RENISHAW RKLC20 VIONiC Linear Encoder System Installation Guide

RKLC20 VIONiC Linear Encoder System

Installation guide M-6195-9477-01-E
VIONiCTM RKLC20-S linear encoder system

Contents

Legal notices

1

Storage and handling

3

VIONiC readhead installation drawing

4

RKLC20-S scale installation drawing

5

Scale application

6

End clamps

6

Reference mark selector and limit magnet installation 7

VIONiC encoder system quick-start guide

8

Readhead mounting and alignment

9

System calibration

10

Restoring factory defaults

11

Enabling/disabling AGC

11

Output signals

12

Speed

13

Electrical connections

14

Output specifications

15

General specifications

16

RKLC20-S scale specifications

17

Reference mark

17

Limit switches

17

VIONiC RKLC20-S linear installation guide

Legal notices

Copyright
© 2019­2021 Renishaw plc. All rights reserved. This document may not be copied or reproduced in whole or in part, or transferred to any other media or language by any means, without the prior written permission of Renishaw.

Trade marks
RENISHAW® and the probe symbol are registered trade marks of Renishaw plc. Renishaw product names, designations and the mark `apply innovation’ are trade marks of Renishaw plc or its subsidiaries. Other brand, product or company names are trade marks of their respective owners.

Patents
Features of Renishaw’s encoder systems and similar products are the subjects of the following patents and patent applications:

EP1173731 JP4932706 JP5386081 US7624513 CN1314511 US8466943

JP4750998 US7659992 US7550710 CN101310165 EP1469969

US6775008 CN100507454 CN101300463 EP1957943 EP2390045

CN100543424 EP1766335 EP1946048 US7839296 JP5002559

EP1766334 IN281839 JP5017275 WO2017203210 US8987633

Disclaimer
WHILE CONSIDERABLE EFFORT WAS MADE TO VERIFY THE ACCURACY OF THIS DOCUMENT AT PUBLICATION, ALL WARRANTIES, CONDITIONS, REPRESENTATIONS AND LIABILITY, HOWSOEVER ARISING, ARE EXCLUDED TO THE EXTENT PERMITTED BY LAW.
RENISHAW RESERVES THE RIGHT TO MAKE CHANGES TO THIS DOCUMENT AND TO THE EQUIPMENT, AND/OR SOFTWARE AND THE SPECIFICATION DESCRIBED HEREIN WITHOUT OBLIGATION TO PROVIDE NOTICE OF SUCH CHANGES.
Terms and Conditions and Warranty
Unless you and Renishaw have agreed and signed a separate written agreement, the equipment and/or software are sold subject to the Renishaw Standard Terms and Conditions supplied with such equipment and/or software, or available on request from your local Renishaw office.
Renishaw warrants its equipment and software for a limited period (as set out in the Standard Terms and Conditions), provided that they are installed and used exactly as defined in associated Renishaw documentation. You should consult these Standard Terms and Conditions to find out the full details of your warranty.
Equipment and/or software purchased by you from a third-party supplier is subject to separate terms and conditions supplied with such equipment and/or software. You should contact your third-party supplier for details.

Product compliance
Renishaw plc declares that the VIONiCTM encoder system complies with the applicable standards and regulations. A copy of the EU declaration of conformity is available from our website at www.renishaw.com/productcompliance
Compliance
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The user is cautioned that any changes or modifications not expressly approved by Renishaw plc or authorised representative could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
NOTE: This unit was tested with shielded cables on the peripheral devices. Shielded cables must be used with the unit to ensure compliance.
Further information
Further information relating to the VIONiC encoder range can be found in the VIONiC series encoder system data sheet (Renishaw part no. L-9517-9678), Advanced Diagnostic Tool ADTi-100 data sheet (Renishaw part no. L-9517-9699), Advanced Diagnostic Tool ADTi-100 and ADT View software quick-start guide (Renishaw part no. M-6195-9321), and the Advanced Diagnostic Tool ADTi-100 and ADT View software user guide (Renishaw part no. M-6195-9413). These can be downloaded from our website www.renishaw.com/vionicdownloads and are also available from your local Renishaw representative.

VIONiC RKLC20-S linear installation guide

1

Legal notices (continued)

Packaging
The packaging of our products contains the following materials and can be recycled.

