Page 1
Compact Encoder Tape
for MTE Series Encoders
Installation Manual
and Reference Guide
MicroE Systems • 125 Middlesex Turnpike • Bedford, MA 01730 • USA
www.microesys.com info@microesys.com T. 781-266-5700
(CET™) Scale Installation
MTE-IM CET Scale Installation Rev A1
© 2015 MicroE Systems
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Table of Contents
Compact Encoder Tape (CET™) Scale Installation
Introduction
Introduction (Precautions, Patents, Manual Revisions) ............................................................................3
Overview ....................................................................................................................................................4
Items Required for Scale Installation ........................................................................................................4
Pre-Installation Information and Precautions ............................................................................................5
Design Guidelines for Top Mount and Side Mount Configurations............................................................6
Mounting Surface Preparation for Top Mount and Side Mount Sensors ..................................................7
Cutting CET Scales ..................................................................................................................................8
Tape Scale, Lengths <1000mm
By Hand, for MTE Top Mount and MTE Side Mount ................................................................................9
Tape Scale, Lengths >1000mm
By Applicator Tool, for MTE Top Mount ..................................................................................................13
By Applicator Tool, for MTE Side Mount..................................................................................................19
End Cap Installation
End Cap Installation ................................................................................................................................25
Final Clean, Inspection, Cure Time, and Rework ..............................................................26
Contacting MicroE Systems ..............................................................................................................27
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Precautions
Follow standard ESD precautions. Turn power off before connecting the sensor. Do
not touch the electrical pins without static protection such as a grounded wrist strap.
Do not touch the scale unless you are wearing talc-free gloves or finger cots. Please
read this installation manual for full instructions.
1
2
MTE models are CE and RoHS compliant.
Manual Version Numbers
MTE-IM CET Scale Installation Rev A, issued February 2014
Changes: N/A
Related Documents
-MTE Data Sheet
-MTE Sensor Installation Manual
-MTE Interface Drawing
RoHS
Page 4
Overview
This manual applies to the installation of the following scale types.
• PurePrecision Compact Encoder Tape (CET™) for MTE Series, Model CET20-
Items Required for CET Scale Installation
You will need the following items available:
• Shears (recommend, Clauss, Item# 18003)
• Tape Applicator Tool, for applications >1000mm (not required for installations <1000mm)
MTE Top Mount Configuration tool Model Number: TSAT-CET
MTE Side Mount Configuration tool Model Number: TSAT-SM-PPT
• Finger Cots or talc-free gloves
• Acetone or isopropyl alcohol
• Lint-free cotton cloths or wipes
• End caps (optional)
• Two-part epoxy (Tra-Con Tra-Bond 2116)
• Stick and disposable surface for stirring epoxy
Refer to encoder model data sheets for detailed ordering guide and more information
about MicroE Part Numbers.
Page 5
Pre-Installation Information and Precautions
Read all instructions completely before beginning the
installation process.
The CET™ Scale is a precision metrological device. Handle it with the
utmost care at all times.
Avoid bending the tape scale to a radius less than 90mm (3.5
inches)
Avoid twisting the CET Scale.
Do not let any sharp object touch the tape scale after the blue
protective film is removed.
The CET Scale is protected by a blue film on the top that
prevents contamination and damage to the grating pattern
during installation.
Once the adhesive on the tape scale is exposed (by removing
the adhesive liner), do not touch the adhesive or allow any
contamination to come into contact with it.
CET Scale is designed for one time installation only.
If removed from the mounting surface for any reason, it should
not be used for any kind of reapplication. This will affect the
performance and reliability of the encoder system.
Minimum
storage radius
90mm (3.5 inches)
The adhesive on the CET Scale is permanent.
Do not touch the adhesive once the adhesive liner is removed.
Do not remove the tape scale from the mounting surface once it has been installed.
Do not reinstall the tape scale if it has already been installed once.
Avoid any contamination to the adhesive. Any particulate matter or other contamination that
is trapped between the scale and the mounting surface will affect encoder performance.
