LinearX LT360 User Manual
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LinearX LT360 User Manual

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User Manual

Computer Aided Engineering & Measurement Systems
Precision Turntable
All specifications subject to change without notice.
© 2006 All Rights Reserved.
Printed in the U.S.A.
March-30-2006
LinearX Systems Inc • 9500 SW Tualatin-Sherwood Rd. • Tualatin, OR 97062-8586 USA
TEL: (503) 612-9565 • FAX: (503) 612-9344 • www.linearx.com • sales@linearx.com
88
User Manual
PN: 910-0019
LT360 Precision Turntable
Precision Turntable
User Manual
LT360 Precision Turntable
User Manual
1

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  • Page 1: User Manual

    All specifications subject to change without notice. © 2006 All Rights Reserved. Printed in the U.S.A. March-30-2006 LinearX Systems Inc • 9500 SW Tualatin-Sherwood Rd. • Tualatin, OR 97062-8586 USA User Manual TEL: (503) 612-9565 • FAX: (503) 612-9344 • www.linearx.com • sales@linearx.com LT360 Precision Turntable...
  • Page 2 User Manual User Manual 9.3 Calibration Certificate (Example) LT360 Precision Turntable User Manual © 2006 LINEARX SYSTEMS INC. All Rights Reserved. Tel: (503) 612-9565 Fax: (503) 612-9344 Printed in the United States of America. March 30, 2006. This document was produced on a Pentium-4 / 2GHz PC with Win2K using Adobe PageMaker 7.0, Adobe Illustrator 10.0, Adobe PhotoShop 7.0,...
  • Page 3 IEC 60950/61010, UL-1950 ■ Copyright Ownership CISPR-22, FCC Class-B, Both the program and the documentation are protected under applicable copyright laws. LinearX is the holder of this Connector IEC-320 Universal AC Inlet copyright. Your right to use the program and the documentation are limited to the terms and conditions described herein.
  • Page 4 Threshold TTL, LVTTL This license agreement shall be governed by the laws of the state of Oregon and shall inure to the benefit of LinearX, its Hysteresis 0.75V successors, administrators, heirs and assigns or third party licensors.
  • Page 5 Center Through Hole source for user information and assistance regarding the use of this product. If these sources Diameter 1.5 Inches (38mm) do not contain the answers to your questions, contact LinearX via any of the following meth- ods: Platter Dimensions Height 0.75 Inches (19mm)
  • Page 6 User Manual User Manual 9.1 LT360 Mechanical Specifications Main System Operation Mount in any orientation, Ta 0° to 40°C Platter Cast & Machined Aluminum A356-T6 Base Cast & Machined Aluminum A356-T6 Bearing 5 Inch (125mm) Sealed Ball Bearing ABEC-1 4 Inch Diameter, 0.8 Inch Wall...

  • Page 7: Table Of Contents

    1.2 TS360 Safety ............. 12 1.3 LT360 Emergency Stop ..........13 Chapter 2: Mounting 2.1 Rubber Feet ............... 15 2.2 Mounting to the LT360 ..........16 2.3 Mounting to the Platter ..........17 2.4 Mounting to the Base ..........18 Chapter 3: Electrical 3.1 AC Power...
  • Page 8 6.1 Acceleration Functions ..........43 6.2 Velocity Profiles ............46 6.3 Actual Accel/Velocity Profiles ........47 6.4 Horizontal Torque Capability ........52 6.5 Vertical Torque Capability .......... 54 Chapter 7: Error Messages 7.1 Error Messages ............57 LT360 Precision Turntable LT360 Precision Turntable...
  • Page 9 ■ Test Clicking this button will open the Test dialog as shown below. This dialog provides a means to test the LT360 by rotating the platter for a Chapter 8: Application Software period of time, number of cycles, etc. It is mainly used by the factory during product testing and lubrication.
  • Page 10 Browse button. They will be located in the C:\Program Files\LT360\Firmware folder. Then click the Program button. Read and follow the dialog messages that appear. When the update is completed, the LT360 will reboot and the software program will close. LT360 Precision Turntable...

  • Page 11: Chapter 1: Safety First

    User Manual 1.1 LT360 Safety ■ Calibration The LT360 turntable should always be operated with care and Clicking this button will open the Calibration dialog as shown safety. Anything attached to the turntable will be in motion, below. Calibration is performed originally at the factory, and in most cases will be permanent and not be required again.

