ERM 2900 series

    Specifications

    Scanning head

    AK ERM 2980

    Interface

      1 VPP

    Cutoff frequency –3 dB

    ≥ 300 kHz

    Signal period

    ≈ 1000 µm

    Line count*

    See ''Scale drum”

    Electrical connection*

    Cable 1 m, with or without coupling, tangential or axial cable outlet

    Cable length

    ≤ 150 m (with HEIDENHAIN cable)

    Voltage supply

    5 V DC ± 0.5 V

    Current requirement

    ≤ 150 mA (without load)

    Vibration 55 to 2000 Hz

    Shock 6 ms

    ≤ 400 m/s2 (EN 60 068-2-6)

    ≤ 1000 m/s2 (EN 60 068-2-27)

    Operating temperature

    –10 °C to +100 °C

    Protection EN 60 529

    IP67

    Mass

    ≈ 0.15 kg (with cable)

    Scale drum

    ERM 2904

    Measuring standard

    MAGNODUR graduation; signal period ≈ 1000 µm

    Line count*

    192

    256

    300

    400

    Position error per
    signal period 1)

    ±68''

    ±51''

    ±44''

    ±33''

    Accuracy of graduation

    ±68''

    ±51''

    ±44''

    ±33''

    Reference mark

    One

    Inside diameter*

    40 mm

    55 mm

    60 mm

    100 mm

    Outside diameter

    58.06 mm

    77.41 mm

    90.72 mm

    120.96 mm

    Mech. permissible speed

    ≤ 47 000 rpm

    ≤ 35 000 rpm

    ≤ 29 000 rpm

    ≤ 16 000 rpm

    Moment of inertia of rotor

    0.07 · 10-3 kgm2

    0.22 · 10-3 kgm2

    0.45 · 10-3 kgm2

    0.92 · 10-3 kgm2

    Permissible axial motion

    ±0.5 mm

    Mass approx.

    0.11 kg

    0.19 kg

    0.30 kg

    0.30 kg

    * Please select or indicate when ordering

    1) The position error within one signal period and the accuracy of the graduation result together in the encoder-specific error; for additional error through mounting and the bearing of the measured shaft, see Measuring accuracy

    Other line counts/dimensions upon request