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ERM 2900 Series

Scanning head

AK ERM 2980

Incremental signals

1 VPP

Cutoff frequency –3 dB

≥ 300 kHz

Signal period

Approx. 1 000 µm

Line count*

See “Scale drum”

Power supply

5 V DC ± 10 %

Current consumption

≤ 150 mA (without load)

Electrical connection*

Cable 1 m, with or without coupling; cable outlet axial or radial

Cable length

≤ 150 m (with HEIDENHAIN cable)

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

IP 67

Weight

Approx. 0.15 kg (with cable)

Scale drum

ERM 2904

Measuring standard

MAGNADUR graduation; signal period of approx. 1000 µm

Inside diameter*

40 mm

55 mm

60 mm

100 mm

Outside diameter

58.06 mm

77.41 mm

90.72 mm

120.96 mm

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

Mech. permissible speed

≤ 47 000 min-1

≤ 35 000 min-1

≤ 29 000 min-1

≤ 16 000 min-1

Moment of inertia of the 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

Weight 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