Magnetic encoder withstands harsh environments

Heidenhain has developed the ERM 2200 magnetic rotary encoder series with a 200-µm signal period for use on varying rotary and tilting axes.

Using a smaller positioning error within one signal, the encoder allows machine tools to achieve high-accuracy requirements, the manufacturer states. With magnetoresistive scanning technology that is insensitive to contamination, the encoder can be used in harsh machine tool environments.

The compact drums are available with an ID of 2.76 to 14.96 in., and the overall height when mounted to the machine is 0.79 in. With distance-coded reference marks, the 2280 model has to move the axis only a maximum of 20 degrees during a homing routine to find a referenced position. That model is available with a 1 Vpp interface and can reach a maximum speed of 14,500 RPM.