Renishaw TB20 User manual

#renishaw
www.renishaw.com/tb20
TB20 quadrature trigger box

2TB20 quadrature trigger box www.renishaw.com/tb20
Contents
Legal information � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
Safety information� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5
What is TB20? � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8
TB20 kit components � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9
TB20 interface � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 10
TB20 congurations � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 11
Test overview � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 12
TB20 set-up � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 13
Trigger interval set-up � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 14
Switch set-up � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 16
Data capture� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 17
Data capture reset button� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 18
Quasi-static data capture using CARTO Capture� � � � � � � � � � � � � � � � � � � � � 19
Dynamic data capture using LaserXL dynamic measurement � � � � � � � � � � � 20
Data analysis � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 21
Diagnostics� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 22
Power LED � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 22
Status LED � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 23
System specications� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 24
Encoder types supported � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 25
Environment � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 26
Maximum velocities � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 26
Weights and dimensions � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 27
Appendix A � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 28
Wiring � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 28
Appendix B � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 29
Accuracy� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 29
Delays in open loop � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 29
Accuracy - Delays in closed loop � � � � � � � � � � � � � � � � � � � � � � � � � � � � 30

3www.renishaw.com/tb20TB20 quadrature trigger box
Legal information
Warranty
Equipment requiring attention under warranty must be returned to your
equipment supplier.
Unless otherwise specically agreed in writing between you and Renishaw,
if you purchased the equipment from a Renishaw company, the warranty
provisions contained in Renishaw’s CONDITIONS OF SALE apply.
You should consult these conditions in order to nd out the details of your
warranty but, in summary, the main exclusions from the warranty are if the
equipment has been:
• neglected, mishandled or inappropriately used; or
• modied or altered in any way except with the prior written agreement
of Renishaw.
If you purchased the equipment from any other supplier, you should contact
them to nd out what repairs are covered by their warranty.

4TB20 quadrature trigger box www.renishaw.com/tb20
Legal information
International regulations and conformance
EC and UKCA compliance
Renishaw plc declares that the TB20 quadrature trigger box complies with
the applicable standard and regulations.
Renishaw plc hereby declares that the TB20 quadrature
trigger box is in compliance with the essential requirements
and other relevant provisions of Directive 1999/5/EC.
Contact Renishaw plc or visit
http://www.renishaw.com/en/certication--38812
for the full EC declaration of conformity.
Disposal of waste electrical and electronic equipment
The use of this symbol on Renishaw products and/or
accompanying documentation indicates that the product should
not be mixed with general household waste upon disposal. It is
the responsibility of the end user to dispose of this product at
a designated collection point for waste electrical and electronic
equipment (WEEE) to enable reuse or recycling. Correct
disposal of this product will help to save valuable resources and
prevent potential negative effects on the environment. For more
information, please contact your local waste disposal service or
Renishaw distributor.
RoHS compliance
Compliant with EC directive 2011/65/EU (RoHS).
Packing material information
Packaging component Material ISO 11469 Recycling
guidance
Outer box
Cardboard Not applicable Recyclable
Polypropylene PP Recyclable
Loose form packing Maize starch Not applicable Recyclable
Bags
Low density polyethylene LDPE Recyclable
Metalised polyethylene PE Not currently
recyclable

5www.renishaw.com/tb20TB20 quadrature trigger box
Safety information
ENSURE THAT YOU READ AND UNDERSTAND THE TB20 USER GUIDE
BEFORE USING ANY TB20.
The TB20 can be used in a variety of environments and applications.
To ensure the safety of the user and other personnel in the vicinity it is
therefore paramount that a comprehensive risk assessment is carried out
for the machine under test before using the TB20. This should be carried
out by qualied users (requiring machine competency, applicable technical
knowledge and a trained risk assessor) with consideration for the safety of all
personnel. The risks identied must be mitigated prior to using the product.
The risk assessment should pay particular attention to machine, manual
handling, mechanical, laser, electrical and power.
General safety information
The TB20 quadrature trigger box is designed for integration into the primary
position feedback loop of a motion system. It is essential that the system is
installed in accordance with the instructions in the installation manuals and it
is the responsibility of the system integrator to ensure that, in the event of a
failure of any part of the TB20, the motion system remains safe.
In motion systems with powers or speeds capable of causing injury, safety
protection measures must be included in the design. It is recommended that
satisfactory operation of these protection measures is veried before the
feedback loop is closed. The following safety protection measures should
be used. For closed loop operation it is the sole responsibility of the system
integrator to select appropriate measures for their application.
1� The axis must include physical limit switches which, when tripped,
will stop axis motion before damage occurs (soft limits alone are
insufcient). Note that in the case of thermally compensated systems,
positional corrections of several hundred ppm are possible. This should
be taken into account when dening the relative positions of soft and
hard axis limits.
2� Cable breakage detection (encoder disconnect). The position feedback is
provided as differential line driven pairs. Failure in the cable or of the line
drivers can be detected by checking these differential pairs are always
being driven in opposing states. If the lines are not in opposing states,
the motion must be stopped.
3� Motor torque monitoring. If the motor torque exceeds an expected limit,
the axis of motion must be stopped.
4� The machine must include an emergency stop button.
5� Following error detection. If the difference between the controller demand
position and the axis feedback position exceeds an expected limit, the
axis motion must be stopped.
6� Guards, viewing windows, covers and interlocks may be used to prevent
user access to hazardous areas, and to contain ejected parts or materials.
7� If the machine includes an independent tacho (velocity) feedback system,
this should be cross-checked with the position feedback. For example, if
the tacho indicates the axis is moving, but the position feedback doesn’t,
the axis motion must be stopped.
NOTE: In the case of measures 5 to 7, the limits need to be selected carefully
depending on the application and the type of position compensation selected
to avoid false alarms.

