Output Signals And Supplying Miniscale Plus And Interface Module; Supply Voltage And Current Consumption; Analog Interface Module (Analog Signal 1Vss) - Schneeberger MINISCALE PLUS Manual

6
Output Signals and Supply
6.1

Supply Voltage and Current Consumption

6.2

ANALOG Interface Module (Analog Signal 1Vss)

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The sensor head in the carriage sends sinusoidal output signals when the carriage
is moved relative to the dimensional scale along the guide rail.
These signals are interpreted in the interface module and displayed in analog
(see chapter 6.2) or digital form (see chapter 6.3), depending on the type of
interface module.
Supply voltage: 5 V DC +/- 5%
This must be adhered to in order to generate output signals.
Current consumption: 60 mA (analog) / 70 mA (digital)
6.2.1 Output Format:
Differential, sin/cos analog signals with reference pulse
1 Vss (at 100Ω)
The incremental sine and cosine signals are displaced 90° and correlate with the
markings on the incremental track. One electrical signal period (360°) corresponds
exactly to the scale increment on the dimensional scale, which amounts to 100 μm.
The reference pulse always marks electrically a particular section of the path of the
sine and cosine signals. The point of intersection of the two signals within the
reference pulse marks a precisely defined position on the dimensional scale.
The sine signal either lags behind the cosine signal or occurs before it, depending
on the direction of movement.
Single-ended signals
Ua +
1
Ua -
1
Ua +
2
Ua -
2
Ua +
0
Ua -
0
The analog signal must be interpolated by the customer in order to achieve an
appropriate resolution (e.g. Period 100 µm, interpolation 250 times, analysed 4 times
results in a resolution of 0.1 µm. The frequency of the electronics must be adjusted
to the travelling speed. E.g. A speed of 2 m/s with signal period before interpolation
of 100 µm results in a frequency of 20 kHz (see calculation in chapter 9.3)
Differential signals
+
-
+
-
+
-
2.3V
0.5V
Reference point
100μm
Sine
Cosine
Reference
≈100μm
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