Packaging Component

Material

Outer box

Cardboard

Polypropylene

Inserts

Low density polyethylene foam

Cardboard

Bags

High density polyethylene bag

Metalised polyethylene

ISO 11469 Not applicable PP LDPE Not applicable HDPE PE

Recycling Guidance Recyclable Recyclable Recyclable Recyclable Recyclable Recyclable

REACH regulation
Information required by Article 33(1) of Regulation (EC) No. 1907/2006 (“REACH”) relating to products containing substances of very high concern (SVHCs) is available at www.renishaw.com/REACH
WEEE recycling guidelines
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.

VIONiC RKLC20-S linear installation guide

2

Storage and handling

Scale and readhead

N-heptane

Propan-2-ol

CH3(CH2)5CH3

CH3CHOHCH3

Readhead only
Acetone

CH3COCH3

Chlorinated Solvents

Methylated Spirits

Minimum bend radius RKLC20-S ­ 50 mm

Storage
+70 °C -20 °C

Installation
+35 °C +10 °C

Operating
+70 °C 0 °C

Humidity

VIONiC RKLC20-S linear installation guide

NOTE: During storage, ensure self-adhesive tape is on the outside of bend.

95% relative humidity (non-condensing) to IEC 60068278
3

VIONiC readhead installation drawing

Reference mark selector magnet

Optical centreline (incremental and reference mark)
18
29
7.8 7.8

(Yaw tol. ±0.4°) 0.25

Ø4.25 ±0.25

P limit magnet Selected IN-TRAC TM reference mark
Reference mark selector sensor position
6 min R > 30 Dynamic bend radius R > 10 Static bend radius

Set-up LED

Offset 3.75 ±0.5 Q limit magnet

P and Q limit switch sensor position

Forward direction of readhead relative to scale

35 23 11.5

2 off mounting holes M2.5 through, counterbored Ø3 × 2.3 deep both sides. NOTE: The recommended thread engagement is 5 min (7.5 including counterbore) and the recommended tightening torque is between 0.25 and 0.4 Nm.
A (Pitch tol. ±1°) 0.6

4.75

Optical centreline marker

Dimensions and tolerances in mm

(Roll tol. ±0.5°) 0.08

8.75 *

4.25 Mounting faces 13.5

4.15 10

Detail A Scale reading surface Scale thickness 0.15 (including adhesive)
Rideheight: 2.1 ±0.15

*Extent of mounting face. Dimension from substrate surface.

VIONiC RKLC20-S linear installation guide

4

RKLC20-S scale installation drawing

Dimensions and tolerances in mm

START (page 6) 20

Overall length (L + 30) Scale length (L)
Measuring length ML = (L – 40) (ML = (L – 55) with dual limits) Readhead optical detector position at extent of travel

FINISH (page 6)
35 (20 when Q limit
not used)

VIONiC readhead

0.5 0.2 /100

F

F = axis of motion

9.2 A

Reference mark selector magnet (A-9653-0143) (Dimensions as Q limit)

13 30 P limit magnet (A-9653-0138)
(Dimensions as Q limit)
Nominal P limit trigger point
Ra 3.2

P and Q limit switch sensor position

IN-TRAC reference mark RKLC20-S scale

Optical centreline (Incremental and reference mark)

6 Q limit magnet (A-9653-0139)
0.05 F F = axis of motion

10

15

End clamp

(Pair A-9523-4015)

Nominal Q limit trigger point

1.5* Detail A

15 ±1

Optional bolted reference mark selector or limit magnets

22

18

Bolted magnet type

Part number

9.7

Reference mark selector A-9653-0290

Ø2.2

10

1.85

3.7

Q limit

A-9653-0291

P limit

A-9653-0292

3.7

18.5 ±1

*Dimension from substrate. Supplied with 2 × M2 × 4 screws.

NOTES: The reference mark selector and limit actuator locations are correct for the readhead orientation shown. External magnetic fields greater than 6 mT, in the vicinity of the readhead, may cause false activation of the limit and reference sensors.

