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Laser Beam / Nonconventional
Machining Auditor Opportunity
Overview: As an independent contractor, you will conduct
nonconventional machining audits. If you are someone who
likes to travel, has experience and/or qualifcations in manufac-
turing/engineering, and is looking for a new challenge.
Qualifcations: Te ideal candidate will possess:
• BS degree in Metallurgy, Materials Science, Chemistry or
• Minimum two ( 2) years of “hands on” experience (preferably
in the Aerospace Industry) with one or more of the f
ollowing non-conventional machining processes: Laser
Beam Machining (LBM), Electrochemical Machining
(ECM), Electrochemical Grinding (ECG), Electrochemical
Drilling, Electrical Discharge Machining (EDM) or Abrasive
Water Jet Machining (AWJM)
• Field auditing experience (Aerospace Industry Preferred)
• Understanding of SAE, AMS and Prime Contractor
non-conventional machining specifcations as well as General Quality Systems requirements (AS9100)
Independent Contractor Auditors enjoy: A fexible schedule,
the ability to work from any location in the world, an opportunity to participate in infuential industry program.
Apply for this opportunity online at:
For more information on Performance Review Institute and the Nadcap Program please visit
our website at
24 Industrial Laser Solutions MAY/JUNE 2017
machining processes are executed, the
material removal rate is material dependent.
A study [ 2] shows that material removal
rate for stainless steel increases as pulse
width decreases from 10ps to 900fs,
whereas the removal rate for aluminum
nitride decreases as pulse width decreases.
In machining heat-sensitive polymers, such
as poly-L-lactic acid (PLLA) used to manufacture biodegradable stents or thin films in
organic LED (OLED) displays, femtosecond
laser pulses are required to avoid melting
and heat damage.
FIGURE 3a shows melting at the edge of
PLLA using a 10ps laser, while FIGURE 3b
shows a clean edge achieved using a 400fs
Spectra-Physics Spirit laser. So, femto-
second lasers are necessary for machining certain type of materials because of
their properties and in situations where the
required process quality requirements can-
not be met using picosecond lasers. As
with nanosecond and picosecond lasers,
femtosecond lasers are also improving in
cost-performance over time.
While no one single laser pulse width can
achieve the desired machining for all materials, the choice of pulse width does have
high impact on quality, throughput, and
cost of the processes. A laser should be
chosen based on the material to be processed and the desired quality, throughput, and cost requirements. In general,
nanosecond lasers provide an economical,
higher-throughput solution at a reasonable
quality over picosecond and femtosecond
lasers, and UV nanosecond lasers (in particular) offer a “sweet spot” of high quality
and high throughput for many applications.
However, for thin metals, transparent
materials, and heat-sensitive materials, pico-
second and femtosecond lasers can pro-
vide machining quality advantages and, if the
best machining quality is necessary, a picosecond or femtosecond laser are favored for
micromachining. A new class of high-power
industrial picosecond and femtosecond
lasers are providing higher throughput, along
with higher quality at lower cost per watt.
Looking into the future, we see continued advances in the cost-performance of
nanosecond, picosecond, and femtosecond lasers. These advances will drive fur-
ther rapid adoption of lasers in precision
manufacturing using all three categories
of pulse widths, each for its particular set
of materials and applications with its own
advantages in machining quality, throughput, and economics. ✺
Explorer, Quasar, Spectra-Physics, Spirit,
and Talon are registered trademarks of
Spectra-Physics, while IceFyre is a trademark of Spectra-Physics.
[ 1] B. N. Chichkov et al., Appl. Phys. A, 63, 109–115 (1996).
[ 2] “Same quality at a third of the machining time,”
Commun.: Laser Technik J., 12, 22–26 (Jun. 11, 2015).
RAJESH PATEL ( email@example.com),
JIM BOVATSEK, and HERMAN CHUI are all with Spectra-Physics, Santa Clara, CA; www.spectra-physics.com.