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Readhead mounting and alignment
Mounting brackets
The bracket must have a flat mounting surface and should provide adjustment to 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. It must not be allowed to work itself loose due to
vibration.
NOTES:
X
Recommended screw type M2.5 × 0.45 and must comply with:
ISO 4762/DIN 912 grade 8.8 minimum/ANSI B18.3.1M.
X
The use of a thread locking compound is recommended.
X
No washer is required under the screw head.
X
Minimum thread engagement 5 mm (7.5 mm including counterbore).
X
Tightening torque 0.25 Nm to 0.4 Nm.
X
Mounting hole clearance will contribute to mechanical safe position.
Readhead set-up LED status
Green Orange Red
* For further information on LED status
see page
TONiC RSLM20/RELM20 Functional Safety installation guide and safety manual
*
Pitch
0 ±1°
16.
Readhead set-up
Ensure that the scale, readhead optical window and mounting face are clean and free from obstructions.
NOTE: When cleaning the readhead and scale 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
along the full axis of travel to achieve a Green set-up LED on the readhead (>70% signal). If a DOP interface
is used, aim for a Blue LED on the interface.
NOTE: The readhead should be installed and set up with the Automatic Gain Control (AGC) switched off
(CAL LED off). When re-installing the readhead, factory defaults should be restored
Yaw
0° ±0.4°
Roll
0° ±0.5°
Green spacer
Rideheight
2.1 ±0.15 mm
Original instructions
(see page
*
DOP interface set-up LED status
Blue Green Orange Red
Purple
15).
14
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