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LEGACY SERIES EL/AZ
MEDIUM DUTY
>
EL/AZ Positioners – Medium Duty
AL- 4271-1 • AL- 4272-1 • AL- 4273-1 • AL- 4274-1 • AL- 4275-1 • AL- 4275-1SP
AL-4272-1
Our Legacy Series EL/AZ positioners provide accurate
rotation, velocity, and direction for customers involved
in antenna design and development.
➊ APPLICATIONS
• General Purpose Positioning
Subsystems
• Far-Field & Near-Field Antenna
Measurements
• Indoor & Outdoor Use
➋ PRODUCT HIGHTLIGHTS
• Broad Selection – 6 Models
• Vertical Loads Ranging from
1,000 to 10,000 lbs (450 to 4,540 kg)
• Platform Sizes Ranging from
12.6 x 13.3 in to 28 x 28 in
(320 x 339 mm to 711 x 711 mm)
• Excellent Angular Position Accuracy
• Low Backlash Design
• Precision Bearings
• Closed Loop Servo Control
• Industry-Standard Wiring
• Tachometers for Optimum Speed
Regulation & Control
• Wide Operating Temperature Range:
- 4° F to 140° F (- 20° C to 60° C)
• Fully Enclosed Design of Drive Gear
Train & Data Take-Off
• Wide Variety of Available Options
> Rotary Positioners
Their rugged yet simple construction ensures maximum
reliability and trouble-free operation, yielding the best
size and weight versus performance ratio.
Typically, the primary components include the body, precise slew bearings, DC motors, gear reducers,
synchro assemblies, and limit switch assemblies. The turntable surface is designed with a threaded
mounting hole pattern for customer use. A Safe/Operate switch is included to ensure the safety
of working personnel.
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Specifi cations - Legacy Series EL/AZ Positioners Medium Duty
Parameter Units
AL- 4271-1 AL- 4272-1 AL- 4273-1 AL- 4274-1 AL- 4275-1 AL- 4275-1SP
Outline Dimension Drawing Number
Technical Notes
Operational
10-0445 09-1220 10-1936 10-1822 10-1823 19-6292
1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3
Positioner Model
Bending Moment
Vertical Load
Azimuth
Delivered Torque
Elevation
Azimuth
Withstand Torque
Elevation
Drive Power
Nominal Speed
Standard Angle
Transducer Format
Standard
Accuracy
Maximum
Backlash
Elevation Limit-to-Limit Travel
Lower Azimuth Moment Bearing
Capacity (static)
Azimuth
Elevation
Azimuth
Elevation
Azimuth
Elevation
Azimuth
Elevation
ft-lbs 600 2,000 4,200 7,500 12,000 12,000
kg-m 80 280 580 1,040 1,660 1,660
lbs 1,000 1,250 3,000 5,000 10,000 10,000
kg 450 570 1,360 2,270 4,540 4,540
ft-lbs 500 500 1,200 1,200 2,800 10,000
kg-m 70 70 170 170 390 1,380
ft-lbs 500 1,200 2,800 5,000 10,000 10,000
kg-m 70 170 390 690 1,380 1,380
ft-lbs 600 600 2,000 2,000 4,200 12,000
kg-m 80 80 280 280 580 1,660
ft-lbs 600 2,000 4,200 7,500 12,000 12,000
kg-m 80 280 580 1,040 1,660 1,660
hp 1/3 3/4 3/4 3/4 3/4 3/4
hp 1/3 1/3 3/4 3/4 3/4 3/4
rpm 1.5 1.3 1.3 1.3 0.5 0.9
deg/min 540 470 180 110 55 54
deg ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03
deg ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03
deg 0.05 0.05 0.05 0.05 0.05 0.05
deg 0.05 0.05 0.05 0.05 0.05 0.05
deg ± 95 ± 95 ± 95 ± 95 ± 95 ± 95
ft-lbs 3,000 10,000 22,000 22,000 35,000 35,000
kg-m 415 1,380 3,040 3,040 4,840 4,840
Dual Speed
Synchro
Dual Speed
Synchro
Dual Speed
Synchro
Dual Speed
Synchro
Dual Speed
Synchro
Dual Speed
Synchro
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Physical
Height at 0° Elevation
