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The
Process Control Shutter is used at frequent
intervals, allowing equipment to move or change in
between optical exposures. An example would be laser
cutting. At various points, the shutter would block
the laser to allow table repositioning and cutting to
resume.
All Safety
Interlock and Process Control Shutters are failsafe
and close upon power loss. They are not dependent on
gravity to close.
Switching
speed requirements for safety and process applications
are moderate. The flexure technology used in these
products offer inherent fast switching without
developing large heat loads in the electromagnet.
Many of
these applications can use low power, simple
electronic drive systems. See our
Application Notes page for more on OEM and
user built drive circuits. Our
Shutter Controllers product
line offers the most convenient way to drive the
shutter and extract all benefits of the shutter
design.
Position
sensors are on most of the models, providing a safety
or process circuit with verification that the shutter
did indeed open or close as it was instructed to do
from the power circuit.
These
position sensors are completely independent of the
power circuit. They audit the physical movement of the
flexure blade, with either solid-state opto-interrupters
for smaller apertures, or mechanical micro-switches
for larger apertures.
The
solid-state sensors are powered from regulated 5 VDC
at about 20 mA current budget. There are two output
leads which yield a logic hi or lo depending on
shutter state.
Our CX2450B
controller series provide the 5 V and offer the output
conveniently on a terminal strip at the rear of the
controller.
The output
signals are logic ready TTL totem pole outputs, able
to drive up to about 5 mA. This signal can be used to
control software or to drive power electronics for
warning light illumination.
The
mechanical micro-switches provide contact closure for
the open and closed states. There are two leads for
each switch. Typically switches are operated at 5, 12,
24 VDC at a few tens of mA, but are rated for use at
several Amps. Contact resistance is less than 5 ohms
with cable loss included.
Many of
these models are driven with user-built circuitry.
Switching speed is very dependent on the circuit, with
more advanced circuits providing faster speeds. In
general, all models close in less than 50 msec, with
an approximate rule of 4 msec per mm of aperture
diameter.
Speeds
shown below represent switching using our recommended
CX2450B controller.
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MODEL |
FEATURES |
APPLICATIONS |
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*
Fits Standard 1.75"
HENE Laser Tubes
*
4 mm Aperture
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Simple 12 V Drive
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Low Cost
*
10 Hz Cycling
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No Position Sensors |
*
Safety Interlock
*
Strobe
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Entertainment Lighting
*
Exposures
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*
Small Package
*
Simple 12 V Drive
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Up to 500m W Optical
*
Thru-hole and Side Mounting
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2.5 mm Aperture
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Up to 5 Hz Cycling
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No Position Sensors |
*
OEM Safety
*
Instruments
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*
Fast Switching for Processing
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2.3 mm Aperture
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Smallest Package
*
No Position Sensors
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*
OEM Requiring Speed
and Low Cost
*
Fits in Tight Zones
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Highest Reliability
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Biotech Exposures
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*
4 mm Aperture
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Smallest Package
with Logic Sensors
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Cycling up to 5 Hz
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Standard Gold Optic,
Custom Optics Available
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Typical 10 ms Switching
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Up to 25 W Optical |
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OEM Safety Interlock
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High Rep Rate DPSS
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Thin Working Zones
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*
Efficient 24 V Drive
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6.3 mm Aperture
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Lowest Outgassing
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10 W Optical
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10 msec Switching
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Teflon Cable
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Larger Beam Formats
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UV Sources
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Exposure Processing
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8 mm Aperture
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Up to 25 W
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Broadband Optic
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Cycling to 3 Hz
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20 ms Switching
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Logic Sensors
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Safety Interlock
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Slow Processing
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Diverging Beams
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Tight Zones
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OEM Integration
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8 mm Aperture
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Grazing Incidence
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Up to 1 J/cm2
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Up to 200W Optical
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Processing to 10 Hz
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Multiple Optic Options
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Logic or Mechanical
Position Sensors |
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High Power Interlock
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Q-Switched Lasers
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Fast Processing
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OEM Integration
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X-Ray Beams
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12 mm Aperture
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Up to 5 Hz Cycling
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All Other Features and
Options Same as LS055W8
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*
Same as LS055W8
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* 14 mm Aperture
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Dielectric Optics
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Up to 5J/cm2
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Mechanical Switches
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Optics Options
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2 Hz Cycling
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Chiller Plate Option
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1.0 Inch Thick |
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High Energy Pulses
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Interlock
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Thin Zones
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Multi-line Lasers
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*
20 mm Aperture
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1.5 Inch Thick
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1/4" Slot Mounting
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*
Same As LSTXYW8
with Larger Beams
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