PP 281

    Specifications

    PP 281 R

    Measuring standard

    Coefficient of linear expansion

    Two-coordinate TITANID phase grating on glass; grating period 8 µm

    αtherm  8 · 10-6 K-1

    Accuracy grade

    ± 2 µm

    Measuring range

    68 mm x 68 mm,

    other measuring ranges upon request

    Reference marks1)

    One reference mark in each axis, 3 mm after beginning of measuring length

    Interface

    1 VPP

    Signal period

    4 µm

    Cutoff frequency –3 dB

    300 kHz

    Traversing speed

    ≤ 72 m/min

    Electrical connection

    Cable, 0.5 m with D-sub connector (male), 15-pin; with interface electronics in the connector

    Cable length

    See Interface Description, but ≤ 30 m (with HEIDENHAIN cable)

    Voltage supply

    5 V DC ± 0.25 V

    Current requirement

    < 185 mA per axis

    Vibration 55 to 2 000 Hz

    Shock 11 ms

    ≤ 80 m/s2 (EN 60 068-2-6)

    ≤ 100 m/s2 (EN 60 068-2-27)

    Operating temperature

    0 °C to 50 °C (32 °F to 122 °F)

    Weight Scanning head

    Grid plate

    Connecting cable

    Connector

    170 g (without connecting cable)

    75 g

    37 g/m

    140 g

    1) The zero crossovers K, L of the reference-mark signal deviate from the interface specification (see the mounting instructions)