VIONiC RKLC20-S linear installation guide

5

Scale application
Scale applicator (A-6547-1912) is designed for use with RKLC20-S scale.
1. Allow the scale to acclimatise to the installation environment prior to installation. NOTE: RKLC scale should be installed between +10 °C and +35 °C to ensure scale mastering.
2. Mark out the START’ andFINISH’ points for the scale on the axis substrate ­ ensure that there is room for the end clamps (RKLC20-S scale installation drawing’, page 5). 3\. Thoroughly clean and degrease the substrate using recommended solvents (Storage and handling’, page 3). Allow the substrate to dry before applying scale.
4. Mount the scale applicator to the readhead mounting bracket using M2.5 screws. Place the shim supplied with the readhead between the applicator and substrate to set the nominal height. NOTE: The scale applicator can be mounted either way round to enable easiest orientation for scale installation.
5. Move the axis to the scale `START’ position, leaving enough room for the scale to be inserted through the applicator.

10. Remove the applicator carefully. Apply firm finger pressure via a clean lintfree cloth along the length of the scale after application to ensure complete adhesion.
11. Clean the scale using Renishaw scale wipes (A-9523-4040) or a clean, dry, lint-free cloth.
12. Fit end clamps: see `End clamps’ below.

End clamps
A-9523-4015 is an end clamp kit designed to be used with Renishaw RKLC20-S scale. (Alternative narrow 6 mm wide end clamps (A95234111) are also available.)
NOTE: End clamps can be mounted before or after readhead installation.

1. Clean the ends of the scale and the area where end clamps are to be fitted using Renishaw scale wipes (A-9523-4040) or one of the recommended solvents (`Storage and handling’, page 3).

2. Thoroughly mix up a sachet of glue (A-9531-0342) and apply a small amount to the underside of the end clamp.

START

Splitter screw

M2.5 mounting holes

6. Begin to remove the backing paper from the scale and insert the scale into the applicator up to the START’ point (as shown). Ensure the backing paper is routed under the splitter screw. 7\. Ensure that the end of the scale is in line with theSTART’ position on the axis and apply finger pressure via a clean lint-free cloth to ensure scale end adheres well to the substrate.
Direction of scale application

RKLC20-S Backing tape

3. The end clamp features two small regions of contact adhesive. These will temporarily hold the end clamp in position while the glue cures. Remove the backing tape from either side.

4. Immediately position the end clamp over the end of the scale and push down to ensure complete adhesion. Allow 24 hours at 20 °C for full cure.*

Splitter screw

`START’

Ensure that excess glue is wiped away from the scale as it may affect the

8. Slowly and smoothly move the applicator through the entire axis of travel, ensuring the backing paper is

readhead signal level.

pulled manually from the scale and does not catch under the applicator.

*To ensure scale end movement of typically < 1 m, stabilise the system at least 5 °C higher than the maximum customer

9. During installation ensure the scale is adhered to the substrate using light finger pressure.

application temperature for a minimum of 8 hours. For example: Customer application = 23 °C axis temperature. Stabilise the system at 28 °C for a minimum of 8 hours.

VIONiC RKLC20-S linear installation guide

6

Reference mark selector and limit magnet installation
IMPORTANT: Allow 24 hours after scale application before fitting magnets.
For accuracy and ease of positioning of reference mark selector and limit magnets, the applicator tool (A-9653-0201) should be used. The magnet should be attached to the applicator tool as shown below. Limit magnets can be positioned at any userdefined location along the scale, but the reference mark selector magnet should be positioned adjacent to the selected IN-TRAC reference mark as shown. As the VIONiC readhead passes the reference mark selector magnet or limit switch magnet, a force of up to 0.2 N is generated between the magnet and the concentrators on the readhead. The design of the bracket should be sufficiently stiff so that it is able to tolerate such force without distorting. Following the clamping instructions on the scale installation will prevent this magnetic force from disturbing the scale.

Limit trigger point
The limit output is nominally asserted when the readhead limit switch sensor passes the limit magnet leading edge, but can trigger up to 3 mm before that edge (RKLC20-S scale installation drawing’, page 5). NOTES X Reference and limit magnets may creep when influenced by magnetic materials in close proximity. In such cases, they should be held in place using an additional fillet of epoxy glue or similar along the outer edge of the magnet assembly. Optional bolted reference and limit magnets are available (RKLC20-S scale installation drawing’, page 5). X The reference mark selector and limit actuator locations are correct for the readhead orientation shown. X The reference mark selector magnet is only required for `Customer selectable reference mark’ readheads. For more information refer to VIONiC series encoder system data sheet (Renishaw part no. L-9517-9678). X External magnetic fields greater than 6mT, in the vicinity of the readhead, may cause false activation of the limit and reference sensors.
VIONiC RKLC20-S linear installation guide

