12
LT360 Precision Turntable
DLL Programming Manual
Error - 0 : Motor Home Position Error
The stepper motor produces a specific number steps for a given amount
of platter rotation. The LT360 utilizes microstepping for additional
precision control. One particular phase of the motor is designated as
the Home position. For any given platter rotation, the motor should
always end in its Home position. This can be checked by the firmware
continuously, if the MotorHomeChk option is enabled. If the motor
position is not in the Home phase at the end of a movement, this error
will be shown.
In normal operation this error should never occur. If it does, the unit
must be powered off, or the MotorHomeChk option disabled, to clear
the error. It is possible for this error to be produced by noise in the
stepper motor controller, or by the load exceeding the torque capability
thereby causing the motor to skip steps.
If this error is shown repeatedly, either there is a problem internal in the
LT360 or the torque load is too great for the drive system.
Error - 1 : RS232-OE Overrun Error
This error indicates problems with the serial port communications. It
can be caused by differences in the communication parameters be-
tween 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 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 communications. It
can be caused by differences in the communication parameters be-
tween the computer and the LT360. Since the LT360 does not use
parity, this error is unlikely. 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 been changed, then the PC must be set the same.
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