
11.SPINDLE-RELATED DETECTORS B-65282EN/05
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Sensor ring
Sensor ring (phase A/B ring) Sensor ring (phase Z ring)
Dimensions
Phase A/B ring) Phase Z ring
φA φBCφD φEFG
Ring 1, 2 52+0.0/-0.020 40+0.016/-0.0 10±0.1 52+0.0/-0.020 40+0.016/-0.0 8.6±0.1 6.7
Ring 3, 4 103.2+0.0/-0.020 82+0.0/-0.018 10±0.1 103.2+0.0/-0.020 82+0.0/-0.018 8.6±0.1 6.7
Ring 5 154.4+0.0/-0.020 125+0.025/-0.0 10±0.1 154.4+0.0/-0.020 125+0.025/-0.0 8.6±0.1 6.7
Ring 6 205.6+0.0/-0.020 160+0.020/-0.005 10±0.1 205.6+0.0/-0.020 160+0.020/-0.005 8.6±0.1 6.7
For the outside dimensions of the sensor, see "BZi sensor" described
earlier.
NOTE
• Press fit the rings on a sleeve, then install the sleeve on the spindle shaft.
• Used ring can be recycled only one time.
• The circumference has special teeth. Therefore carefully protect against deformation and chipping due to external
force.
• Check the feedback signal after mounting the sensor. For output signal adjustment, refer to "II. ASSEMBLY" in
"FANUC AC SPINDLE MOTOR αi
B series DESCRIPTIONS (B-65292EN)".
Allowable maximum speed
Ring 1 Ring 2 Ring 3 Ring 4 Ring 5 Ring 6
Sensor type No. T201 T211 T401 T411 T511 T611
Number of teeth 128 128 256 256 384 512
Max. speed (min
-1
) 20,000 70,000 15,000 30,000 15,000 10,000
NOTE
• Interference for shrink fitting of the rings is changed according to the maximum speed of spindle. Refer to
"Tightening allowance" described later.