PROGRAMMING18. SPECIFYING THE LASER FUNCTION
Whether to enable or disable the power control function can be set using
the laser setting screen or a parameter.
Setting using the laser setting screen
By setting the power control item on the laser setting screen to 1, the
power control function can be enabled.
Setting using a parameter
By setting bit 0 of parameter No. 15000 to 1, the power control function
can be enabled.
Whether peak power, pulse frequency, or the pulse duty cycle is to be
controlled can be freely determined using parameter No. 15096. Multiple
items can also be selected.
The power control function uses the feedrate of the nozzle to calculate the
value of each laser output element (peak power, pulse frequency, and
pulse duty cycle). To determine the feedrate accurately, the axes of the
machine that are related to the operation of the nozzle are set using
parameter No. 15089.
When this parameter is not set, the specification of the first and second
axes is assumed.
A synchronous axis for simple synchronization control is related to the
operation of the nozzle, but must be excluded from the setting because it
is counted, together with the master axis, as one axis.
Even in the steady state, the feedrate fluctuates very slightly. So, the value
of each data item calculated from the feedrate fluctuates accordingly. To
prevent this fluctuation, an allowable feedrate fluctuation width (dead
zone) can be set using a parameter.
If the feedrate of a block being executed fluctuates within the value set
with a parameter, the specified feedrate is assumed to be satisfied; the
value of each data item is not changed.
The power control function changes the value of each laser output data
item in proportion to the specified feedrate. However, laser output
changes earlier due to a delay in the machine system (servo system), so
that a change in the machine system movement does not match a change
in laser output. To compensate for this mismatch, a primary delay filter
is used for the feedrate data of the machine system. Thus, a change in the
laser output can be delayed accordingly. A primary delay filter is set using
To use the laser power control function in RISC mode, enable power
control mode before entering RISC mode. Similarly, before canceling
power control mode, exit from RISC mode.
When the laser power control function is used, the laser output conditions
to be controlled can be selected by parameters.
The laser power control function cannot be used together with the pulse
enhanced function. In power control mode, the pulse enhanced function
Groups of parameters related to the high–speed high–precision
contouring function based on RISC can be registered.
From the registered groups of parameters, the optimum group of
parameters for a machining state can be selected.
D Enabling/disabling the
D Control item selection
D Axis subject to power
D Dead zone for feedrate
D Machine system delay
D Laser power control
function in RISC mode
D Selection of laser
conditions to be
D Combination with the
pulse enhanced function