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4. Dedicated Options
4 - 8
4-2 Machine side detector
In MDS-R series, the relative position specifications and rectangular wave output linear scale are
available.
The machine side detectors are all special order parts, and must be prepared by the user.
Relative position detector
Select a machine side relative position detector that has specifications that are correspond to the
following output signal.
Compatible rectangular wave output specifications
Select a relative position detector with an A/B phase difference and Z-phase width at the maximum
feedrate that satisfies the following conditions.
Use an A, B, Z-phase signal type with differential output (RS-422 standard product) for the output
signal.
Phase difference
Z-phase
0.1s or more
A
-phase
Integer mm
B-phase
0.1s or
more
For a scale having multiple Z phases, select the neighboring Z
phases whose distance is an integral mm.
O
utput circuit
A
, B, Z-phase
A
, B, Z-phase
(Note) The above value is minimum value that can be received normally in the servo drive unit side.
In an actual selection, ensure margin of 20% or more in consideration of degradation of electrical wave and
speed overshoot.
<Example of scale specifications >
The example of using representative oblong save scale is shown below.
For specifications of each conversion unit and scale and for purchase, contact each corresponding
manufacture directly.
Combination
conversion unit
Scale Type Manufacturer Minimum resolution Maximum speed
1μm 150m/min
0.5μm 120m/min
0.1μm 24m/min
SR33 CN33 SONY
0.05μm 12m/min
1μm 120m/min
IBV610
0.5μm 120m/min
IBV650 0.1μm 48m/min
LS186/LS486 HEIDENHAIN
0.1μm 60m/min
IBV660B
0.05μm 30m/min