Scanlab RTC 4 Installation And Operation Manual page 48

Timing
Figure 20 shows the pixel output timing diagram.
Each LASERON pulse is preceded by a LaserOn delay.
The ANALOG OUT2 signal is synchronous to the
position update of the scanners. (Please refer to the
section "Laser Control" on page 50
Note: The DA converter requires about 1 µs ... 2 µs to
produce a stable analog output signal.
The pixel step period T is set with the command
set_pixel_line. To avoid laser control faults, make
sure that the following holds true for all pixels:
T > LaserOn Delay + maximum pulse width
Note
The 9-pin D-SUB laser connector of the RTC
provides the signals LASER1 and LASERON or
ANALOG OUT2. If the ANALOG OUT2 signal is to be
used, jumper X7 must be set to position 2-3. See
chapter 8.2 "Changing The Jumper Settings",
page 59.
dx,
dy
Individual
pulses of the
LASER1 signal
(Laser Control
Method C)
LaserOn
Delay
Timing of the scanner positions and the
laser control signals in the pixel output mode.
Also see section "Laser Control", page
®
RTC 4 PC Interface Board
Rev. 1.3 e
5 Advanced Programming
for details.)
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4
Pixel Step Period T
Time
Pulse Width
Time
Time
20
50.
If you need the LASERON signal and the ANALOG OUT2
signal, then you have the possibility (with an RTC
including the Processing-on-the-fly option only) of setting
jumper X7 to position 1-2 and taking the signal
ANALOG OUT2 from pin 14 of the MARKING ON THE FLY
connector.
Laser Parameters
The LaserOn delay must be set to a suitable value.
See the section "Scanner Control" on page
The standby pulses should be turned off in pixel
mode (command set_standby).
Usually each pixel is marked with one pulse. To
accomplish this, the pulse width and output
period of the LASER1 / LASER2 signal should be
set to values larger than the pixel output period T
(command set_laser_timing).
Thus the LASER1 / LASER2 signal will stay active
and the laser is controlled by the LASERON signal
only.
Also see the section "Laser Control" on page
The FirstPulseKiller signal should be set to zero
(YAG modes only).
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4
49.
50.
48