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Rack and pinion incremental linear encoder
Encoder Products Company

Backlash B-Gone! At last, a linear encoder solution with no back-lash or slippage. The NEW TR2 Tru-Trac™ is a versatile solution for tracking velocity, position, or distance in almost any application, featuring an integrated encoder with a rack and pinion gear assembly. Using the Rack and Pinion gear system, encoder readings can be obtained with repeatable positioning, providing excellent accuracy. Racks can be ordered in varying lengths, and with the accessory spacer block, multiple lengths of rack can be joined for easy installation (see TB-522 for details).
Due to the spring loaded torsion arm, which provides simple to adjust torsion load, the TR2 has all the flexibility and maneuverability of the original TR1 Tru-Trac™. It has the ability to be installed in a horizontal, vertical, or upside down position. The threaded shaft on the pivot axis is field reversible, providing mounting access from either side, and the durable conductive composite housing material will eliminate static build up. With so many configuration options in a simple integrated encoder solution, it is easy to see that the TR2 is on the right Track for success!