EVOLUTE RTLA50-S installation guide
7
Customer
electronics
Extension
cable*
Shield
Serial
communication
signals
0 V
5 V
Readhead
Electrical connections
EVOLUTE grounding and shielding
Connector
Scale technical specifications
RTLA50-S
Material
Hardened and tempered martensitic stainless steel fitted
with a self-adhesive backing tape
Form
0.4 mm x 8 mm (H x W) (includes adhesive)
Datum fixing
Datum clamp (A-9585-0028) secured with Loctite 435
Accuracy
(at 20 °C)
±10 µm/m, calibration traceable to International Standards
Coefficient of thermal expansion
(at 20 °C)
10.1 ±0.2 µm/m/°C
Maximum length*
10.02 m
Mass
12.2 g/m
Readhead mounting/installation
Mounting brackets
The bracket must have a flat mounting surface, enable conformance to the installation tolerances, allow
adjustment of the rideheight of the readhead, and be sufficiently stiff to prevent deflection of the readhead
during operation.
Readhead set-up
Ensure that the scale, readhead optical window and mounting face are clean and free from obstructions.
To set nominal rideheight for RTLA50-S installations, use the blue 0.8 mm readhead spacer to set
rideheight. Adjust the readhead to maximize the signal strength along the full axis of travel to achieve a
Green LED.
Readhead set-up LED status
Green Orange Red
NOTE
: A position error will trigger the
set-up LED to flash continuously until
the error is no longer present AND:
1. Power has been cycled OR
2. A position request has been
received from the controller.
Yaw
0° ±0.75°
Pitch
0° ±0.5°
Roll
0° ±0.5°
Rideheight
0.8 ±0.25 mm
IMPORTANT:
Only use
0.8 mm blue spacer.
IMPORTANT:
The shield should be connected to the machine earth (Field ground).
IMPORTANT:
If the connector is modified or replaced, the customer must ensure both 0 V cores
(White and Green) are connected to 0 V.
*For maximum extension cable length please consult your local Renishaw representative.
*For lengths >2 m FASTRACK with RTLA50 is recommended.
