Timed Vector And Arc Commands - Scanlab RTC 5 PC Interface Board Installation And Operation Manual

8.10 Timed Vector and Arc
Commands
The normal vector commands (jump and mark
commands) and arc commands are processed by the
®
RTC 5 in such a way that the laser focus moves along
the surface of the image field with a defined speed,
the jump_speed or the mark_speed. This is fine for
most laser marking and laser material processing
applications.
However, some applications require that each vector
or arc command consumes exactly the same amount
of time, regardless of its spacial length. In this case,
it is practical to specify the duration of the jump or
mark process, rather than the jump or mark speed.
The commands
• timed_jump_abs
• timed_jump_rel
• timed_mark_abs
• timed_mark_rel
• timed_arc_abs
• timed_arc_rel
allow specification of the duration of the vector or arc
command with an accuracy of 10 µs (the output
period of the microvectors) and in the range from
10 µs to 167772160 µs ( 2.8 min).
The jump or mark vector or the arc (but not ellipses)
will be split up into a number of microsteps that
correspond exactly to the specified time. (Also see the
section "Microsteps" on page
means that the jump or mark speed, i.e. the velocity
of the laser focus (and the angular velocity of the
movement of the mirrors) will depend on the length
of the vector or arc.
®
RTC 5 PC Interface Board
Rev. 1.9 e
8 Advanced Functions for Scan Head and Laser Control
96.) Of course, this
Notes
• After a timed vector or arc command, a
jump delay, a mark delay or a polygon delay
is inserted, just like after a vector or arc
command. That means the total time for the
command is the sum of the specified time and the
corresponding delay.
(Also see the section "Scanner Delays", page
• If the vector-defined laser control is activated,
also timed para commands can be used (timed
para arc commands are not provided):
– timed_para_jump_abs
– timed_para_jump_rel
– timed_para_mark_abs
– timed_para_mark_rel
• If the 3D option is enabled, also timed 3D vector
commands can be executed (timed 3D arc
commands are not provided):
– timed_jump_abs_3d
– timed_jump_rel_3d
– timed_mark_abs_3d
– timed_mark_rel_3d.
If additionally the vector-defined laser control is
activated, also timed 3D para commands can be
used:
– timed_para_jump_abs_3d
– timed_para_jump_rel_3d
– timed_para_mark_abs_3d
– timed_para_mark_rel_3d
• As of RTC5OUT.out version 526, even the
execution times of timed marking commands
(but not timed jump commands) with zero
spacial length will achieve the specified value (if
the specified time > 5 µs) and these marking
commands will also behave like timed marking
commands of finite spacial length with respect to
laser control signals and mark/polygon delays
(also see page 102). This lets you easily
synchronize Processing-on-the-fly application
timing even where Processing-on-the-fly
compensation – from, for example, robot arm
motion – has already been calculated into the
marking coordinates. Another use is for
separately marking "points" within a polyline.
100.)
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