NOTE:
MicroE does not recommend installing CET Scale on a curved
(cylindrical) surface.
Page 6
Design Guidelines
1.
Verify the tolerances of the scale's mounting
surface given in the Interface Drawing.
2.
Verify the dimensions of the scale benching
edge (groove or straight edge) given in the
Interface Drawing.
3.
Calculate the length of CET™ Scale required for
your application. Refer to the Interface Drawing.
4.
Tape scales less than 1000mm can be installed by
hand against a straight edge. For lengths greater
than 1000mm, tape scale applicator tools are
needed:
Top Mount Configuration:
Applicator tool Model Number: TSAT-CET
Side Mount Configuration:
Applicator tool Model Number: TSAT-SM-PPT
5.
If the tape scale is being installed into a 6mm
grove, it must be installed by hand (regardless of
scale length). Refer to the Interface Drawing.
6.
If machining the mounting surface is undesirable,
or not possible, a temporary straight edge can be
used that meets the dimensions and tolerances
specified in the Interface Drawing.
Two kinds of temporary straight edge can be
used -
• Type I (thin)-
Temporary Straight Edge of thickness
0.76 ± 0.05 mm (0.030 ± 0.002 inches).
Refer to the Interface Drawing for additional
dimensional requirements. A steel rule may be
one of the options for this type of temporary
straight edge.
• Type II (thick)-
Temporary straight edge with minimum
thickness 9.53mm (0.375 inches). Refer to the
Interface Drawing for additional dimensional
requirements.
NOTE:
See the appropriate section on Tape Applicator Tool
installations.
Page 7
Mounting Surface Preparation
1.
Inspect the mounting surface for any machining irregularities. MicroE Systems recommends a surface finish
of better than 1.6 micrometers Ra.
2.
The straight edge (either permanent or temporary) must be sharp on the benching side in order to use it as a
guide in hand mounted applications. In order for the tape scale to be mounted close to the straight edge, the
maximum radius of 0.127 mm (0.005 inches) should be used where the edge meets the bottom of the
mounting surface.
3.
Thoroughly clean the scale mounting surface and reference edge using a cotton swab or lint-free cloth
dampened with isopropyl alcohol or acetone.
Remove all dust and particles.
4.
Mark the starting location on the mounting surface where the tape scale will be applied.
Page 8
Cutting the CET™ Scale
1.
Uncoil the tape scale and cut it to the
required length using shears.
Note: check the interface drawing to make
sure the scale is cut to the right length.
Securely hold the tape scale close
to the shear (at an approximate
distance of 40mm [1½ inches])
near the point of cutting.
Orient the tape scale
perpendicular to the shear.
Cut the tape scale in a smooth,
continuous motion.
Shear held perpendicular to
the tape scale (NOT INCLINED)
Hand approximately at a
distance of 40mm-50mm
(1 1/2 inches to 2 inches)
from the cutting point
Shear held inclined,
not perpendicular,
to the tape scale
NOTE:
When working with any encoder
scale, it is important to use either
finger Cots or talc-free gloves
Page 9
CET™ Scale, MTE Top/Side Mount Configurations
Installation By Hand
2.
Removing/peeling the bottom
adhesive liner.
CET Scales have 3 layers, blue protective
film, steel scale, and adhesive backing.
Remove/peel back approximately 25mm
(1 inch) of the bottom adhesive liner, taking
care not to touch the adhesive or allow any
particulate contamination.
NOTE:
Do not peel the blue protective
film off at this time.
Adhesive liner peeled off about
25mm (1 inch) from one end
LEFT RIGHT
1.
Scale direction/orientation
Orient the scale such that the "arrowheads" on the blue protective film are pointing towards the mounting
surface reference edge “D” as shown in the interface drawings for your sensor model.
Refer to the correct model number Interface Drawing for reference edge “D” dimensions and sensor
orientation. Download the latest Interface Drawing at www.microesys.com/products/documentation
D
= Mounting Surface Reference Edge
NOTE:
For best system performance, talc-free gloves or finger cots should be worn during all
steps of tape scale installation.
