brushless DC motors has been
awarded US Patent No. 6,963,064.
Instead of requiring discrete modules
for individual line-count applications,
this newly patented encoder provides
an unprecedented capability to achieve
multiple line counts utilizing only one
module.
The PITTMAN encoder has been
configured to fit a variety of brush-commutated and brushless DC motor
products available from most manufacturers. Encoders can be added to
any motor or gearmotor with wires or
side-exiting power terminals and can
be plastic-housed or open air. They can
be factory-mounted or prepared
for mounting in the final stages of
end-product assembly.
This encoder features an innovative PC board-based modular design
and multi-tracked code discs to
enable the widest range of resolutions
(192, 200, 250, 256, 360, 400, 500,
and 512 counts per revolution) using
minimal parts. The PC board consists
entirely of surface-mount components, which promotes flexibility in
low tooling costs and quick
turnaround to accommodate custom
control electronics.
The encoder is an incremental,
non-contacting rotary-to-digital
feedback device translating real-time
shaft angle, speed, and direction of
rotation to TTL-compatible outputs.
Outputs are two-channel, in quadrature, with medium resolution
encoding. Signal conditioning options
(all on board) include an RS-422
high-speed differential line driver,
pull-up resistors, and additional
filtering capacitors.
ahead of the July deadline.
“Advanced Circuits is one of a
limited number of PCB manufacturers
in the US offering a complete lead-free
solder alternative,” said Tony Garra-mone, corporate training manager at
Advanced Circuits. “We strive to stay
ahead of the curve and provide our
customers with the most current
technology. Any printed circuit board
that we produce whether prototype or
production is free of mercury,
cadmium, hexavalent chromium,
polybrominated biphenyls, or polybrominated diphenyl ethers.”
Advanced Circuits’ lead-free
boards are produced using a lead-free
alloy of 99.3 percent tin and 0.6
percent copper with a trace of
nickel (SN100CL). This solder offers an
alternative to more expensive lead-free
finishes. NV
ADVANCED CIRCUITS
GOES LEAD-FREE ON
ALL PCB PROTOTYPES
Advanced Circuits, a source for
quick-turn printed circuit boards, has
announced that all prototypes will now
be fabricated using lead-free solder as
a plating finish. The lead-free HAL
finish provides an enhanced solderable
finish for assembly and meets all legislation requirements for the European
Union’s RoHS Directive six months
February 2006 33
