February 2012 19 – 277
19 Encoder interface
19.1 Position encoders
19.1.1 Introduction
Position encoders are also referred to as linear encoders or angle encoders.
They report positions and movements of the machine to the control.
The iTNC 530 operates with incremental and absolute encoders.
Permissible encoders:
Encoders with one reference mark
Encoders with distance-coded reference marks
Encoders with EnDat interface 2.1, 2.2
Scales and scale tapes (e.g. LF, LC, LS, LB) are linear position encoders.
Angle encoders (e.g. RCN, RON, ROD, ERP, ERA) are rotational position encoders.
Position encoder
inputs
Scales for linear axes or angle encoders for rotary axes/spindles may be connected here.
Polyfuses
On machines with digital axes and spindles that are not equipped with position encoders, the
position is captured via motor encoders.
See “Speed encoders” on page 19 – 300.
CC 6106 CC 6108 CC 6110
X201 to X206 X201A to X204A
(controller basic board A)
X201B to X204B
(controller basic board B)
X201A to X204A
(controller basic board A)
X201B to X206B
(controller basic board B)
UEC 111 UEC 112
X201 to X204 X201 to X205
CC 61xx and UEC 11x feature "polyfuses".
Polyfuses are electronic fuses that become highly resistive if an overload occurs and thus
separate defective peripherals (e.g., scales) from the low voltages of the CC 61xx or the UEC 11x.
Polyfuses are equipped with a self-resetting function ("self-healing effect").
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