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Readhead mounting and alignment
Mounting brackets
The bracket must have a flat mounting surface and should enable conformance to the installation
tolerances, allow adjustment to the rideheight of the readhead, and be sufficiently stiff to prevent
deflection or vibration of the readhead during operation.
Readhead set-up
Ensure that the ring, readhead optical window and mounting face are clean and free
from obstructions.
NOTES:
•
Ensure that the protective film is removed from the ring before installing the readhead.
•
When cleaning the readhead and ring apply cleaning fluid sparingly, do not soak.
To set nominal rideheight, place the green spacer with the aperture under the optical centre of
the readhead to allow normal LED function during set-up procedure. Adjust the readhead to
maximise the signal strength and achieve a green set-up LED on the readhead (> 70% signal)
and a blue LED on the Ti interface for the full distance of rotation.
NOTE: The readhead should be installed and set-up with the AGC switched off (CAL LED
off). When reinstalling, factory defaults should be restored (see
page 28).
26
TONiC
REXM20 / REXT20 angle encoder system installation guide
™
'Restoring factory defaults'
on
Readhead set-up LED status
Green
Orange
Red
Pitch
0° ±1.0°
Optical centreline
Yaw
0° ±0.4°
Roll
0° ±0.5°
Green spacer
Rideheight
2.1 ±0.15 mm
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