Further functions

Influencing the stroke triggering time:

The stroke triggering time can be influenced to achieve a good machining result. Stroke pre-triggering permits compensation of the constant dead time in signal processing. Stroke post-triggering can compensate for the transient response of the axes or, for example, for the hold-down time of pressure pads in punch operations.

Depending on the setting, influencing of the stroke triggering time refers to one of the following events:

• Interpolation target point reached →G00,G01,G02,G03
• In-Pos window of the slowest axes →G60

The dwell time G04 together with an M function is used for stroke post-triggering.

An M function of the MET_SVS type is used for pre-triggering.

Notice

The offset timing resolution depends on the CNC controller cycle time as the smallest unit.

Example

Stroke pre-triggering:

The user-specific M function M97 is to be output to the PLC 40 millimetres before the synchronisation time in the block sequence is reached.

Excerpt from the channel parameter list:

# Definition of M functions and synchronisation types

# ======================================================

m_synch[97] 0x02000000 MET_SVS

# Setting the pre-output time, pre-output path with MET_SVS type

# ===============================================================

m_pre_outp[97] 40000 in us

N10 #STROKE DEF BEGIN

N30 M97

N40 #STROKE DEF END

Example

Stroke post-triggering:

M96 is the user-specific M function for triggering the stroke motion. The stroke motion should only take place 50 milliseconds after the stroke positions are reached.

N10 #STROKE DEF BEGIN

N20 G04 0.05

N30 M96

N40 #STROKE DEF END

Example

Example of output of the M function referred to the In-Pos window:

M96 is the user-specific M function for triggering the stroke motion. The stroke motion should only take place 50 milliseconds after the physical stroke positions of all axes are reached (actual position is in the window).

N10 #STROKE DEF BEGIN

N20 G04 0.05

N30 M96

N40 #STROKE DEF END

G90 G17

N10   X10     Y30

N20 #PUNCH ON [LENGTH 5]

N30   G60 X30    Y30

N40   G60 X30    Y10

N90 #PUNCH OFF