Weight
Platform Size
Environmental
Operating Temperature
in 39.4 40.7 46.5 46.9 49.8 53.8
mm 1,000 1,033 1,182 1,190 1,264 1,367
lbs 510 630 950 1,150 1,350 1,430
kg 231 286 431 522 612 649
in 12.6 x 13.3 24 x 24 24 x 24 28 x 28 28 x 28 28 x 28
mm 320 x 339 610 x 610 610 x 610 711 x 711 711 x 711 711 x 711
- 4° F to 140° F (- 20° C to 60° C)
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Options*
Positioner Model
Parameter Units
AL- 4271-1 AL- 4272-1 AL- 4273-1 AL- 4274-1 AL- 4275-1 AL- 4275-1SP
Incremental Encoder
EN001
EN002
EN003
EN004
SR Slip Ring
RJ Rotary Joint
TH
EX Internal Harnessing
CF Connector Format
LS Leveling Screw (set)
ST Stow Lock
MM Mounting Thread
IC Interlock Circuit
*See Options Glossary on page 132 (-) N/A Opt Optional
(Standard Accuracy)
Accuracy – Azimuth
Accuracy – Elevation
Direct Incremental Encoder
(High Accuracy)
Accuracy – Azimuth
Accuracy – Elevation
Direct Absolute Encoder
(High Accuracy)
Accuracy – Azimuth
Accuracy – Elevation
Absolute Encoder
(Standard Accuracy)
Accuracy – Azimuth
Accuracy – Elevation
3
Central Thru-Hole Inner
Diameter
Opt Opt Opt Opt Opt Opt
deg ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03
deg ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03
Opt Opt Opt Opt Opt Opt
deg ± 0.005 ± 0.005 ± 0.005 ± 0.005 ± 0.005 ± 0.005
deg ± 0.005 ± 0.005 ± 0.005 ± 0.005 ± 0.005 ± 0.005
Opt Opt Opt Opt Opt Opt
deg ± 0.005 ± 0.005 ± 0.005 ± 0.005 ± 0.005 ± 0.005
deg ± 0.005 ± 0.005 ± 0.005 ± 0.005 ± 0.005 ± 0.005
Opt Opt Opt Opt Opt Opt
deg ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03
deg ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03 ± 0.03
SR051L
SR101L
-----in -----mm ----- EX002 EX002 EX002 EX002 EX002 EX002
------
SR201L
SR301L
SR402L
RJ12U
RJ18U
RJ26U
RJ40U
RJ50U
Built-In Built-In LS001-3 LS001-3 LS001-6 LS001-6
-----MM002
MM003
IC001 IC001 IC001 IC001 IC001 IC001
SR051L
SR101L
SR201L
SR301L
SR402L
RJ12U
RJ18U
RJ26U
RJ40U
RJ50U
MM002
MM003
SR051L
SR101L
SR201L
SR301L
SR402L
RJ12U
RJ18U
RJ26U
RJ40U
RJ50U
MM002
MM003
SR051L
SR101L
SR201L
SR301L
SR402L
RJ12U
RJ18U
RJ26U
RJ40U
RJ50U
MM002
MM003
SR051L
SR101L
SR201L
SR301L
SR402L
SR502L
RJ12U
RJ18U
RJ26U
RJ40U
RJ50U
MM002
MM003
SR051L
SR101L
SR201L
SR301L
SR402L
SR502L
RJ12U
RJ18U
RJ26U
RJ40U
RJ50U
MM002
MM003
> Rotary Positioners
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❚ AL- 4275-1
supplied accessories
>
CD-ROM Documentation Set:
User Manual (Installation, Setup, Operation & Maintenance)
technical notes
1 All accuracy data is based on no-load conditions.
Contact ORBIT/FR for accuracy under load conditions.
2 All models are equipped with adjustable limit switches
capable of approx 20° to 900° total travel. When rotary
joint and slip ring options are specifi ed, limit switches
remain but are electrically disabled.
Multi-axis positioners are factory-set at:
• Elevation Axis: 190° (± 95°)
• Azimuth Axis: 400° (± 200°)
3 Slip Ring Option Notes:
• Certain slip ring options may require an extension
cap that protrudes above the turntable surface.
Positioner height may increase. Consult ORBIT/FR.
• Slip ring contacts for customer use are provided
with dedicated connectors.
ORDERING INFORMATION
• Refer to Legacy Series EL/AZ Positioners
– Medium Duty Specifi cation Table
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