ACU-RITE SENC 50 User Manual
SENC 50
REFERENCE MANUAL
Acu-Rite Companies Inc.
SENC 50 Table of Contents
Page
Introduction / Supplied items ............................................... 2
Key Points / Tolerances ......................................................... 3
Linear Encoder Dimensions.................................................. 4
Spar Dimensions .................................................................... 5
Mounting Requirements........................................................ 6
Typical Mounting ................................................................... 7
Encoder Installation Procedure ............................................ 8
Page
Checking the Installation.................................................... 10
Electrical Shielding.............................................................. 11
Troubleshooting ................................................................... 12
Mechanical Specifications ................................................... 13
Output Signals and Pin-Outs.............................................. 14
Electrical Specifications ...................................................... 15
The Acu-Rite Companies Inc.
Hassle Free Warranty & Service ........................................ 16
Spar
Front mount
bracket
Bottom mount
bracket
Adjustable front or
rear mount
Front mount
bracket
Base mount
• Installation brackets and kits are available.
• Your Authorized Distributor can assist you in selecting
brackets and tools for your installation.
1 Acu-Rite Companies Inc.
Introduction / Supplied Items SENC 50
The SENC 50 Precision Glass Scale Linear Encoder provides
the accuracy and reliability of an Acu-Rite Companies Inc.
measuring system in a very small cross-section with digital
output (analog output available). Features and options include:
• Resolutions of 0.5, 1.0 or 5µm.
• Accuracy grades of ± 3 or ± 5 µm / 1000mm.
• Position Trac or 50mm interval Reference Mark.
• Vinyl or Armor cables of 5, 13, & 19 ft. lengths.
• Mounting fasteners, center supports, and backup spar.
• Installation tools, brackets, and accessories.
The SENC 50 is especially useful for applications with limited
space such as X/Y stages and compact metrology equipment.
Contact your Authorized Distributor for assistance with selection
of product options and accessories.
Shipping carton
contents
A
C
For future ordering information or warranty service, record the
linear encoder catalog and serial numbers.
Catalog # Serial # Manufacture Code #
Axis # 1: _____________________________________
Axis # 2: _____________________________________
Axis # 3: _____________________________________
Axis # 4: _____________________________________
Date of Purchase _____________________________________
Distributor: _____________________________________
Address: _____________________________________
Telephone: _____________________________________
B
A) SENC 50 linear encoder
B) Reference Manual
C) Encoder and Cable
Mounting Hardware
Acu-Rite Companies Inc. 2
SENC 50 Key Points / Tolerances
Use this information to plan your Linear Encoder installation.
// .005 A
// .005 B
• Understand your mounting requirements.
• Follow kit instructions when using an Acu-Rite Companies
Inc. bracket kit.
• Mount encoders close to ways to insure system accuracy.
• Mount with lip seals down and away from the work area.
• Brackets should be short and rigid.
• Surfaces must be in good condition, clean and free of
dirt and paint.
• Do not remove shipping brackets until instructed.
• Shipping bracket spacers can be used to insure .059” gap.
-A- = Machine travel
Center support surface
Reading head
assembly
Equal
required
// .005 A
Equal
Gap
.059 ±.005”
[1.50]
Scale assembly
// .005 A
// .005 A
B
• Mount from either side to obtain desired cable exit direction.
• Tolerances of .005” TIR apply to all mounting dimensions.
• Center support surface required for all measuring
lengths when not using a back up spar.
1.00
Shipping bracket removal clearance
Slide brackets away
from the reading head
1.00
Total head travel
.26 [6.6]
Min.
Measuring length + 1”
[25.4] over travel
.037 [.9]
Min.
• Limit equipment travel to less than measuring length.• Allow clearance for shipping bracket removal.
3 Acu-Rite Companies Inc.
Linear Encoder Dimensions SENC 50
.280
[7.11]
Typ.
End cap
.140
[3.55]
.175 [4.57]
.295
[7.50]
Typ.
Reading
head
assembly
.463
[11.76]
.213
[5.41]
Typ.
M3 x .25 [6.31]
deep min.
Measuring length + 4.65 [118]
Measuring length + 4.09 [103.9]
Scale assembly
for M4
Hex nut
Scale case
Mounting hole
Strain relief
1.85
[47.00]
2.775
[70.50]
[4.00] min.
2.350
[59.69]
[3.81]
.138
[3.50]
and cable
Ø .160
.150
.335
[8.51]
Ø .30
[7.6]
Armor
2.0 [50] Approx.
min bend radius
of armor
.280
[7.11]
.159
[4.04] Typ.
Ø .16
[4.1]
Vinyl
.670
[17.00]
1.182
[30.00]
Align both
surfaces
.02
[0.5]
1.352 [34.34]
.652
[16.56]
.482
[12.25]
.Gap
.059 ± .005
[1.50]
.170
[4.32]
.840
[21.34]
Spar
.170
[4.32]
Acu-Rite Companies Inc. 4
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