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DrawWorks encoders with up to 2"
shafts or 2" threaded shafts
 
The Series NAMFPX encoder has
been used for many years in Oil and Gas drilling applications
from Sakhalin Island in far eastern Siberia to the Tropics of
Africa to the arctic wasteland of the Canadian Territories.
These encoders are made from hard anodized aluminium and comply
with all the latest ATEX, IECEx and UL certifications. The certificate,
part number, serial number and other pertinent information is
engraved on a stainless steel plate which is screwed and locked
on to the encoder. Shafts are made of stainless steel and
can be up to 50mm or up to 2" size thread. The encoder
comes in many versions, namely incremental, absolute and
tachometer. The incremental can be the Namur approved DIN
circuit or voltage incremental. The absolute is an 8 bit
encoder with a 4...20 mA ramp output every 360 degrees.
The tachometer can measure speeds up to 3000 rpm with a 4...20
mA ramp output.
Another option is to duplicate
the output signal, this way you have two A channels and two B
channels, for redundancy purposes. This adds a
considerable amount of safety to they system, and ensures the
continued operations of the drilling rig for extended periods of
time in case something does occur.
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