Laser Marking Systems
from Gravograph: Frequently Asked Questions
 Request more information about the Laser Marking Systems
How do I pick the proper power level for my laser marking system?
Choosing the wattage of the laser marking system is an important decision.
Certain applications are very forgiving toward power (i.e. anodized
aluminum or marking wood) while others, like cutting, are much more
power sensitive. The question is not only what your present application
is, but what future applications you might want to undertake. For a
lower volume trophy and awards business, a 30-40 watt laser marking
system would be adequate. If cutting materials is a clear need, you
will need 60 watts of power or more.
It is important to note that the wattage level of your laser marking
system is directly related to processing speed. If budget allows, it
is always better to go a little higher in wattage than your immediate
application needs. In many cases, the machine can be run at a faster
rate if there is extra power available.
What is the right table size for my laser marking system?
Table size is something to consider carefully when evaluating your options
for a laser marking system. If your budget allows, it always better
to go slightly larger in anticipation of future applications. Gravograph-New
Hermes machines are built around standard sheet stock material sizes.
This minimizes waste, if you are a consistent user of standard size
material. Most plaques are designed to 6” increments, to which
our machines are especially well-suited.
What is the largest part I can process on a laser marking system?
At first glance, it may seem this would be limited by the size of your
table. However, there are actually two additional parameters. One is
the height of the part in question and the other is the ability to ramp
up to full power/speed.
Unlike many other manufacturers, Gravograph-New
Hermes table size and part sizes are identical. Gravograph
machines have almost the longest Z-axis stroke in the industry and thus
one machine can process taller parts than most other manufacturers.
Note: Keep your future potential needs in mind. If you’ve ever
intend to process a wine bottle, for instance, you will need about 8”
of Z-axis stroke as the bottle must be tilted to do it effectively.
What materials can I process, and which ones cannot be processed
with a CO2 laser marking system?
The material range is quite broad, from organic materials like
wood, leather, and stone, to glass and crystal. Many man-made materials
like plastics and rubber can also be processed. There is also a wide
variety of painted and coated metals that are CO2 friendly.
Bare metals are not processed easily and often have very poor results
and there is potential to damage the laser optics. When processing bare
metals very high-quality marking can be achieved by using the Cermark
product or other oxidizing agents. As a hard rule, PVC-based plastic
material and magnesium should not be processed due to hazards to the
operator and the machine.
Why is the ventilation important on a laser marking system?
Several materials that are laser-processed emit fumes and odors, some
of which are toxic. This is why we do not recommend processing PVC-based
products under any circumstance. Rubber, acrylic, and many other plastics
are non-toxic, but have offensive odors, that when burned, can adversely
affect the workplace. Most of these are easily controlled via the proper
ventilation system.
Besides the odor issue, some of the particulate generated by the lasing
process can actually cause corrosion on bare metal surfaces within the
enclosure and even some optical components, if not properly vented.
How do I pick the right exhaust system?
There are many options for exhaust systems, including simple devices
like blowers up to more sophisticated, filtered systems. Basically,
the issues to consider are floor space, decibel level, cost, and required
modifications to the facility. In many cases, a blower will work, however
they are very loud and often require that they be “plumbed”
out of the building or into the existing HVAC system. Filtered systems
are quieter and can be placed closer to the laser, but they also have
a consumable cost applied. The filters do have to be replaced periodically.
The Exhaust System Selection Guide
details the options available to help you make the proper decision.
Is the laser engraving machine a safe machine to operate?
All Gravograph lasers have an interlock that keeps the laser
from firing if the door is opened. Our systems have a redundant interlock
tied into a solenoid-controlled safety shutter. This is an extra safety
precaution that we include. In addition, the filter glass in the top
door removes 100% of the potentially harmful radiation caused by the
laser.
Related Links:
Gravograph Laser Engraving
LS100 Laser Engraver
LS100Ex Laser Engraver
LS900 Laser Engraver
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If you would like to learn more about Gravograph, please contact us.
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