Introduction
ACU-RITE’s DRO 200 readout series provides application-specific features required for you to obtain the most productivity from your manual machine tools. The DRO 200E is designed specifically for EDM applications. Special features include a special EDM display, retract relays, and dwell capabilities. -
Page 9: Keypad
Introduction DRO 200E Keypad Selects absolute or incremental display English / metric System setup INCR SETUP conversion parameters Used to locate centerlines Enter all numeric values with these Begin a preset Zero an axis display ZERO ZERO ENTER CLEAR ZERO... -
Page 10: Displays
DRO 200E Introduction Displays At the top of the display window is a row of indicators. These tell you the current state of the readout. EDM MM INCR ABS ZERO SET Lets you know when Appears when Tells you when the... -
Page 11: Power-On Position Recovery
Power-On Position Recovery Position-Trac Certain ACU-RITE encoders, such as the ENC 150, contain closely-spaced reference marks that enable the display to show the correct position after a power interruption. The readout will indicate when power has been lost, and will prompt you to move each axis until a reference mark is located. -
Page 12: Readout Operations
DRO 200E Readout Operations Readout Operations Clear Key Use the key to erase digits that you entered by mistake, or to take you back if CLEAR you’ve pressed a wrong function key. Absolute and Incremental Displays Absolute Display Shows the distance from your current position to absolute zero. -
Page 13: Burn Depth Display
Readout Operations DRO 200E Burn Depth Display To help you monitor the progress of a burn, press the key. All three DISPLAY displays show you something about the Z axis: • the top display shows the current position "Live" Z axis position Lowest burn depth •... -
Page 14: Zeroing The Displays
DRO 200E Readout Operations Zeroing the Displays Absolute Zero On many prints, dimensions are measured from one or two surfaces of the workpiece. By setting the readout’s absolute display to zero at a well- chosen surface, you can enter the part’s dimensions directly from the... -
Page 15: Zeroing Using The Spark Detector
ENTER Zeroing Using the Spark Detector If you set zero using the ACU-RITE spark detector, you can easily compensate for electrode erosion from one burn to the next. Preset the depth of the burn from the top of the workpiece. -
Page 16: Zeroing At A Center Line
DRO 200E Readout Operations Zeroing at a Center Line Begin setting absolute zero in the usual way, and then tell the readout that you want to use the centerline feature. INCR ZERO Touch the first edge… ENTER …then the second edge. -
Page 17: Presetting
Readout Operations DRO 200E Presetting When you preset a dimension, the readout places an incremental zero at the location you specify. Then the display automatically switches to the incremental display so that you can move to zero. Begin a preset by pressing an axis key ( for example). -
Page 18: Absolute And Incremental Presets
• absolute presets for absolute dimensions • incremental presets for incremental dimensions. When you enter an absolute preset, it does not matter where the tool position is. The DRO 200E calculates the desired location automatically. ENTER INCR ENTER ENTER 0.72 1.44... -
Page 19: Center-Line Presets
Readout Operations DRO 200E Center-line Presets You can set a preset at the center of a workpiece, or in the center of a hole. Move to the first edge... ENTER 0.000 INCR Sets an incremental zero at the tool location. -
Page 20: Using The Ram Retract Feature
Readout Operations Using the Ram Retract Feature The DRO 200E provides a very flexible retract mechanism which can be configured to a wide variety of EDM control schemes. Your particular EDM machine may not have all of the features described below. -
Page 21: Dwell
Dwell Until Sparkout With the ACU-RITE spark detector connected to the readout, you can set the dwell to last until sparkout is detected. The sparkout condition is determined by measuring the time between sparks. When this time becomes long enough (greater than the S-TIME parameter), the dwell cycle ends and the ram retracts. -
Page 22: Setup
DRO 200E Setup Setup key lets you change the system parameters. Some of these parameters SETUP are job related, meaning that they may change from job to job. Others are machine related and should be set as part of the installation. The machine-related... -
Page 23: Job Setup Parameters
Setup DRO 200E Job Setup Parameters Display Resolution The display resolution will be the same as the encoder resolution. If the job tolerance is coarser than the encoder resolution (±0.005 for example), you can adjust the display resolution so you won’t be tempted to waste time by machining to a finer resolution. -
Page 24: Linear Error Compensation
DRO 200E Setup Linear Error Compensation Segment 1 Segment 2 Segment 3 includes a linear error DRO 200E compensation feature that enables you to Machine table front view compensate for machine tool inaccuracies. (slightly exaggerated) You can have up to three different compensation segments per axis. -
Page 25: Installation
• C (32° to 104°F) with a non-condensing relative humidity of 25% to 85%. Proper Mounting ACU-RITE has developed special mounting kits for the readout which address the most common mounting requirements. Mounting kits include: • Column and base machine mountings •... - Page 26 DRO 200E Installation Connecting the Encoders Insert the connector from each encoder into the mating connector on the back of the readout. Fasten it with a small screwdriver. Encoder input 1 will be displayed in the readout’s top display, input 2 in the next display, and input 3 in the bottom display.