6TB20 quadrature trigger box www.renishaw.com/tb20
WARNING: There are no user-serviceable parts inside the
TB20. Do not remove any part of the housing.
THE DEVICE COMPLIES WITH PART 15 OF THE FCC
RULES. OPERATION IS SUBJECT TO THE FOLLOWING
CONDITIONS: (1)THIS DEVICE MAY NOT CAUSE HARMFUL
INTERFERANCE. (2)THIS DEVICE MUST ACCEPT ANY
INTERFERENCE RECEIVED. INCLUDING INTERFERENCE
THAT MAY CAUSE UNDESIRED OPERATIONS.
Safety labelling
CAUTION: Ensure that you read and understand the TB20
user guide before using any TB20.

7www.renishaw.com/tb20TB20 quadrature trigger box
Mechanical safety
• Beware of trip hazards that may be created when using the TB20 in
conjunction with other systems, for example due to trailing cables.
• Exercise caution if components are to be mounted to moving or rotating
machinery. Beware of cables becoming entangled.
• Exercise extreme caution if system components are to be mounted to
machinery that may accelerate rapidly or move at high speed, which
could lead to items colliding or being ejected.
• If it is necessary to operate the machine with the guards or any
safety feature removed or disabled, it is the responsibility of the
operator to ensure that alternative safety measures are taken in
line with the machine manufacturer’s operating instructions or
relevant codes of practice.
• If you are using a part program or error correction parameters generated
by the Renishaw software, it is the responsibility of the user to validate
these at low feedrate and be prepared to operate the emergency stop
button if necessary.
Electrical and power safety
• The TB20 has been qualied for use with the power supply cable and the
plug adaptor kit supplied with the system. A specication for the power
supply requirements can be found on page 24�
• In the event of damage to the power adaptor, all power must be isolated
from the equipment before any other action is taken.
• Never connect the system to devices not intended to be used with
the TB20�

8TB20 quadrature trigger box www.renishaw.com/tb20
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
System
What is TB20?
TB20 is an interface which is used with Renishaw’s XL laser calibration system.
TB20 reads output from an encoder and generates a trigger for the laser
system at predetermined intervals. Typical uses are leadscrew calibration
and motion control set-up.
The basic operation principle is:
• TB20 receives quadrature input pulses from an encoder system.
• For every ‘Nth’ input pulse it generates a TPin trigger
(N is dened by the user).
• The XL laser records the laser reading when the TPin trigger is received.
• TB20 can regenerate the original quadrature pulses for the controller
so the servo loop is not broken.
NOTE: For information on delay durations for signal regeneration at the
controller port and for trigger generation refer to Appendix B�

9www.renishaw.com/tb20TB20 quadrature trigger box
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
System
1TB20 trigger box
2XL trigger cable
3Power supply cable
4Plug adaptor kit
5TB20 encoder and
controller port connectors
6Calibration user guide card
TB20 kit components 1
4
3
2
5
Laser calibration user guides can be found at:
Benutzerhandbücher zur Laserkalibrierung finden Sie unter:
レーザー計測ユーザーガイドは、次のサイトをご覧ください：
雷射校准使用指南位於：
激光校准使用指南可从雷尼绍网站下载：
Las guías de usuario de calibración se pueden encontrar en:
레이저 캘리브레이션 사용자 안내서가 제공되는 웹 페이지:
www.renishaw.com/caluserguides
M-9904-4443-01-A
Laser calibration user guides
EN
DE
JA
ZH-TW
ZH
ES
KO
6

10 TB20 quadrature trigger box www.renishaw.com/tb20
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
TB20 interface
1USB port
2Power LED
3Trigger interval switches
4Encoder port
5Controller port
6Trigger port
7Status LED
8Conguration switches
9Reset switch
1
2
3
4
5
6
7
8
9
System

11www.renishaw.com/tb20TB20 quadrature trigger box
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Configuration
TB20 congurations
Open loop Closed loop

12 TB20 quadrature trigger box www.renishaw.com/tb20
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Configuration
Data analysis
Data capture
Switch set-up
Trigger interval set-up
TB20 set-up
Test overview
XL-80 set-up *
Set-up
Conguration
Capture
NOTE: * For XL-80 set-up procedure,
please refer to XL-80 user guide F-9908-0683.

