Readhead Mounting And Alignment - Renishaw TONiC RESM20 Installation Manual

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
Readhead set-up LED status
Green Orange Red
Green spacer
Optical centreline
Pitch
0° ±1°
TONiC RESM20 angle encoder system installation guide
('Restoring factory defaults', page 18).
Yaw
0° ±0.4°
0° ±0.5°
Rideheight
2.1 ± 0.15 mm
T20x1 readhead LED diagnostics
LED
Incremental
Set-up
Reference
mark
Operating
CAL
Calibration
Reset
*
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
Purple
Blue
Green
Orange
Red
Incremental
Roll
Red / blank -
flashing
Blue / blank -
flashing
Purple / blank -
flashing
Reference
Blank flash
mark
†
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
and is also available from your local representative.
Indication
Green Normal set-up: signal level > 70%
Orange Acceptable set-up; signal level 50% to 70%
Poor set-up; signal may be too low for reliable
Red
operation; signal level < 50%
Green (flash)* Normal phasing
Orange (flash) Acceptable phasing
Red (flash) Poor phasing; clean scale and recalibrate if required
On Automatic Gain Control – On
Off Automatic Gain Control – Off
Single flashing Calibrating incremental signals
Double flashing Calibrating reference mark
Flashing at
Restore factory defaults
power-up (< 2s)
Status
Normal setup; signal level 110% to 135%
Optimum setup; signal level 90% to 110%
Normal set-up: signal level 70% to 90%
Acceptable set-up; signal level 50% to 70%
Poor set-up; signal may be too low for reliable
operation; signal level < 50%
Poor set-up; signal level < 20%; system in error
Over speed; system in error
Over signal; system in error
Reference mark detected (speed < 100 mm/s only)
www.renishaw.com/tonicdownloads
Status
Alarm
†
output
No
No
No
No
No
Yes
Yes
Yes
No
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