Heidenhain’s ERP 1000 can be flexibly integrated into a machine, a capability achieved through a variety of modules with different circular scale sizes. These variants are available as full-circle and segment versions in diameters of 57, 75, 109 and 151 mm, allowing them to accommodate nearly any requirement.
Compact dimensions and lightweight scales and scanning heads also contribute to their flexibility. The head is 26 mm long, 12.7 mm high, 6.8 mm wide and weighs just 5 g, while the scales are 10.2 mm high and the lightest full-circle scale weighs 57 g. These small dimensions and low weights impose almost no limits on how the encoders can be deployed, while low moments of inertia make them suitable for dynamic applications with high shaft speeds up to 2,600 rpm.
An OPTODUR graduation on glass represents the measuring standard of the ERP 1000 family of angle encoders. Depending on diameter, different circular scales feature signal periods of 23,000, 30,000, 50,000 or 63,000. In combination with the Heidenhain HSP 1.0 signal processing ASIC, the encoders achieve accuracies of down to ±0.9 arc-second. In addition, ERP 1000 encoders offer an interpolation error down to ±0.02 arc-second, while RMS position noise can be as low as 0.002 arc-second. At the same time, noise immunity during scanning ensures reliability, says the company.
As a non-paired system, the ERP 1000 offers generous mounting and operating tolerances. For example, the encoder is said to achieve high measurement accuracies, even if the mounting surface for the circular scale has not been perfectly machined. However, the better the mounting conditions, the higher the achievable accuracies.
For the electrical connection of the scanning head to the machine control, a selection of cables and connectors is available. In addition, all of the scanning heads are available with a variety of cable lengths. The incremental signals and reference signal are adjusted automatically using the Heidenhain PWM 21 measuring and test device.
