Status Signals - Scanlab hurrySCAN 10 Installation & Operation Manual

correction table specific for your system is included in
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the RTC software package or can be ordered from
SCANLAB (also refer to the RTC
use positive and negative coordinate bit-values
( – 32768 to +32767) of an ideal image field, based
on the reference system shown in
origin (zero point) in the center of the image field.
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The RTC board calculates the corresponding input
values and transfers them to the scan head.
The image field size, as well as the working distance A
between the input laser beam and the nominal
working plane, depend on various factors – among
them the focal length of the objective and the aper-
ture of the scan head. The divergence of the input
beam also has an influence on the working
distance A.
When used with a collimated input beam, the
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hurrySCAN 10 in combination with the delivered
objective (focal length f = 254 mm) with working
distance A = 390 mm produces a typical usable
square image field of (170 x 170) mm
Calculation of the typical image field size is based on
a scan angle of ±0.349 rad optically. Possible image
field limitations due to vignetting or imaging deficits
are considered (see the section "Customized Optical
Configuration" on page 6). Calibration angles big
enough to produce larger-than-specified image fields
might be possible in some cases. To avoid scan system
damage, make sure the maximum allowed scan angle
is never exceeded.
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hurrySCAN 10, digital, 1064 nm, f = 254 mm
Rev. 2.6 e
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2 The hurrySCAN 10 – Principle of Operation

Status Signals

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The scan head provides three status signals available
manual). You can
via the XY2-100 protocol. If you use a RTC
then these status signals can be evaluated via the
GET_HEAD_STATUS command.
figure 4, with the
• PWROK (i.e. "Power OK")
2
.
• TempOK (i.e. "Temperature OK")
PWROK = 0 signifies a problem in the power
supply or a protective action by the electronics.
Upon power-up, the PWROK signal is initially 0.
After a few seconds (when the electronic compo-
nents have reached a stable operating state) the
PWROK signal then switches to 1. If, upon
powering up, the PWROK signal doesn't switch to
1 within several seconds or if the signal switches
from 1 to 0 during operation, then the laser must
be turned off immediately. Under some circum-
stances the system could deflect the laser beam in
an unintended direction, which may cause health
hazards and severe equipment damage. The
system should be checked immediately to deter-
mine the cause.
Switching of the PWROK status signal from 1 to 0
during operation can be caused, for example, by
a defective power supply (also see
Supply" on page 23).
The PWROK status signal also switches from 1 to
0, if the galvanometer scanner's temperature
exceeds a critical value due to excessive load or
excessive environmental temperature (see
page 11).
The TEMPOK signal always switches from 0 to 1
when the operating temperature has been
reached (which might take a few minutes). If,
during operation, the galvo temperature drops
below its minimum operating temperature or
exceeds a maximum allowable temperature, the
TEMPOK signal will switch to 0. In this case,
system operation does not need to be stopped
immediately, but large drift or other side-effects
may occur.
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board,
section "Power
9