  • Page 12: Ts360 Safety

    LT360 and update the display. Updates will then when testing. continue if the platter is rotating until it stops. This feature is useful if the rotation of LT360 has been activated by some other means, such as the front panel switches. This will update the software display.

  • Page 13: Lt360 Emergency Stop

    RED switches on the The Step CW and Step CCW buttons will cause LT360 front panel, or on the the platter to rotate one step, either ClockWise or Counter ClockWise. LR360 remote module.
  • Page 14 User Manual ■ CPU Firmware This group box displays the version code and date of the 32bit CPU firmware in the LT360. Updating the firmware will change these fields. ■ LDR Firmware This group box displays the version code and identifier of the Boot Loader firmware in the 32bit CPU.

  • Page 15: Chapter 2: Mounting

    2.1 Rubber Feet A package of 8 rubber foot pads are provided with the LT360. Depending LT360 ANALOG OUTPUT MODES on how you intend to mount the LT360, you may or may not wish to use the optional pads. START...

  • Page 16: Mounting To The Lt360

    2.2 Mounting to the LT360 ■ Analog Output Mode The LT360 drive assembly consists of two aluminum castings, platter and base, joined through a 125mm ball bearing. The drive assembly provides This selection controls the operating mode for the Analog both high strength and high precision.

  • Page 17: Mounting To The Platter

    The platter is strongest in the center, and weakest at the rim. The fixture Otherwise the LT360 will be controlled by any noise received at the input. being attached to the platter should have its own rigid surface strength and not depend on that of the platter.

  • Page 18: Mounting To The Base

    BIPOLAR, the range will be 0.000 to ±1.800 volts. Both positive and GREASE PORT negative values are used. Voltages higher than the allowable range for the selected mode are invalid. The LT360 has a scale factor of 10mV/deg for the analog input/output. LT360 Precision Turntable LT360 Precision Turntable...
  • Page 19 70%. This will reduce heating in the motor and drive circuitry. The SmartTorque feature of the LT360 automatically reduces the motor torque to 1/2 its normal rotational power when it is not moving. This provides the advantages of maximum torque when in motion and reduced power consumption when stationary.
  • Page 20 ■ Information This group box displays the serial number and dates of the LT360 unit. In normal use the factory calibration will probably be adequate for continued use. If you have an application requiring periodic recalibration for NIST compliance, the unit can be recalibrated by sending it back to the factory.

  • Page 21: Chapter 3: Electrical

    If disabled, no checking is performed. If checking is enabled and the motor The LT360 is shipped with an IEC-US power cord. If your power plug does not end its operation in the home position, an error message is shown requirements are different, you can obtain a different IEC cord as needed on the front panel display.

  • Page 22: Control Methods

    User Manual 3.2 Control Methods ■ Acceleration Function The LT360 is truely a universal turntable offering six different methods of This group box selects the Acceleration Function used by the control for every possible application: LT360. Controlled acceleration/deceleration is an important ■...

  • Page 23: Computer Interfaces

    Straight-Through cable (DB-9F) ■ Baud Rate 9600 (factory default) If an LT360 unit is found on the port, the link will be activated and the ■ Data Bits contents read from the LT360 into the parameter fields and controls. If the ■...

  • Page 24: Pulse Input

    The width of the pulse should be at least 10uSec, and the triggering can be tabs will load the parameters set on the rising or falling edge. Any pulses which occur while the LT360 is of that unit into the controls moving will be ignored.

  • Page 25: Analog Input

    BNC connector, the actually circuitry is differential. This helps to reject ground noise. The input source must be very stable and of low noise. The LT360 has a resolution of 0.1 degrees and therefore responds to changes of 1mV at the analog input.

  • Page 26: Analog Output

    LT360 is indicated. There are two polarity modes for this output: Unipolar and Bipolar. When set to UNIPOLAR, the LT360 will produce voltages in the range of 0.000 to +3.600 volts. All position values are positive. When set to BIPOLAR, the Error - 12: Switch Controller Address Failure range will be 0.000 to ±1.800 volts.

  • Page 27: Lr360 Remote

    LT360 turntable manually from a remote does not arrive within 10 seconds, something is wrong. The LT360 uses this location. It provides a duplication of the front...
  • Page 28 This error indicates that the LT360 received some characters, but never received a termination character [Null(0) or CR(13)] before the 10 second timeout expired. When the first character is sent to the LT360, a timer is started. If a termination character is not received within 10 seconds, then this error is produced and the command buffer is cleared.

