 Years
of Trouble Free Operation
A rack and pinion style
incremental linear encoder or resolver combined with a ruggedly
constructed DRO, NC, CNC or PLC provides the user with years of
trouble-free operation.
Tolerates
Coolant and Metal Chips
A rack and pinion style encoder
or resolver is the most reliable feedback device for operation in an
environment where coolant and metal chips are ever present. One
advantage of the SEL Series linear encoder or resolver package is that
coolant does not affect either the rack or the pinion. By comparison, a
glass scale will either fail or require ongoing cleaning and maintenance
after coolant seeps through the encoder seals.
The SEL Series features a unique
dual lip seal to inhibit the flow of metal chips into the rack and
pinion area. When a metal chip penetrates the single seal on a glass or
magnetic scale, it will often render the feedback device inoperable
causing a need for system repair and most likely replacement. If a metal
chip does enter the SEL Series enclosure, a flexplate simply flexes and
allows the pinion to ride over the metal chip without damage to the
encoder or error in the readout at final position.
Long
Life in Hostile Environment
It is well accepted that the rack
and pinion linear systems have a high degree of dependability and life
while operating in the rugged environment of the machine tool. We have
not had a rack wear out in over 20 years of providing crowned, ground
racks for precision position feedback.
Maintenance
Free Operation
The SEL Series Rack and Pinion
Systems are rarely affected by the environment and tolerate metal chips
and coolant. Under normal operating conditions, the rack and pinion
system will not require maintenance over the life of the unit.
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