P limit magnet

Applicator tool (A-9653-0201)

Remove self-adhesive backing paper

Reference mark selector magnet

Selected IN-TRAC reference mark

Q limit magnet 7

VIONiC encoder system quick-start guide
This section is a quick-start guide to installing a VIONiC encoder system. More detailed information on installing the system is contained on page 9 and page 10 of this installation guide. The optional Advanced Diagnostic Tool ADTi-100* (A-6165-0100) and ADT View software can be used to aid installation and calibration.
INSTALLATION
Ensure scale, readhead optical window and mounting faces are clean and free from obstructions.
If required, ensure reference mark selector magnet is correctly positioned (`RKLC20-S scale installation drawing’, page 5).
Connect the readhead to receiving electronics and powerup. The setup LED on the readhead will flash.
Install and align the readhead to maximise signal strength over the full axis of travel as indicated by a Green flashing LED.
CALIBRATION
Cycle the power to the readhead to initiate the calibration routine. The LED will single flash Blue.
Move the readhead along the scale at slow speed (< 100 mm/s), without passing a reference mark, until the LED starts double flashing Blue.

No reference mark
If a reference mark is not being used, the calibration routine should now be exited by cycling the power. The LED will stop flashing.

Reference mark
Move the readhead back and forth over the selected reference mark until the LED stops flashing.

The system is now calibrated and ready for use. Calibration values, Automatic Gain Control (AGC) and Automatic Offset Control (AOC) status, are stored in readhead non-volatile memory at power down. NOTE: If calibration fails (LED remains single flashing blue), restore factory defaults by obscuring the readhead optical window on powerup (page 11). Repeat the installation and calibration routine.
*For more details refer to the Advanced Diagnostic Tool ADTi-100 and ADT View software quick-start guide (Renishaw part no. M-6195-9321) and Advanced Diagnostic Tool ADTi-100 and ADT View software user guide (Renishaw part no. M-6195-9413). The software can be downloaded for free from www.renishaw.com/adt

VIONiC RKLC20-S linear installation guide

8

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.
Readhead set-up
Ensure that the scale, readhead optical window and mounting face are clean and free from obstructions. NOTE: When cleaning 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 setup procedure. Adjust the readhead to achieve a flashing Green LED along the full axis of travel. The faster the flash rate, the closer it is to optimum setup. The optional Advanced Diagnostic Tool ADTi-100 (A-6195-0100) and ADT View software can be used to optimise signal strength in challenging installations. See www.renishaw.com/adt for more information.
NOTE: When re-installing the readhead factory defaults should be restored (page 11).

Yaw 0° ±0.4°

Readhead set-up LED status

Readhead LED diagnostics

Mode Installation mode
Calibration mode Normal operation
Alarm

LED Green flashing

Status Good setup, maximise flash rate for optimum setup

Orange flashing

Poor setup, adjust readhead to obtain Green flashing LED

Red flashing

Poor setup, adjust readhead to obtain Green flashing LED

Blue single flashing Calibrating incremental signals Blue double flashing Calibrating reference mark

Blue

AGC on, optimum set-up

Green

AGC off, optimum set-up

Red Blank flash 4 red flashes

Poor set-up; signal may be too low for reliable operation Reference mark detected (visible indication at speed < 100 mm/s only)
Low signal, over signal, or overspeed; system in error

Green flashing

Orange Red flashing flashing

Pitch 0° ±1°

Roll 0° ±0.5°

Green spacer Rideheight 2.1 ±0.15 mm

VIONiC RKLC20-S linear installation guide

9

System calibration
NOTE: The functions described below can also be carried out using the optional ADT and ADT View software. See www.renishaw.com/adt for more information.
Ensure signal strength has been optimised along the full axis of travel, the LED will be flashing Green. Cycle the power to the readhead or connect the Remote CAL’ output pin to 0 V for < 3 seconds. The readhead will then single flash Blue to indicate it is in calibration mode as detailed inReadhead mounting and alignment’, page 9. The readhead will only enter calibration mode if the LED is flashing Green.

