LinearX LT360 User Manual Download

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LT360 Precision Turntable

User Manual

LT360 Precision Turntable

User Manual

Precision Turntable

User Manual

TEL: (503) 612-9565 • FAX: (503) 612-9344 • www.linearx.com • [email protected]

LinearX Systems Inc • 9500 SW Tualatin-Sherwood Rd. • Tualatin, OR 97062-8586 USA

All specifications subject to change without notice.
© 2006 All Rights Reserved.
Printed in the U.S.A.
March-30-2006

Precision Turntable

User Manual

PN: 910-0019

Computer Aided Engineering & Measurement Systems

Summary of Contents for LT360

Page 1: ...FAX 503 612 9344 www linearx com sales linearx com LinearX Systems Inc 9500 SW Tualatin Sherwood Rd Tualatin OR 97062 8586 USA All specifications subject to change without notice 2006 All Rights Reser...

Page 2: ...ed 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 MathType 4 0 for mathematics typogr...

Page 3: ...or archival purposes You must reproduce and include the copyright notice and label any backup copy You may not a distribute copies of the program or the documentation to others b lease rent grant subl...

Page 4: ...you should recognize that all complex software systems and their documentation contain errors and omissions LinearX its distributors and dealers shall not be responsible under any circumstances for p...

Page 5: ...communicating via an electronic means such as Email or uploading files directly to our web site 2 If the issue regards error messages from the program please include an exact descrip tion of the erro...

Page 6: ...versible Worm Drive Scale Accurate Screen Printed 1 Degree Chassis 16ga Steel Drive System Motor NEMA 23 Stepper Motor Controller Bipolar Microstepping Microprocessor Direction Either Counterclockwise...

Page 7: ...p 13 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 3 1 AC Power 21 3 2 Control Methods 22 3 3 Computer Interfaces 23 3 4 Pulse Input 24 3 5...

Page 8: ...tion 30 5 1 Front Panel Functions 33 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...

Page 9: ...g Input Pulse Input Direction Trigger 72 8 9 CPU LDR USB Firmware LT360LIB DLL 73 8 10 Action Buttons 74 8 11 Position Graphic Readouts 75 8 12 Calibration Button 76 8 13 Update Button 77 8 14 Test Bu...

Page 10: ...ction will update the firmware for the main 32 bit CPU in the LT360 The Flash memory will be reprogrammed Firmware updates are provided as Hex files with a name such as Vader_200 hex If you are provid...

Page 11: ...objects are a safe distance away from the area where the turntable is operating 78 Calibration Clicking this button will open the Calibration dialog as shown below Calibration is performed originally...

Page 12: ...of the position When the LT360 is rotating both displays will be updated several times per second However these two graphics also have active control functions Click on the Platter When the platter is...

Page 13: ...Action This group box contains a number of buttons to control the platter position The Step CW and Step CCW buttons will cause the platter to rotate one step either ClockWise or Counter ClockWise The...

Page 14: ...e fields LDR Firmware This group box displays the version code and identifier of the Boot Loader firmware in the 32bit CPU It is the silicon revision level of the CPU USB Firmware This group box displ...

Page 15: ...w you to bolt the base of the LT360 directly to your fixture without the rubber pads between the inter face This will make the joint more rigid If you will be using the LT360 on the floor then the rub...

Page 16: ...utput Mode This selection controls the operating mode for the Analog Output When Continuous is selected the Analog Output will continuously follow the platter position as it is moving This is a real t...

Page 17: ...is disabled it will ignore that input If you are not using the analog input this input must be disbaled Otherwise the LT360 will be controlled by any noise received at the input Pulse Input This selec...

Page 18: ...All position values are positive When it is set to BIPOLAR the range will be 0 to 180 degrees Both positive and negative values will be shown Analog Output Polarity This selection controls how the LT3...

Page 19: ...rque This is the stepper motor torque for the platter rotation The value is set in percent of maximum torque The allowable range for the parameter is 10 0 to 100 0 For most typical applications your w...

Page 20: ...ation requiring periodic recalibration for NIST compliance the unit can be recalibrated by sending it back to the factory Name This is an arbitrary name which the user can assign to a particular LT360...

Page 21: ...turns to its home position after each movement If disabled no checking is performed If checking is enabled and the motor does not end its operation in the home position an error message is shown on th...

Page 22: ...cceleration deceleration is an important feature that permits heavy loads to be rotated and with minimal shock and disturbance For typical applications the 1 Flat function provides excellent performan...

