HEIDENHAIN incremental rotary encoders have as measuring standard a graduated disk with a periodic grating of lines and gaps. A second track carries a reference mark. The reference mark defines an absolute reference position on the circular graduation and is permanently assigned to exactly one measuring step. On incremental rotary encoders the position value is determined by counting the measuring steps. HEIDENHAIN incremental rotary encoders allow resolutions of up to 500,000 measuring steps per revolution in position measurement. In systems with electrical drives and digital speed control, up to 8 million measuring steps per revolution are possible.

Selection aid: Incremental rotary encoders

 

Bearing	Coupling	Product family
With integral bearing	Mounted stator coupling	ERN
	Separate shaft coupling	ROD
Without integral bearing	None	ERO
		ERM