Step 1 ­ Incremental signal calibration X Move the readhead along the axis at slow speed (< 100 mm/s or less than the readhead maximum speed,
whichever is slowest) ensuring it does not pass a reference mark, until the LED starts doubleflashing indicating the incremental signals are now calibrated and the new settings are stored in the readhead memory. X The system is now ready for reference mark phasing. For systems without a reference mark, cycle the power to the readhead or connect the Remote CAL’ output pin to 0 V for < 3 seconds to exit calibration mode. X If the system does not automatically enter the reference mark phasing stage (LED continues single flashing) the calibration of the incremental signals has failed. After ensuring failure is not due to overspeed (> 100 mm/s or exceeding the readhead maximum speed) exit the calibration routine, restore factory defaults as detailed below, and check the readhead installation and system cleanliness before repeating the calibration routine. Step 2 ­ Reference mark phasing X Move the readhead back and forth over the selected reference mark until the LED stops flashing and remains solid Blue (or Green if AGC is disabled). The reference mark is now phased. X The system automatically exits the calibration routine and is ready for operation. X AGC and AOC are automatically switched on once calibration is complete. To switch off AGC refer to Enabling/disabling AGC’, page 11. X If the LED continues doubleflashing after repeatedly passing the chosen reference mark it is not being
detected.
– Ensure that the correct readhead configuration is being used. Readheads can either output all reference marks or only output a reference mark where a reference selector magnet is fitted depending on the options chosen when ordering.
– Check reference mark selector magnet is fitted in the correct location relative to readhead orientation (RKLC20-S scale installation drawing’, page 5). Calibration routine manual exit X To exit the calibration routine at any stage cycle the power to the readhead or connect theRemote CAL’
output pin to 0 V for < 3 seconds. The LED will then stop flashing.

LED Blue single flashing Blue double flashing Blue (auto-complete)

Settings stored None, restore factory defaults and recalibrate Incremental only Incremental and reference mark

VIONiC RKLC20-S linear installation guide

10

Restoring factory defaults
When re-installing the system, or in the case of continued calibration failure, factory defaults should be restored. NOTE: Restoring factory defaults can also be carried out using the optional ADTi-100 and ADT View software. See www.renishaw.com/adt for more information.
To restore factory defaults: X Switch system off. X Obscure the readhead optical window (using the spacer supplied with the readhead ensuring the cut- out
is NOT under the optical window) or connect the Remote CAL’ output pin to 0 V. X Power the readhead. X Remove the spacer or, if using, the connection from theRemote CAL’ output pin to 0 V. X The LED will start continuously flashing indicating factory defaults have been restored and the readhead
is in installation mode (flashing setup LED). X Repeat Readhead set-up’ procedure on page 9. Enabling/disabling AGC The AGC is automatically enabled once the system has been calibrated (indicated by a Blue LED). AGC can be manually switched off by connecting the Remote CAL’ output pin to 0 V for > 3 seconds < 10 seconds. The LED will then be solid Green. NOTE: AGC can be switched on or off using the optional ADTi-100 and ADT View software. See www.renishaw.com/adt for more information.

VIONiC RKLC20-S linear installation guide

11

Output signals
Digital outputs

Function

Signal

Power
Incremental
Reference mark Limits
Alarm Remote CAL * Shield

5 V

0 V

A

–

B

–

Z

–

P

Q

E

–

CAL

–

Colour
Brown White Red Blue Yellow Green Violet Grey Pink Black Orange Clear Screen

9-way D-type (A)
5 1 2 6 4 8 3 7 9 Case

15-way D-type (D)
7, 8 2, 9 14
6 13 5 12 4 11 10 3 1 Case

15-way D-type alternative pin-out (H) 4, 12 2, 10 1 9 3 11 14 7 8 6 13 5 Case

12-way circular connector (X)
G H M L J K D E A B F C Case

14-way JST (J)
10 1 7 2 11 9 8 12 14 13 3 4 Ferrule

9-way D-type connector (termination code A)

52

16

31

15-way D-type connector (termination code D, H)

52

16

40

12-way in-line circular connector (termination code X)

66

17

14-way JST connector (termination code J) 2.8

17 1

14

5

VIONiC RKLC20-S linear installation guide

• Remote CAL line must be connected for use with ADTi-100. 12-way circular Binder mating socket ­ A-6195-0105. Pack of 5 14-way JST SH mating sockets:
  A-9417-0025 ­ Bottom mount; A-9417-0026 ­ Side mount. Maximum of 20 insertion cycles for JST connector.
  12

Speed

Clocked output option (MHz)
50
40
25

5 µm (D) 12
12
12

1 µm (X) 12
12
12

20

12

12

12

12 10.36

10

12

8.53

08

12

6.91

06

12

5.37

04

12

3.63

01

4.53 0.910

*For a readhead with a 1 m cable.

