16
TONiC RESM20 angle encoder system installation guide
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 scale, readhead optical window and mounting face are clean and free from obstructions. 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) for a complete rotation. If a digital Ti/TD interface is used, aim
for a Blue LED on the interface.
NOTE:
The readhead should be installed and set-up with the AGC switched off (CAL LED off).
When re-installing, factory defaults should be restored
(‘Restoring factory defaults’, page 18)
Yaw
0° ±0.4°
Pitch
0° ±1°
Roll
0° ±0.5°
Rideheight
2.1 ± 0.15 mm
Optical centreline
Green Orange Red
Readhead set-up LED status
Green spacer
LED
Indication
Status
Set-up
Incremental
Green
Normal set-up: signal level > 70%
Orange
Acceptable set-up; signal level 50% to 70%
Red
Poor set-up; signal may be too low for reliable
operation; signal level < 50%
Reference
mark
Green (flash)*
Normal phasing
Orange (flash)
Acceptable phasing
Red (flash)
Poor phasing; clean scale and recalibrate if required
CAL
Operating
On
Automatic Gain Control – On
Off
Automatic Gain Control – Off
Calibration
Single flashing
Calibrating incremental signals
Double flashing
Calibrating reference mark
Reset
Flashing at
power-up (< 2s)
Restore factory defaults
*
Flash will effectively be invisible when incremental signal is > 70% when passing reference mark.
Ti0004 to Ti20KD and TD4000 to TD0040 interface LED diagnostics
Signal
Indication
Status
Alarm
output
†
Incremental
Purple
Normal setup; signal level 110% to 135%
No
Blue
Optimum setup; signal level 90% to 110%
No
Green
Normal set-up: signal level 70% to 90%
No
Orange
Acceptable set-up; signal level 50% to 70%
No
Red
Poor set-up; signal may be too low for reliable
operation; signal level < 50%
No
Red / blank -
flashing
Poor set-up; signal level < 20%; system in error
Yes
Blue / blank -
flashing
Over speed; system in error
Yes
Purple / blank -
flashing
Over signal; system in error
Yes
Reference
mark
Blank flash
Reference mark detected (speed < 100 mm/s only)
No
†
Alarm output will take the form of 3-state or line driven E− signal depending on interface configuration.
Also, some configurations do not output overspeed alarm.
•
Momentary status only, while fault condition remains.
•
Alarm may result in axis position error, re-datum to continue.
See the product nomenclature for interface configuration in the
TONiC encoder system
Data sheet
(Renishaw part no. L-9517-9337). This can be downloaded from our website at
www.renishaw.com/tonicdownloads
and is also available from your local representative.
T20x1 readhead LED diagnostics