- Page 27 Installation DRO 200E Checking Voltage and Connecting Power CAUTION Connecting the readout to a power source outside of the acceptable range, or making an inappropriate setting with the voltage selector, may damage the readout, the encoders, or both. Check that the voltage available at the power source is within specification before connecting it to the readout.
- Page 28 DRO 200E Installation Connecting the Output Relays The readout has two output relays: • The retract relay indicates to the control that the ram has reached the retract position. The operator can set the length of time this relay is activated. The minimum time is 0.1 sec.
- Page 29 Installation DRO 200E Relay Timing Diagrams Retracting Without Using the Dwell Function The readout’s key lets the operator ENABLE • change the time (R-TIME) that the retract relay is energized, or • enter a Z-TOP position. When a Z-TOP position has been entered, the retract relay will be energized at the preset retract point, and will stay energized until the ram reaches the Z-TOP position.
- Page 30 DRO 200E Installation Retract with Dwell When the electrode reaches the targeted retract position, the ram can be held in that position. This dwell can be for a specified period of time, or it can be determined by a sparkout condition. The...
- Page 31 Installation DRO 200E Retract After Dwell Dwell Relay Dwell time expires Z = targeted depth. Dwell time starts. 0.1 sec. Energized until either delay after R-TIME or Z-TOP Dwell relay condition is satisfied Retract Relay Forced off for 0.1 sec. when Dwell relay de-energizes "Micro switch"...
- Page 32 DRO 200E Installation Retract After Sparkout Spark Sparkout time, set by Sparkout time expires operator Dwell Relay Z = targeted depth. Dwell time starts. 0.1 sec. Energized until either delay after R-TIME or Z-TOP Dwell relay condition is satisfied Retract Relay Forced off for 0.1 sec.
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Page 33: Readout Specifications
TTL square wave signal in quadrature (90° nominal phase relationship) Maximum input rate: 50 kHz Reference signal: TTL square wave Edge finder input Compatible with ACU-RITE electronic edge finder and First Spark Detector Size 12.5”W x 5.125”D x 6.5H” Weight 7.5 lbs. -
Page 34: Troubleshooting
Troubleshooting This section is intended to provide you with some basic troubleshooting assistance with your readout system. If you cannot correct the problem after following these instructions, contact your authorized ACU-RITE distributor for repair or replacement procedures. No Operation NOTICE If you turn power off, you must wait at least 5 seconds before turning it back on, or the readout may not power up. - Page 35 Troubleshooting DRO 200E Incorrect Operation If system positioning does not seem to be repeatable, the problem could be with the machine tool or with the readout system. • Check the machine tool. Check that the table is not locked. Ensure that the knee, ram, head bolts, turret-to-column bolts, and head-to-knuckle bolts are properly secured.
- Page 36 DRO 200E Troubleshooting Working memory—the memory used by the readout for calculations is faulty. While it may be possible to use the readout, it’s position display and other information will not be reliable. MEMORY FAILURE [2] – PRESS CLEAR CAUTION The readout cannot be relied on for correct operation if any memory failure is indicated.
- Page 37 Troubleshooting DRO 200E Keypad test Begin by pressing the key, then press each key (except the key) in turn to verify that it is functioning properly. When a key is pressed, the X- axis activates a “plus sign” indicator and increments a count. When you release the key, the plus sign disappears.
- Page 38 DRO 200E Troubleshooting • If the problem remains in the same display, the readout is in error. • If the problem follows the connection change, the linear encoder may be in error. Refer to the Checking the Linear Encoders section of your encoder reference manual.
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Page 39: Printed In Usa
ACU-RITE Readout Systems are manufactured in the USA ACU-RITE IS AN ISO 9001 CERTIFIED MANUFACTURER ACU-RITE INCORPORATED ONE PRECISION WAY MASON INDUSTRIAL PARK JAMESTOWN, NEW YORK 14701 2001-710 EDITION C PRINTED IN USA...
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