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Incremental
Encoders
Incremental encoders deliver a defined number of electrical
pulses for each rotation, which represent the measurement
of the distance or angle moved.
Incremental encoders operate on the principle
of optoelectronic scanning of index disks operating on the
transmitted light principle. The light source is a light emitting
diode (LED). The lightdark modulation generated as the encoder
shaft rotates is picked up by optoelectronic elements.
In the case of incremental encoders, the
machine must travel to a reference point after each power-off
state, as the position is not usually stored in the controller,
and movements of the machine while the power is off are not
recorded.
For incremental encoders, the following output
levels are available:
TTL (RS422) difference signals can be used for general
application where the resolution can be improved by a factor
of 4 by means of edge evaluation.
1Vpp sinusoidal output type incremental encoder can
be used to obtain an even finer resolution since it is possible
to interpolate the output signal at higher-level controller.
Incremental encoders with HTL outputs are well suited
for applications with counter modules.
| Incremental |
TTL
Output with 5VDC or 10-30VDC power supply
(500, 1000, 1024, 1250,1500, 2000 2048, 2500, 3600
and 5000 steps per revolution), with axial/radial
flange socket or 1m axial/radial cable. |
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HTL Output with 10-30VDC power supply (100,
500, 1000, 2500 steps per revolution), with axial/radial
flange socket or 1m axial/radial cable. |
| Sinunosoidal
1Vpp Output (1000, 1024, 2500 steps per
revolution), with axial/radial flange socket or
1m axial/radial cable. |
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