Maximum speed (m/s)

0.5 µm 0.2 µm 0.1 µm

(Z)

(W)

(Y)

12

7.25 3.63

12

5.80 2.90

9.06 3.63 1.81

8.06 3.22 1.61

5.18 2.07 1.04

4.27 1.71 0.850

3.45 1.38 0.690

2.69 1.07 0.540

1.81 0.450

0.730 0.180

0.360 0.090

50 nm (H) 1.81 1.45
0.906 0.806 0.518 0.427 0.345 0.269 0.181 0.045

40 nm (M) 1.45 1.16
0.725 0.645 0.414 0.341 0.276 0.215 0.145 0.036

25 nm (P)
0.906 0.725 0.453 0.403 0.259 0.213 0.173 0.134 0.091 0.023

20 nm (I)
0.725 0.580 0.363 0.322 0.207 0.171 0.138 0.107 0.073 0.018

10 nm (O)
0.363 0.290 0.181 0.161 0.104 0.085 0.069 0.054 0.036 0.009

5 nm (Q) 0.181 0.145 0.091 0.081 0.052 0.043 0.035 0.027 0.018 0.005

2.5 nm (R)
0.091 0.073 0.045 0.040 0.026 0.021 0.017 0.013 0.009 0.002

Minimum edge separation* (ns)
25.3 31.8 51.2 57.7 90.2 110 136 175 259 1038

VIONiC RKLC20-S linear installation guide

13

Electrical connections
Grounding and shielding

VIONiC readhead

Readhead termination /connector

Customer electronics
5 V
Output signals

0 V Shield

IMPORTANT: The shield should be connected to the machine earth (Field Ground). For JST variants the ferrule should be connected to the machine earth.
Maximum readhead cable length: 3 m
Maximum extension cable length: Dependent on cable type, readhead cable length and clock speed. Contact your local Renishaw representative for more information.
NOTE: The maximum cable length between the readhead and the ADTi100 is 3 m.

Recommended signal termination
0 V

Readhead A B Z+

220 pF

Customer electronics

Cable Z 0 = 120R

120R

A B Z-

220 pF

0 V Standard RS422A line receiver circuitry.
Capacitors recommended for improved noise immunity.

Single ended alarm signal termination (Not available with `A’ cable termination)

Readhead

5 V 4k7

Customer electronics

1k8

100R E-

4k7

100nF

Limit output (Not available with `A’ cable termination)
5 V to 24 V R*
P Q

• Select R so that maximum current does not exceed 10 mA. Alternatively, use a suitable relay or opto-isolator.
  Remote CAL operation
  CAL
  0 V Remote operation of the CAL /AGC is possible via CAL signal.

VIONiC RKLC20-S linear installation guide

14

Output specifications
Digital output signals Form ­ Square wave differential line driver to EIA RS422A (except limits P and Q)

Incremental* 2 channels A and B in quadrature (90° phase shifted)

Signal period P

Resolution S

A B

Reference *
Z

Synchronised pulse Z, duration as resolution. Bi-directionally repeatable.

Limits Open collector output, asynchronous pulse (Not available with `A’ cable termination)
Active high Repeatability < 0.1 mm

Resolution option code
D X Z W Y H M P I O Q R

P (µm)
20 4 2 0.8 0.4 0.2 0.16 0.1 0.08 0.04 0.02 0.01

S (µm)
5 1 0.5 0.2 0.1 0.05 0.04 0.025 0.02 0.01 0.005 0.0025

NOTE: A wide reference mark option, outputting a reference pulse for the duration of the signal period is available.
Contact your local Renishaw representative for more information.

P Q

~ Length of limit actuator

Alarm Line driven (Asynchronous pulse)
(Not available with `A’ cable termination)

E-

Alarm asserted when:

­ Signal amplitude < 20% or > 135%

­ Readhead speed too high for reliable operation

15 ms

or 3-state alarm Differentially transmitted signals forced open circuit for > 15 ms when alarm conditions valid.