Thoroughly clean the scale mounting surface and reference edge using a cotton swab
or lint-free cloth dampened with isopropyl alcohol or acetone. Remove all dust and
particles.
D
Page 10
CET™ Scale, MTE Top/Side Mount Configurations
Installation By Hand
4.
Place the CET™ Tape Scale against the mounting surface “D” reference edge.
Place the 25mm (1 inch) exposed adhesive end of the tape scale against the mounting surface “D” reference
edge as shown and press firmly on the end.
NOTE:
Adhesive exposed by removing the adhesive bottom liner can touch the mounting
surface only once.
3.
Flip the tape over with the 25mm (1 inch) exposed adhesive surface facing down. Be sure not to touch or
contaminate the exposed adhesive surface. Be sure the orientation arrows on the blue protective film point to
the “D” reference edge.
“D” reference edge as shown in the
MTE interface drawing.
Tape scale orientation arrows.
Page 11
CET™ Scale, MTE Top/Side Mount Configurations
Installation By Hand
5.
Install the CET Scale along the remaining length of the mounting surface.
Press the remaining tape on to the mounting surface with a sliding motion as shown below.
Pull the adhesive liner out of the way during the sliding motion.
NOTE:
Make sure that the tape scale is tight against the “D” reference edge.
Pull adhesive liner out of the way
during sliding motion
Sliding motion of finger along the
length of the tape
NOTE:
Be sure to keep the blue top protective film in place.
“D” reference edge as shown in the
interface drawing.
Page 12
CET™ Scale, MTE Top/Side Mount Configurations
Installation By Hand
6.
Once the scale is applied to the mounting surface, and before the blue protective film is removed, it is
recommended that even pressure be applied over the entire tape scale length by sliding a glove or cot
protected finger across the scale. The applied pressure will ensure that the adhesive is evenly and
permanently set.
7.
Peel off the blue protective film.
Start the peeling process using a sharp tool, being careful not to damage the scale. Pull off the remaining blue
protective film.
NOTE:
After removing the blue
protective film, the scale is
ready for use and will
perform to specification.
The encoder will not
function properly with the
blue protective film
installed. It must be
removed for proper encoder
operation.
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Applicator tool spring loaded contact
cylinder Up/Down position knob
CET scale entry
channel
Spring loaded
contact cylinder
1.
Overview of CET Scale Applicator Tool (Model Number: TSAT-CET)
The CET Scale Applicator Tool
mounts into the MTE’s sensor
mounting holes.
The orientation of the CET Applicator Tool
corresponds to the MTE encoder as shown below.
The benching surfaces correspond to the B and C
faces shown in the MTE interface drawing.
B
B
C
C
2.
Applicator Tool benching faces
Shown below is the MTE Sensor head mounted in
its fixture.
3.
Applicator Tool - mounting
The CET Applicator Tool mounted in the same
MTE Sensor fixture, ready for CET Scale
installation.
CET™ Scale, MTE Top Mount Configuration
Installation By Mounted Applicator Tool
NOTE:
For best system performance, talc-free gloves or finger cots should be worn during all
steps of tape scale installation.
Thoroughly clean the scale mounting surface and reference edge using a cotton swab or
lint-free cloth dampened with isopropyl alcohol or acetone. Remove all dust and particles.
Tool orientation
arrows
Page 14
CET™ Scale, MTE Top Mount Configuration
Installation By Mounted Applicator Tool
The correct end of the tape to insert is shown
below.
5.
Applicator Tool / CET Scale Orientation
Tape Scale orientation arrows
Tool orientation
arrows
Both Tape Scale arrows, and Applicator Tool
orientation arrows need to point in the same
direction, while the tape is being applied.
In the example above, the side of the tape scale
that needs to go into the tool entry channel first
is called the “correct” end.
Tape entry
channel
“Correct” end of tape to
insert into applicator tool.
While mounted in the MTE sensor’s fixture, CET
Scale is fed through the entry channel and pressed
onto the mounting surface with the spring loaded
contact cylinder.
