Scanlab RTC6 PCIe Board - Variable Polygon Delays

RTC6 boards
Doc. Rev. 1.0.21 en-US
7 Basic Functions for Scan Head Control and Laser Control
151
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Variable Polygon Delays
By setting the VarPoly value > 0 (at set_delay_mode
or set_delay_mode_list) it is enabled:
• “Variable Polygon Delays” mode
Then, the RTC6 PCIe Board calculates the “Variable
Polygon Delay“ v_delay() for every Polyline corner
according to:
v_delay() = scale() × polygon_delay
For the definition of the angle  using the example of
mark vectors, see Figure 39.
For circular arcs and ellipses, analogously the
tangents at the connection point are relevant.
scale() is a scaling function for the Polygon value
from set_scanner_delays (constraint
0  scale()  2), see Figure 40. The default scaling
function after load_program_file is
scale() = 1 – cos(). It can be replaced by a
user-defined scaling function, see Section ”User-
defined “Variable Polygon Delays””, page 153.
39
Variable Polygon Delays. Definition of the angle .
ϕ
2
Mark
Mark
ϕ
1
Mark
Angles  between the
vectors of a Polyline
40
Variable Polygon Delays. Variation of the Polygon Delay (default scaling function after load_program_file).
1 – cos (ϕ)
ϕ
180°
90°0°
0
1
2
scale (ϕ)
EdgeLevel
Polygon Delay =
scale() × Polygon value
from set_scanner_delays.
Maximum