RCK_DriftCompensation (FB)

FUNCTION_BLOCK RCK_DriftCompensation

This function block is implemented to compensate the cutter drift which the cutter leaves it original position during the rotary cutter system runs for a long time that means the cutter axis stops at home position, but the cutter is not at the position where the homing sensor is. Usually, this is caused by the lost of precision from floating-point calculation or the relative slide between the cutter and the motor shaft.

An external function block or program should be used to capture the position of cutter axis when the cutter crosses the homing senor. The capture done signal and the detected cutter axis position need to be connected to the inputs SwitchDetected and DetectedPositon.

This function block can only be activated when cutter state is in “Automatic”.

Input AccLimit is used to define the percentage during the compensation which acceleration and deceleration work.

Note

The unit of MaxDeviation, MaxCompensation, DetectedPosition of cutter axis must be degree as the same in cutter axis setting page.

InOut:

Scope	Name	Type	Initial	Comment
Input	Enable	BOOL	FALSE	Enable the function block with Enable = TRUE
	MaxDeviation	LREAL	10.0	[Degree] specified maximum allowed deviation. Range: > 0 and <= 180/NumberOfCutter
	MaxDeviationCountValue	INT	10	Specified maximum allowed times which the detected deviation continuously exceeds MaxDeviation. Range: >=0 and <= 100
	MaxCompensation	LREAL	10.0	[Degree] Specified maximum amount of single compensation allowed. Range: >0 and <= MaxDeviation
	AccLimit	LREAL	50.0	[Percentage] Defines the percentage during the compensation which acceleration and deceleration work. Range: >= 0 and <= 100
	SwitchDetected	BOOL	FALSE	The signal from external to indicate that a new position is deteced
	DetectedPosition	LREAL	0.0	[Degree] the detected cutter axis position
Output	Done	BOOL		Shows the status of the command. Done = TRUE if the execution is finished
	Busy	BOOL		Indicates that the function block is not finished
	Active	BOOL		Indicates that drift compensation is working
	Error	BOOL		Signals that error has occurred within function block
	ErrorID	AC500_MotionControl.ERROR_ID		Error identification. For error details refer to Enumeration AC500_MotionControl.ERROR_ID
	AppErrorID	ERROR_ID		Error identification. For error details refer to Enumeration ERROR_ID
	CurrentDeviation	LREAL		the current detected deviation
	MaxDeviationCounter	INT		the counter of how many times which the detected deviation continuously exceeds MaxDeviation, reset to zero automatically if the detected deviation is less than MaxDeviation
Inout	RotaryCutter	RCK_RotaryCutter		Reference to rotary cutter