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Linear encoders - Optical
A UniSlide with ACU-RITE digital readout system
A BiSlide with ACU-RIte encoder and DRO
The reader head is mounted to the slider, as shown, providing a
true measurement of slider position. ACU-Rite
data sheet.pdf Encoder
dimensions
Two resolutions available are
- 0.0002”/5 µm
- 0.00005”/1 µm
Scales can be provided from 2" to 90" long.
Linear encoders - Magnetic
Velmex can mount Elgo Electric
EMIX 23 Magnetic incremental linear encoders on outside edge
of BiSlide Carriages.
Specs
for encoder |
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DIGITAL READOUT OPTIONS DROs
read the scales
| Single axis Model QC-10V DRO
(More
details) |
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| One, Two
or Three Axis
Model QC-100 Series DRO
See
also Metronic web site.
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Alternatively, linear
encoder output can also be transmitted to a PC directly using
a PCI card like this one. It can read up to 4 encoders. We
do not sell this.
Purchase
it here. |
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Rotary encoder

| Encoders have quadrature
output using 5 V logic and are stocked in the following resolutions:
100, 200, 250, 400, and 500 counts per revolution (CPR). See
Encoder
selection to view resolution with
encoder. |
When combined with a DRO
readout, the encoder counts are converted to inches for the
English thread or centimeters for the metric thread lead screws.
For rotary tables, the encoder can be mounted on a motor
shaft extension. It will read degrees on the DRO. |
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Encoder mounted on the back end of a NEMA
34 motor double shaft motor |
Potentiometer and gear train analog encoder

A small gear train and potentiometer may be attached
to the lead screw. Application of a stable voltage source across
the potentiometer provides a voltage output proportional to the
slider position. This voltage may be applied as an input to an X-Y
recorder, to an A/D converter for computer control, or to a comparator
circuit for analog position control. In many cases, a direct resistance
measurement as a position indicator is adequate. For most applications,
a precision 10-turn potentiometer produces the required voltage
signal. The gear train reduction ratio is selected to yield an output
of close to, but less than, 10 revolutions. Accuracy is within 1%
of travel.
Linear resistor strip analog encoder
Alternatively, for units up to 20" travel,
a linear strip variable resistor can be installed paralleling the
ways of the UniSlide Assembly. These resistor strips are available
in lengths from 2" to 20" and are normally 1.5K ohms/inch.
Accuracy is within 0.25%.

Encoder dimensions

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