Incremental Angle Measuring System MI

General

Through the purely inductive measuring system, maximum system accuracies smaller than +/-2um arc length can be realized.

The measuring system consists of a solid measure with incremental code as well as a measuring head with sensor and analog-digital evaluation electronics. Depending on requirements, single or multi-head scanners are available. The measuring ring is mounted directly on the bearing inner ring.

The integrated measuring system is available for sizes 150 to 650. For some sizes, the overall height is greater than the standard bearing without measuring system (see product tables). The measuring head is integrated into the surrounding structure or mounted directly on the outer ring using a distance plate. The distance plate must be provided by the customer.

Characteristics

Size and Encoding

Available from size 150 to 650 mm
Incremental encoding

Measuring Head

Miniature measuring head with minimal installation dimensions
Single and multi-head scanner options
Multi-head scanning eliminates eccentricity and radial runout errors

Environmental Performance

Dirt resistant IP67
Resistant to magnetic interference fields
Working temperature -10C to +100C

Output Signals

Integrated reference pulse, also distance-coded
Analog output signals (1V_SS), subdivided signal period up to 15um
Digital output RS-422 / TTL, resolution up to 0.125 um

Single-Head Measurement (Axial)

No.	Component	Description
1	AXRY-MI	Bearing with measuring ring
2	Measuring Head	Axially mounted inductive measuring head
3	Distance Plate	For correct positioning of measuring head
4	External Evaluation Electronics	Signal processing unit

Double-Head Measurement (Radial)

No.	Component	Description
1	AXRY-MI	Bearing with measuring ring
2	Measuring Head	Radially mounted inductive measuring head
3	Distance Plate	For correct positioning of measuring head
4	MHS Evaluation Electronics	Multi-head system signal processing unit

Recommendation Distance Plates for Incremental Measuring Heads

If you want to mount the incremental measuring head directly to the bearing outer ring, a distance plate is required. M4 threads at a spacing of 51mm are already present on the bearing outer ring. These threads are suitable for both absolute measuring heads and for mounting distance plates for incremental measuring heads (via M3 threads at 16mm spacing).

For the incremental measuring head to measure at the correct position, two distances DP-L and DP-H must be adjusted using the distance plate.