DRO 200T™ REFERENCE MANUAL
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 8 , 8 , 9 , 1 , and displayed, press the ready for machine parameter setting operations. SETUP ENTER key. When “SETUP” is keys.
Warranty ACU-RITE Products and accessories are warranted against defects in material and workmanship for a period of three years from the date of purchase. 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.
DRO 200T Table of Contents Introduction..................................................................................................................... 1 A Tour of the Readout..................................................................................................1 Front and Back Views...............................................................................................1 Keypad ..........................................................................................................
DRO 200T ! This symbol alerts you to the fact that important information concerning the installation and operation of this readout has been included in this manual. Keep these instructions in a secure place for future reference.
DRO 200T Introduction 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 200T is designed specifically for turning applications. Special features include radius/diameter conversion, a tool offset library, and an axis lock feature.
Introduction DRO 200T Keypad Selects absolute or incremental display ABS INCR Selects radius or diameter display RAD DIA Locks the display so you can move the tool without losing position LOCK AXIS Begin a preset English / metric conversion MM Enter all numeric values with these X ZERO Z1 ZERO Z2 ZERO Zero an axis display SETUP 7 8 9 4 5 6 1 2 3 .
DRO 200T Introduction Displays At the top of the display window is a row of indicators. These tell you the current state of the readout. MM Appears when setting an absolute zero. Appears when you’re positioning in metric, dark when you’re positioning in inches. DIA INCR ABS ZERO SET Lets you know when you are setting a preset or an absolute zero. Tells you when the crossfeed axis is displaying the part’s diameter. These tell you if the position display is incremental or absolute.
Introduction DRO 200T 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. By traversing the reference marks once in each axis, you will re-establish the display position relative to the last known zero.
DRO 200T Readout Operations Readout Operations Clear Key Use the CLEAR key to erase digits that you entered by mistake, or to take you back if you’ve pressed a wrong function key. Absolute and Incremental Displays Absolute Display Shows the distance from your current position to absolute zero. Absolute Zero, also called datum or Workpiece Zero. The tool is positioined at 1.625 ABS. -1.625 Z -0.625 ABS Incremental Display Shows the distance from your current position to incremental zero.
Readout Operations DRO 200T Automatic Display Switching Sometimes the readout will switch from one display to another automatically. When you enter a preset, for example, the display switches to the incremental display so you can move to zero. Whenever the readout does an automatic display switch, INCR will appear in the display. Radius/Diameter Display RAD Pressing the DIA key lets you view a workpiece dimension either as a radius or as a diameter. 2.00 Dia 1.00 Rad X 1.000 RAD DIA 6 X 2.
DRO 200T Readout Operations Zeroing the Displays 3.00 Absolute Zero 1.75 1.00 On many prints, the dimensions are measured from one or two surfaces of the part. By setting the readout’s absolute display to zero at a well-chosen surface, you can enter the part’s dimensions directly from the print, using absolute presets. Absolute zero Setting Absolute Zero at the Current Position 1. Move to desired location. 2. Make sure that the absolute position is displayed. 3. Zero the appropriate axis.
Readout Operations DRO 200T Crossfeed Axis 1. Touch the tool to the diameter of the workpiece. 1.25 2. Make sure that the absolute position is displayed. 3. Press the 4. ZERO key for the appropriate axis. ABS INCR ZERO Enter the tool position—either as a radius or as a diameter, depending on the display. 1 .
DRO 200T Readout Operations Setting Absolute Zero with the Tool under Load Longitudinal Axis 1. Make sure that the absolute position is displayed. 2. Machine the face of the workpiece. 3. While the tool is still contacting the workpiece, press the ZERO ABS INCR key for the appropriate axis, then the LOCK AXIS key. The readout will lock this tool position in the display, even if you move the tool. 4. Move the tool away and measure the face location, if required . .83 5.
Readout Operations DRO 200T Crossfeed Axis 1. Make sure that the absolute position is displayed. 2. Machine the diameter. 3. While the tool is still contacting the workpiece, press the ABS INCR key for the ZERO LOCK appropriate axis, then the AXIS key. The readout will lock this tool position in the display, even if you move the tool. 4. Move the tool away and measure the diameter. Dia = 1.05 5. Enter the diameter. 1 .
DRO 200T Readout Operations 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 you can move to zero. Begin a preset by pressing an axis key ( X for example). The information from the previous preset will appear. The display will show you if the preset is absolute ABS or incremental. Use the INCR key to change from one to the other. Then enter the dimension you want to preset.