• Inverse signals not shown for clarity. Only calibrated reference mark is bi-directionally repeatable.

VIONiC RKLC20-S linear installation guide

15

General specifications

Power supply

5V -5% /+10% Typically 200 mA fully terminated

Temperature (system)

Power from a 5 Vdc supply complying with the requirements for SELV of standard IEC 60950-1 Ripple 200 mVpp maximum @ frequency up to 500 kHz
Storage -20 °C to +70 °C

Installation +10 °C to +35 °C * Operating 0 °C to +70 °C

Humidity (system)

95% relative humidity (non-condensing) to IEC 60068-2-78

Sealing Acceleration (system) Shock (system) Vibration (readhead)
(scale)

IP40 Operating 400 m/s², 3 axes Operating 500 m/s², 11 ms, ½ sine, 3 axes Operating 100 m/s² max @ 55 Hz to 2000 Hz, 3 axes Operating 300 m/s² max @ 55 Hz to 2000 Hz, 3 axes

Mass

Readhead 8.6 g

Cable 26 g/m

Readhead cable

Single-shielded, outside diameter 4.25 ±0.25 mm Flex life > 20 × 106 cycles at 30 mm bend radius

Maximum readhead cable length

UL recognised component 3 m

CAUTION: Renishaw encoder systems have been designed to the relevant EMC standards, but must be correctly integrated to achieve EMC compliance. In particular, attention to shielding arrangements is essential.

• To limit maximum tension in the scale (CTEsubstrate – CTEscale) × (Tuse extreme – Tinstall) 550 m/m where CTEscale = ~ 10.1 m/m/°C. Extension cables available. Contact your local Renishaw representative for further details.

VIONiC RKLC20-S linear installation guide

16

RKLC20-S scale specifications

Form (H × W) Pitch Accuracy (at 20 °C) Linearity Supplied length Material
Mass Coefficient of thermal expansion (at 20 °C)
Installation temperature End fixing

0.15 mm × 6 mm including adhesive
20 µm
±5 µm/m
±2.5 µm/m achievable with two point error correction 20 mm up to 20 m (> 20 m available on request)
Hardened and tempered stainless steel fitted with a selfadhesive backing tape 4.6 g/m Matches that of substrate material when scale ends fixed by epoxy mounted end clamps +10 °C to +35 °C Epoxy mounted end clamps (A95234015) Approved epoxy adhesive (A95310342) Scale end movement typically < 1 m *

Reference mark

Type Selection
Repeatability

Customer selected IN-TRAC reference mark, directly embedded into incremental track. Bi-directional position repeatability
Single reference mark selection by selector magnet (A-9653-0143) customer positioned
L 100 mm Single reference mark at scale centre
L > 100 mm Reference marks at 50 mm spacing (first reference mark 50 mm from scale end)
Unit of resolution repeatability (bi-directional) across full system rated speed and temperature ranges

Limit switches

Type
Trigger point
Mounting Repeatability

Magnetic actuators; with dimple triggers Q limit, without dimple triggers P limit (`RKLC20-S scale installation drawing’, page 5)
The limit output is nominally asserted when the readhead limit switch sensor passes the limit magnet leading edge, but can trigger up to 3 mm before that edge
Customer placed at desired locations < 0.1 mm

• The scale and end clamps must be installed following the installation process, see page 6.

VIONiC RKLC20-S linear installation guide

17

Renishaw plc
New Mills, Wotton-under-Edge Gloucestershire, GL12 8JR United Kingdom

T +44 (0) 1453 524524 F +44 (0) 1453 524901 E uk@renishaw.com
www.renishaw.com

For worldwide contact details, please visit www.renishaw.com/contact
Renishaw plc. Registered in England and Wales. Company no: 1106260. Registered office: New Mills, WottonunderEdge, Gloucestershire, GL12 8JR, UK.

M-6195-9477-01
Part no.: M-6195-9477-01-E Issued: 05.2021

References

• Renishaw: enhancing efficiency in manufacturing and healthcare
• Advanced Diagnostic Tools (ADTs)
• Product compliance
• Product Environmental Compliance
• VIONiCâ„¢ incremental encoder downloads

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