LinearX LT360 - Get Motor Home Check

65
LT360 Precision Turntable
DLL Programming Manual
2.46 Get Motor Home Check
■ Class Get (in)
■ Identifier lt_GetMotorHomeChk
■ Hex Value 0xC1
■ Call LT360LIB_CmdValue(Handle, lt_GetMotorHomeChk, RtnStr);
■ Returns 'OFF' or 'ON'
Description
This command returns the status for checking stepper motor synchroniza-
tion. The returned string value is either OFF or ON.
When MotorHomeChk is set ON, the firmware checks that the motor
returns to its home position after each movement. If disabled, no checking
is performed. If checking is enabled and the motor does not end its opera-
tion in the Home position, an error message is shown on the front panel
display.
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.
In normal operation this error should never occur. If it does, the unit must
be powered off to clear the error, or this feature disabled. 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.