Readout Operations DRO 200T Absolute and Incremental Presets To maintain the best tolerance and to minimize the chance for errors, use • 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 200T calculates the desired location automatically. 3.00 1.75 ABS INCR Z 1.00 +/- 1 . 0 ENTER 5 ENTER Z +/- 1 . 7 Z +/- 3 .
DRO 200T Readout Operations Tool Offset The DRO 200T can store the dimensional offsets for up to 10 tools. When you change a workpiece and establish the absolute zero, all the tools are automatically referenced from the new zero. 1 2 3 4 ... 0 9 The offset dimensions can be found using a tool presetter, or you can determine them using the auto-offset calculation feature of the readout. In Setup you determine which method you wish to use. Defining Tools with the Auto-Offset Calculation Feature 1.
Readout Operations 5. DRO 200T Move the tool away from the workpiece and measure the diameter of the workpiece. Dia = 1.05 6. Select the axis and enter the measured value. X 7. 1 . 0 5 ENTER Press the define key again, and make a face cut. DEFINE .83 LOCK AXIS 8. While the tool is still in contact with the workpiece, press the key. 9. Move the tool away from the workpiece, and measure the length of the shoulder. .83 10. Select the axis and enter the measured value. Z .
DRO 200T Readout Operations Defining Tools with a Tool Presetter Use a tool presetter to obtain offsets in X and Z for your tools. If you wish, you may select a tool to be a reference tool. Then you can use a tool presetter to obtain the differences, in X and Z, between the reference tool and the other tools. Z=0 The reference tool does not have to be Tool 0, and its offset values do not have to be 0,0 X=0 0 1 Then, select each tool and define its offset. USE USE 1 2 DEFINE DEFINE X +/- .
Setup DRO 200T Setup The SETUP key lets you change the system parameters. Some of these parameters 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 parameters can be accessed by pressing: SETUP Access Code ENTER Use the X key to move from one parameter to the next. After the last parameter, the X key ends the setup process and saves any changes.
DRO 200T Setup 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. Use the Z key to cycle through all the possible choices. The choices available depend upon the resolution of the encoders. Scale Factor You can define a scale factor for each axis.
Setup DRO 200T Linear Error Compensation The DRO 200T includes a linear error compensation feature that enables you to compensate for machine tool inaccuracies. You can have up to three different compensation segments per axis. Segment 1 Segment 2 Segment 3 Machine bed side view (slightly exaggerated) You will need a dial indicator and a measurement standard. 1. Enter the number of segments you will use. If you do not want to use any error correction, enter 0. Press X to start the first segment. 2.
DRO 200T Installation Installation IMPORTANT Before installing the DRO 200T readout, record the serial number on the warranty card and return it to ACU-RITE INCORPORATED. The serial number label is located on the back of the readout. Selecting a Location Selecting a location for the readout is an important consideration for proper installation.
Installation DRO 200T 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, if any, in the bottom display. Provide enough slack in the encoder cables to allow for full travel of all machine axes. Check that machine movements will not pinch the cables.
DRO 200T Installation 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. If required, set the voltage selector to match the line voltage. 1.
Readout Specifications DRO 200T Readout Specifications Characteristic Specification Operating conditions 0° to 40°C (32° to 104°F) 25% to 85% relative humidity (non-condensing) Storage conditions -40° to 60°C (-40° to 140°F) 25% to 95% relative humidity (non-condensing) Input requirements Voltage: 115VAC or 230VAC (+/-20%), single phase Frequency: 47-63 Hz Current: 300ma @115V, 150ma @230V Fuse 115V operation: ½ A, 250V, 3AG, Slo-blo 230V operation: ¼ A, 250V, 3AG, Slo-blo Encoder input Pos
DRO 200T 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 or OEM/OEI 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.
Troubleshooting DRO 200T 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 saddle is not locked. Ensure that the turret-to-column bolts are properly secured. Check the gib adjustments. Check spindle run-out. • Check linear encoders. Check each encoder and reading head for proper installation. Ensure that the mounting brackets are secure.
DRO 200T 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. The readout should be serviced immediately. Program memory—the memory used to store the software is faulty.
Troubleshooting DRO 200T Keypad test. Begin by pressing the X key, and then press each key (except the X 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. Display test. Begin by pressing the X key. All indicators in all displays will light. Visually check each portion of each display to ensure that they are functioning properly.
DRO 200T 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. Display overflow errors are indicated by dashes in all digits in an axis display. A numeric overflow occurs when the intended measurement is too large for the eight-digit display.
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 2001-706 EDITION A PRINTED IN USA