The contact cylinder has two positions, Up and
Down, controlled by the black position knob on the
side of the Applicator Tool.
Up, allows clearance for feeding of the CET Scale
through the entry slot into the “start” position.
Down, locks the tape scale onto the “start” position.
Moving the Applicator Tool along in the Down
position will automatically press the CET Scale to
the mounting surface.
4.
Applicator Tool - bottom view
CET Scale
adhesive surface
CET Scale clear adhesive
backing, unravelling
Spring loaded
contact cylinder
6.
Install the Applicator Tool into the MTE Mount
Tighten the mounting screws.
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CET™ Scale, MTE Top Mount Configuration
Installation By Mounted Applicator Tool
Peel back about 50mm (2 inches) of clear adhesive backer tape.
8.
Tape Scale Insertion
Turn the tool contact cylinder knob to the UP
position.
Insert the “correct” end of the tape scale into the
applicator tool, making sure the clear backing tape
curls out of the way.
The orientation arrows on the Tape Scale and
Applicator Tool need to point in the same direction.
Also note, the “D” reference edge is determined
from the MTE interface drawing. The tape scale
orientation arrows always point to the “D” reference
edge. In the example, the dotted red line shown is
the measured “D” reference edge. When the tape
scale is finally installed, the orientation arrows will
be pointing to the calculated “D” reference edge.
Clear adhesive backer tape peeled
back about 50mm (2 inches).
Tool contact cylinder in
UP position
Tape slides into channel
under the dowel pin.
Tool orientation arrows
7.
Tape Scale Preparation
Using a sharp tool or fingernail, peel off a short
section of bottom adhesive backing, approximately
50mm (2 inches) from the “correct” end of the scale
to be inserted into the applicator tool.
Take care not to touch the adhesive or allow any
particle contamination.
Tape scale orientation arrows
NOTE:
Do not peel the blue
protective film off at
this time.
D
“D” datum edge
from MTE
interface drawing
Page 16
CET™ Scale, MTE Top Mount Configuration
Installation By Mounted Applicator Tool
9.
Tape Scale Insertion
Push the scale slowly into the Applicator Tool until the tape scale emerges from the side of the mounting fixture
to a desired end location. Press down on this exposed 3-5mm section of tape.
10.
Rotate Contact Cylinder Knob to Down
Turn the applicator tool contact cylinder knob to the DOWN position.
Turning the knob to the DOWN position, applies firm pressure to the tape scale under the applicator tool. This
action presses the adhesive side of the tape scale firmly onto the scale mounting surface.
Press down on end of tape.
Tool contact cylinder in DOWN position
Page 17
CET™ Scale, MTE Top Mount Configuration
Installation By Mounted Applicator Tool
11.
Apply the Tape Scale
Push the Applicator Tool and fixture assembly in the direction of tape application. Use a slow and steady motion.
Once the tool begins moving, it automatically separates the clear adhesive backing tape from the scale.
Pull the clear adhesive backing tape out of the way to prevent the backing tape from clogging the applicator tool.
Be sure to pull the
adhesive backing film out
of the way to prevent a
tool jam.
Pull clear adhesive backing
tape out the way as the
Applicator Tool is moved.
Applicator Tool and fixture direction of motion
CET Scale being applied
to mounting surface
Tool contact cylinder knob in the DOWN position
Page 18
CET™ Scale, MTE Top Mount Configuration
Installation By Mounted Applicator Tool
12.
Once the scale is applied to the mounting surface, and before the blue protective film is removed, it is
recommended that even pressure be applied over the entire tape scale length by sliding a glove or cot
protected finger across the scale. The applied pressure will ensure that the adhesive is evenly and
permanently set.
NOTE:
After removing the blue protective film, the scale is ready for use and will perform to
specification.
The encoder will not function properly with the blue protective film installed. It must be
removed for proper encoder operation.
13.
Peel off the blue protective film.
Start the peeling process using a sharp tool, being careful not to damage the scale. Pull off the remaining
blue protective film. Clean the tape scale using alcohol or acetone and a lint-free cotton cloth.
