Scanlab RTC 4 - Using Two Correction Files

RTC
®
4 PC Interface Board
Rev. 1.3 e
5 Advanced Programming
42
innovators for industry
5.3 Using Two Different Correction Files
Double Scan Head Configuration
The RTC
®
4 (2D version) can store two different
correction files at the same time. For two scan heads
controlled from a single RTC
®
4 board, each scan
head can thereby receive its own separate image field
correction.
Each of the two correction files can be assigned to
either of the two scan head control ports by the
command select_cor_table.
See page 54 for details about the two scan head
control ports of the RTC
®
4.
The following steps describe how to use two
correction files in a double scan head configuration:
 Load the first correction file by the command
load_correction_file(FileName1, 1, ...) .
 Load the second correction file by the command
load_correction_file(FileName2, 2, ...) .
Specify additional gain, rotation and offset
to align the two image fields precisely with
respect to each other. Please refer to the
command load_correction_file (page 95)
for details.
 Afterwards, you have to assign the first correction
file to the first scan head and the second
correction file to the second scan head by calling
the command
select_cor_table(1,2) .
Using Two Correction Files In A
Single Scan Head System
It can also be useful to work with two different
correction files in a single scan head system, for
example if a pointer laser and a main laser with a
different wavelength are used.
 Load the two correction files as described in the
section "Double Scan Head Configuration", left.
 Afterwards, use the commands
select_cor_table(1,0) and
select_cor_table(2,0)
to switch from one file to the other.
Note: The RTC
®
4 3D version can store only one
correction file.
Notes
• The default setting for select_cor_table is
(1,0) , i.e. correction table #1 is used for the
first scan head. The output signals for the
second scan head are turned off.
•The RTC
®
4 returns to this setting after
every reset (by one of the commands
load_program_file or dsp_start).
If a different setting is to be used, the command
select_cor_table must be called again after the
reset.