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| + Engineering Support! Our engineering expertise is available to provide technical support for the products we sell; and assist our customers in solving their engineering problems. |
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The
Fundamental Operation of SEL Series Rack & Pinion Linear Encoder or
Resolver Measuring Systems |
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Page
1 Rack and Pinion Mesh Geometry Page 2 Long Life & Trouble-free Operation Page 3 Precision, Fine Resolution & Unlimited Length of Travel Page 4 Page 5 Page 6 Page 7 Page 8
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The Fundamental Operation... |
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 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.
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 flex-plate 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.
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.
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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