NOTE:
Make sure you have on finger cots
or talc-free gloves.
A
A
B
D
Page 19
CET™ Scale, MTE Side Mount Configuration
Installation By Mounted Applicator Tool
1.
MTE Side Mount Tape Scale Applicator Tool (Model Number: TSAT-SM-PPT)
The mounted application tool is needed for scale lengths greater than 1000mm. It is mounted in the same
fixture as the MTE Side Mount Sensor in the MTE Side Mount Bracket Kit (BK-SM-MTE) or customer
fabricated adaptor.
Tool orientation
arrows
Tool contact cylinder knob
Tape entry
channel
2.
TSAT-SM-PPT Side Mount Applicator Tool orientation to the “B” sensor mounting surface*.
The “B” MTE sensor benching surface is shown in the MTE interface drawing, along with the “D” tape scale
mounting edge. The corresponding “A” reference mounting surface of the Applicator Tool and Bracket Kit
adapter is shown below.
Tape Scale
Applicator Tool
Mounting Surface “A”
Mounting Surface for MTE Sensor/Bracket Kit and Tape Applicator Tool
MTE Side Mount
Bracket Kit,
Model Number:
BK-SM-MTE
*The MTE Side Mount Tape Scale Applicator Tool (model number: TSAT-SM-PPT), will only work
properly when mounted in the configuration shown in Step 2.
NOTE:
For best system performance, talc-free gloves or finger cots should be worn during all
steps of tape scale installation.
Thoroughly clean the scale mounting surface and reference edge using a cotton swab or
lint-free cloth dampened with isopropyl alcohol or acetone. Remove all dust and particles.
8.80±0.20
6.94±0.15
Bracket Kit
Mounting
Surface “A”
MTE Sensor
Page 20
CET™ Scale, MTE Side Mount Configuration
Installation By Mounted Applicator Tool
3.
Mount the Applicator Tool.
Mount the Applicator Tool in the Side Mount Bracket Kit/Sensor mounting holes. Rotate the knob that controls
the contact cylinder plunger to the UP position (See Step 6.). Use the red spacer (1.00mm) Z-height shim to
set up the approximate Z-height, to ensure proper Applicator Tool function.
4.
Note tape scale orientation with arrows and the “D” reference edge.
The applicator tool is shown mounted to the MTE/Bracket Kit Adaptor Sensor mount. Both Tape Scale arrows,
and Applicator Tool orientation arrows need to point in the same direction for proper configuration.
Also note, the “D” reference edge is determined from the MTE interface drawing. The tape scale orientation
arrows always point to the “D” reference edge. In the example below, the dotted red line shown is the
measured “D” reference edge. When the tape scale is finally installed, the orientation arrows will be pointing to
the calculated “D” reference edge.
In the example shown, the left side of the tape scale needs to go into the applicator tool entry channel first.
Tape Scale
orientation arrows
Tool orientation
arrows
D
Page 21
CET™ Scale, MTE Side Mount Configuration
Installation By Mounted Applicator Tool
5.
Peel off a short section of bottom adhesive backing approximately 50mm (2 inches).
Compact Encoder Tape (CET) Scales have 3 layers, blue protective film, steel scale, and adhesive backing.
Using a sharp tool or fingernail, initiate the peeling of the adhesive liner from the end of the tape scale that will
be inserted into the applicator tool entry channel.
6.
Turn Applicator Tool to the “Up” position and insert tape into applicator tool.
Rotate the knob that controls the contact cylinder plunger to the UP position. This allows you to insert the first
section of adhesive exposed tape, into the applicator tool.
Be sure that both the tape scale orientation arrows and the applicator tool arrows point in the same direction.
Tape Scale
orientation arrows
Tool
orientation arrows
Plunger in UP
position
Close-up of plunger knob in the UP
position. The position of the keyways
indicates UP or Down. Rotating the knob
will both move the plunger up or down.
Adhesive backing
liner
NOTE:
Do not peel the blue
protective film off at
this time.