  • Page 29: Chapter 4: Mechanical

    LT360. Make sure that the computer serial port setup is 9600 baud, 8 data bits, no parity, and 1 stop bit. If the LT360 baud rate has The load capability for the two castings depends greatly on how evenly the been changed, then the PC must be set the same.

  • Page 30: Drive System Lubrication

    LT360. Make sure that the computer serial port setup is lubrication will likely be 9600 baud, 8 data bits, no parity, and 1 stop bit. If the LT360 baud rate has unnecessary. been changed, then the PC must be set the same.
  • Page 31 If this error is shown repeatedly, either there is a noise problem internal in the LT360 or the torque load is too great for the drive system. LT360 Precision Turntable LT360 Precision Turntable...
  • Page 32 User Manual User Manual 7.1 Error Messages The LT360 can display a variety of error codes on the front panel display. The error message will be displayed over a 4 second interval with a format such as Err0 or Er13.

  • Page 33: Chapter 5: Front Panel

    Note that the mass load capability in the vertical configuration is not a The front panel contains all of the connectors for the various interfaces function of the RPM or acceleration functions of the LT360. Gravity domi- including: USB (Type-B), RS-232 (DB-9F), TTL Pulse Input (BNC), Analog nates the acceleration entirely.
  • Page 34 INPUT INPUT OUTPUT INTERFACE INTERFACE gravity will add or subtract from the rotational acceleration of the LT360. From the graphs on the previous pages we find that the average accelera- TTL PULSE 10mV/DEG 10mV/DEG tion for the Flat function is about 0.21M/S at 1 RPM and 1 Meter, assuming ■...
  • Page 35 Note: This input must be disabled if not in use, otherwise it will override all other control methods. The scale factor is 10mV/deg, and the resolution of the LT360 is 0.1 degree. Therefore, the step size and/or resolution of the analog voltage should be at least 1mV.
  • Page 36 This BNC connector provides a means to obtain an analog control voltage M=T/(R•A) = 49/(1.0•0.21) = 233kg = 513 lbs from the LT360 at all times. This can be useful if driving some other display, chart recorder, or other plotting device.
  • Page 37 ■ LED Display The case of horizontal torque is shown in the pictorials below. In this case the LT360 is located on a horizontal surface and the load is rotated in a The four digit LED display is used primarily to give horizontal plane with no change in the vertical axis.
  • Page 38 Remote Control Module (shown below). The LR360 provides a means to locate the control switches and display farther away from the LT360 turntable. This can be useful if the readouts on the front of the unit are not visible or another means of backup control is desired.
  • Page 39 Note: To abort / stop a rotation, press either Red swtich. These switches are also used with other switches to increment/decrement parameter values. 0 Sec 100m 110m 120m 130m 140m 150m 160m LT360 Precision Turntable LT360 Precision Turntable...
  • Page 40 Step buttons. Holding the Step buttons will produce auto repeat. The minimum step size is 0.1 degrees. 0 Sec 25m 100m 125m 150m 175m 200m 225m 250m 275m 300m 325m 350m 375m 400m 425m 450m 475m 500m LT360 Precision Turntable LT360 Precision Turntable...
  • Page 41 16 point family is used. The average acceleration for the Flat profile is 6.7M/S². Note that the controlled acceleration or deceleration phase takes The SmartTorque feature of the LT360 automatically reduces motor power about 15.5mSec to complete. The value of the Impulse step function is when the platter is not in motion.
  • Page 42 Since the rotational travel for a particular movement may currently in use. This will be displayed as: Acc0, Acc1, Acc2, Acc3, or Acc4. be different, the LT360 utilizes three different families of acceleration functions for various step size minimums of: 3.2 degrees, 1.0 degrees, and The Acceleration Function can then be changed up/dn by pressing the 0.1 degrees.

  • Page 43: Chapter 6: Acceleration

    6.1 Acceleration Functions Each of the acceleration functions has an associated velocity profile. The LT360 provides several different acceleration functions or These are shown in the graph below. The Impulse function reaches profiles that control how the platter accelerates and decelerates full velocity very quickly, much faster than any of the other func- from a stationary position to the constant velocity rotation.

  • Page 44: Lt360 Precision Turntable

    If there is additional rigging and/or a fixture attached to the LT360, the rigidity and mass of the additional hardware will play an important factor in 2 - Ramp the overall motional system response.

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