RAMK060

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Vishay MCB

Revision: 03-May-2022

13

Document Number: 32579

For technical questions, contact: mcbprecisionpot@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

APPROACH NO. 2: SELF-CALIBRATION

Comment: it is the case for the customer’s equipment whose mechanical tolerances are NOT under the tolerances described

in Approach No. 1, a self-calibration can be used to compensate the misalignment (= eccentricity between rotor axis and stator

axis) and the runout of the customer shaft for the rotor centering (eccentricity mounting of the rotor).

Other case where the self-calibration has to be used, it is when the sensor sets the auto-calibration flag (conditions to use the

self-calibration procedure: Table 14).

Self-Calibration Procedure

1. How to know if the encoder needs a self-calibration

a. Mount the encoder

b. Plug the connector

c. Turn-on the power supply

d. Turn the rotor (at least 360°)

e. Look at the LED color

Reminder: similar data are available across the output frame “status bits of self-monitoring”:

• “Normal operation” = green color

• “Need self-calibration” = orange color

• “Mechanical mounting error” = red color

2. How to do the self-calibration

a. The encoder is mounted, the connector is unplug

b. Plug the shunt supplied by Vishay and turn-on the power supply (the red LED is blinking)

c. Turn the rotor with a maximum rotation speed of 10 rpm (at least 360°) (acquisition of data = the orange LED is blinking)

d. When the green and orange LEDs are blinking, the correction calculation is in progress

e. When the green LED is blinking, the correction calculation is finished

f. Turn off the power supply and unplug the shunt

g. Plug the connector, turn-on the power supply, turn the rotor (at 360°) and look at the LED color.

Green LED: ON | Red LED: OFF | Orange LED: OFF

h. The encoder is ready to be used with full performances

Note

• The procedure of self-calibration is also described in video available to ask for Vishay

Case 1

Green LED: ON

Red LED: OFF

Orange LED: OFF

The encoder is ready to be used with full performances

Case 2

Green LED: OFF

Red LED: ON

Orange LED: OFF

Bad mechanical position, adjust the mechanical position

Case 3

Green LED: OFF

Red LED: OFF

Orange LED: ON

Do the self-calibration

SUMMARY

LED COLOR

STATUS

ACTION

Green

Ready to use with full performances

None

Orange

The resolution and / or the accuracy might be out of specification

Do the self-calibration

Red

Bad mechanical position

Adjust the mechanical position

No light

No power

Check the power supply