Page 22
CET™ Scale, MTE Side Mount Configuration
Installation By Mounted Applicator Tool
7.
Insert a short section of tape scale into the tool, approximately 50mm (2 inches).
Insert the first short section of tape scale so that it emerges just past the plunger knob to a desired end
location. Press down on this exposed 3-5mm section of tape.
Plunger in the UP position
Press down on this
small section of tape
8.
Rotate the pressure plunger knob to the “Down” position.
Rotate the plunger knob so that the key-way notch is in the position shown.
Plunger knob in the
DOWN position
Close-up of plunger knob in the
DOWN position. Position of notch
indicates that the plunger is in the
DOWN position.
Page 23
CET™ Scale, MTE Side Mount Configuration
Installation By Mounted Applicator Tool
9.
Move the tool in a steady motion to apply the tape scale.
Push the applicator tool in the direction of tape application. Be sure to pull the adhesive backer out of the way
while the applicator is in motion.
Pull adhesive backer away from
tape applicator, while moving the
applicator tool.
Direction of motion of tape
applicator tool.
10.
Once the scale is applied to the mounting surface, and before the blue protective film is removed, it is
recommended that even pressure be applied over the entire tape scale length by sliding a glove or cot
protected finger across the scale. The applied pressure will ensure that the adhesive is evenly and
permanently set.
Page 24
CET™ Scale, MTE Side Mount Configuration
Installation By Mounted Applicator Tool
NOTE:
After removing the blue protective film, the scale is ready for use and will
perform to specification.
The encoder will not function properly with the blue protective film installed.
It must be removed for proper encoder operation.
11.
Peel off the blue protective film.
Start the peeling process using a sharp tool, being careful not to damage the scale. Pull off the remaining
blue protective film. Clean the tape scale using alcohol or acetone and a lint-free cotton cloth.
NOTE:
Make sure you have on finger cots
or talc-free gloves.
Page 25
End Cap Installation for CET™ Scales
Optional
1.
Epoxy Setup
• Mix the two-part epoxy and place it in a
syringe or on the end of a stick. Do not
use a cotton swab to apply the epoxy.
• Put epoxy on the end of the scale. Make
sure that the epoxy touches both the
mounting surface and the scale across
the width of the scale.
Only apply epoxy at the
ends of the tape scale. Do
not get any epoxy on the
tape scale in the
measuring area.
• Perform Step 2, immediately while the
epoxy is still in a liquid state.
2.
Installing the End Caps on the
Mounting Surface
• Remove the adhesive liner from end cap.
• Place the end cap on the top of the scale and
epoxy so that the end of the scale is in the
middle of the end cap.
• Press down lightly to ensure adhesion and
let cure for 24 hours.
Page 26
Final Cleaning, Inspection and Cure Time
Before using the encoder for servo control, clean the tape scale using alcohol or acetone and a lint-free cotton
cloth or swab. Finally, inspect the tape scale's surface for scratches, adhesive spots or smears in the
measuring length.
A cure time of 12 hours is required for the tape scale's pressure sensitive adhesive to achieve the best
performance and reliability.
Reworking to Correct Mistakes
Once installed, the tape scale cannot be moved or removed and reinstalled. Reworking will require removal
and discarding of the old tape and installation of a new one.
Page 27
Contacting MicroE
MicroE Systems is a world leader in optical encoder technology with
offices in major industrial centers around the globe.
To learn more about MicroE Systems products, visit:
www.microesystems.com.
Our products have been used by thousands of companies worldwide to
solve a wide range of motion control applications. Our advanced
encoder technology and application expertise has driven innovations in
the design of machinery, equipment and instrumentation in many
industries, including medical, industrial, robotics, automation, metrology,
semiconductor manufacturing, packaging equipment, entertainment,
energy, military, and scientific research.
MicroE Systems
125 Middlesex Turnpike
Bedford, MA 01730 USA
T 781-266-5700
F 781-266-5112
info@microesys.com
www.microesystems.com
© 2015 MicroE Systems
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