13www.renishaw.com/tb20TB20 quadrature trigger box
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Configuration
Connect the USB power supply to the electrical outlet
Congure switch settings
Connect the trigger port on TB20 to auxiliary I/O
connector on the XL laser
Connect the controller to the controller port (if required)
Connect the encoder to the encoder port
TB20 set-up
NOTE: For TB20 encoder and controller port pin-outs refer to Appendix A�
Connect the USB power supply cable to TB20

14 TB20 quadrature trigger box www.renishaw.com/tb20
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Configuration
Trigger interval set-up
To congure the trigger interval on the TB20 the ‘trigger interval’ switch is used. The input is a decimal value (“00000” is not permitted).
The values for this switch can be set by reference to the table below or by calculation on the following page.
Encoder resolution 5 µm 1 µm 0.5 µm 0.1 µm
Trigger interval TB20 setting Step size TB20 settings Step size TB20 settings Step size TB20 settings
10 µm 00001 2 µm 00001 1 µm 00001 0�2 µm 00001
30 µm 00003 6 µm 00003 3 µm 00003 0�6 µm 00003
50 µm 00005 10 µm 00005 5 µm 00005 1 µm 00005
100 µm 00010 20 µm 00010 10 µm 00010 2 µm 00010
300 µm 00030 60 µm 00030 30 µm 00030 6 µm 00030
500 µm 00050 100 µm 00050 50 µm 00050 10 µm 00050
1 mm 00100 200 µm 00100 100µm 00100 20 µm 00100
3 mm 00300 600 µm 00300 300 µm 00300 60 µm 00300
5 mm 00500 1 mm 00500 500 µm 00500 100 µm 00500
10 mm 01000 2 mm 01000 1 mm 01000 200 µm 01000
30 mm 03000 6 mm 03000 3 mm 03000 600 µm 03000
50 mm 05000 10 mm 05000 5 mm 05000 1 mm 05000
100 mm 10000 20 mm 10000 10 mm 10000 2 mm 10000
60 mm 25000 30 mm 25000 6 mm 25000
100 mm 50000 50 mm 50000 10 mm 50000

15www.renishaw.com/tb20TB20 quadrature trigger box
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Configuration
Trigger interval set-up
For custom trigger interval use the calculation: TB20 setting (in decimal) = desired trigger interval (microns)
2 × encoder resolution (microns)
Signal period
Resolution
Backwards Forwards
AQUAD
BQUAD
A
B
Forwards Backwards
Resolution
Pitch
Cosine
Sine
1 Vpp
2.5 V DC offset
RS422 digital quadrature Analogue quadrature
Where the encoder resolution is dened as:

16 TB20 quadrature trigger box www.renishaw.com/tb20
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Configuration
ON
OFF
Switch set-up
The TB20 must be congured to specify the type of encoder connected and the type of trigger required. This is achieved using the ‘conguration switches’.
Switch number 1 2 3 4 5 6,7,8
Function Trigger direction Encoder type Encoder type Trigger period Reserved
ON Bidirectional Backwards Analogue encoder 10 µA analogue Long (1 ms ± 1%)*
N/A
OFF Unidirectional Forwards Digital encoder 1 Vpp analogue Short (10 µs ± 1%)*
NOTE: * This setting suits connectivity with XL laser and should be interfaced to the fast trigger input on the auxiliary I/O connector on the XL laser.

17www.renishaw.com/tb20TB20 quadrature trigger box
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Data Capture
Data capture
Two types of data capture can be achieved with TB20 using the XL-80 TPin
function:
• Quasi-static – the bed moves via predened intervals and stops for the
measurement to be taken.
• Dynamic – the bed moves continuously and TB20 triggers measurements
to be taken.
It is recommended to perform the quasi-static data capture using CARTO
Capture, whereas dynamic data capture will require LaserXL software.
CARTO Capture software
Laser XL software
NOTE: For full details on TPin please refer to the CARTO Capture user guide
(Renishaw product no. F-9930-1007) or the LaserXL manual (Renishaw
product no. M-9908-9137).

18 TB20 quadrature trigger box www.renishaw.com/tb20
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Data Capture
Data capture reset button
The ‘RESET’ button provides the following functionality:
• Datum and capture the rst point at the beginning of a test.
• Clear any error conditions logged by the TB20
(providing the source of the error has been removed).
• Update any changes to switch congurations.

19www.renishaw.com/tb20TB20 quadrature trigger box
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Data Capture
Quasi-static data capture using CARTO Capture
For full details on Capture please refer to the CARTO Capture user guide (Renishaw product no. F-9930-1007).

20 TB20 quadrature trigger box www.renishaw.com/tb20
System
Data Analysis
Configuration
Diagnostics
Data Capture
Specifications
Data Capture
Dynamic data capture using LaserXL dynamic measurement
For full details on Dynamic data capture and analysis please refer to the LaserXL manual (Renishaw product no. M-9908-9137).