Page 23: ...serial port on the computer The Link group box has selections for USB NONE COM1 COM2 etc If the NONE selection is chosen the link will be closed To open a link select the USB or one of the COM ports...

Page 24: ...e ignored If you are not using the TTL pulse input it is probably best to keep this feature disabled to prevent false triggering due to any noise pickup at the open connector 65 8 1 LT360 Windows Soft...

Page 25: ...unipolar 0 3 600V or bipolar 0 1 800V The input impedance of the analog input is 1M Ohm Although the input is an unbalanced BNC connector the actually circuitry is differential This helps to reject g...

Page 26: ...lution of the LT360 is 0 1 degree the equiva lent resolution in the output is 1mV The input impedance of the other device should be at least 100K Ohm to prevent loading errors 63 Error 11 Display Cont...

Page 27: ...standard PS2 cable Mini DIN6 The LR360 remote must be con nected to the LT360 turntable before the power is turned on When power is applied the LT360 searches for the presence of the LR360 If found it...

Page 28: ...ght or wrong places can make a difference Error 8 USB Unknown Command This error indicates that the LT360 did not understand the command index sent via USB This error is very uncommon It probably indi...

Page 29: ...differences in the communication parameters between the computer and the 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 ha...

Page 30: ...data bits no parity and 1 stop bit If the LT360 baud rate has been changed then the PC must be set the same Error 2 RS232 PE Parity Error This error indicates problems with the serial port communicati...

Page 31: ...9600 baud 8 data bits no parity 1 stop bit and no flow control Error 0 Motor Home Position Error The stepper motor produces a specific number steps for a given amount of platter rotation The LT360 ut...

Page 32: ...ollowing list describes some of the error codes which can appear Show Error Display Codes 0 Motor Home Position Error 1 RS232 OE Overrun Error 2 RS232 PE Parity Error 3 RS232 FE Framing Error 4 RS232...

Page 33: ...not able to be described on the front panel surface and will be detailed here in the following pages STEP CW STEP CCW ZERO CW ZERO CCW SET DPS RESOLUTION DEG STEP 10mV DEG SET RPM SET ORIGIN SET TORQ...

Page 34: ...ere force is is the product of mass and acceleration F M A T R F R M A M T R A Since the vertical position is changing gravity is a factor Depending on the position of the load or the rotational direc...

Page 35: ...abled or disabled either by using the Win32 application program or through USB or RS 232 commands Note This input must be disabled if not in use otherwise it will override all other control methods Th...

Page 36: ...software or by commands with different operating modes The Analog Output voltage is extremely precise and highly stable over the entire temperature range of 0C to 40C 53 For a Standard LT360 model the...

Page 37: ...the display will show either Position Degrees Step Size DegPerStep Velocity RPM Torque or the Acceleration Function The following pages covering the switch func tions will describe these operations in...

Page 38: ...ed the LT360 searches for the presence of the LR360 If found its display controller will be initialized for use rather than the front panel controls of the LT360 Otherwise the LT360 controls are used...

Page 39: ...meter values STEP CW STEP CCW ZERO CW ZERO CCW SET DPS RESOLUTION DEG STEP SET RPM SET ORIGIN SET TORQUE VELOCITY REV MIN ZERO DEG REFERENCE MOTOR POWER 50 0 Sec 10m 20m 30m 40m 50m 60m 70m 80m 90m 10...

Page 40: ...position will be retained when this switch is released Set Step Size DPS Blue SW This switch is used to change the step size When this switch is pressed the display will show the current step size The...

Page 41: ...is rotating will abort stop the rotation 48 The following graphs show the actual acceleration and velocity profiles for 1 RPM and with a radial distance 1 Meter from center If the rotational travel is...

Page 42: ...nal travel for a particular movement may be different the LT360 utilizes three different families of acceleration functions for various step size minimums of 3 2 degrees 1 0 degrees and 0 1 degrees De...

Page 43: ...SIN2 4 SIN3 LT360 ACCELERATION PROFILES ACCELERATION CONSTANT VELOCITY DECELERATION 1 FLAT 2 R A M P 3 SIN2 4 SIN3 NOTE HEIGHT OF IMPULSE IS 10X FLAT 0 IMPULSE 46 LT360 VELOCITY PROFILES ACCELERATION...

Page 44: ...s based on a parabolic velocity function 45 3 SIN2 The Sin2 function provides a more gradual acceleration profile beginning at zero increasing to a maximum then decreasing to zero again as the constan...

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