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THE APPLICATION PROCESSWhat information is critical when specifying an electric
system?
• Load• Maximum Speed• Stroke• Moment Loads• Acceleration/Deceleration
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THE APPLICATION PROCESS
OTHER FACTORS TO CONSIDER
• Actuator position– Vertical– Horizontal
• Carrier position– Top– Bottom– Side
• Available space
• Environment– Contaminants
• Corrosive• Abrasive
– Temperature• Precision
– Accuracy– Repeatability
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Common Automation Applications
• Cutting
• Machining
• Drilling
• Feeding
• Tensioning
• Measuring
• Welding
• Positioning
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LOAD
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LOAD
• Carrying– The total weight to be supported by the actuator alone
• Thrust– The linear force required to move the load or perform the action
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THE APPLICATION PROCESS
Rodless StyleDesigned to move and carry loads
Load Decisions
Rod StyleDesigned to move guided loads
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THE APPLICATION PROCESS
• Rodless Actuators– 1 of 4 load carrying designs
• B3W, SLS, BCS, TKS
Load Decisions
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THE APPLICATION PROCESS
LS Style
TK Style
Load DecisionsB3 Style
B2 Style
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MAX LOAD - RODLESS
200
100
60
434
591
180
1454
300
868
2008
1301
400
200
120
868
1182
360
2908
600
1735
2603
682
1680
2318
0 1000 2000 3000 4000
TKS10
SLS10
BCS10
TKS25
B3S10
BCS15
B3S15
BCS20
TKS50
B3S20
TKS75
Dual 180 Carrier 682 1680 2318Dual Carrier 400 200 120 868 1182 360 2908 600 1735 4016 2603Standard Single Carrier 200 100 60 434 591 180 1454 300 868 2008 1301
TKS10 SLS10 BCS10 TKS25 B3S10 BCS15 B3S15 BCS20 TKS50 B3S20 TKS75
Max L
oad
(lbs.)
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THE APPLICATION PROCESS
Load Decisions• Actuator Thrust
– The linear force required to move the load or perform the action (rod or rodless)
– Applications• Punch or Press Applications• Externally guided applications
– Motor– May need gearhead or reduction to supply
adequate force
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Max T
hrus
t (lb
s.)
300
300
850
850
250
240
0 100 200 300 400 500 600 700 800 900
BCS15
B3S15
B3W15
TKB50
BELT 250 240
BALL 850 850
ACME 300 300
BCS15 B3S15 B3W15 TKB50
Belt vs Screw
THE APPLICATION PROCESS• Max Thrust
– Thrust/Load affects whether a belt or screw drive is selected
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SPEED
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THE APPLICATION PROCESS
Speed Decisions
• Maximum Speed– The maximum rate at which the load is moved (inches per
second)
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THE APPLICATION PROCESS
Speed Decisions• Belt Drive or Screw Drive?
Belt Drive• Max speed 200
inches/sec.
Screw Drive• Max speed varies with
• Screw pitch • Screw length• Nut design
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THE APPLICATION PROCESS
Speed Decisions• Maximum speed and stroke length is limited by screw wobble
(critical speed)– As the stroke length increases the distance between bearing supports increases
causing a “jump rope” effect within the screw
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THE APPLICATION PROCESS
Speed Decisions• Motor
– May exceed maximum RPM limit• Along with desired speed, the screw pitch and any reductions (gearheads or
pulleys) affect the motor RPM.
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STROKE
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THE APPLICATION PROCESS
• Stroke– The maximum distance of travel
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THE APPLICATION PROCESS
• Rodless Style • Rod Style
Stroke Decisions
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THE APPLICATION PROCESS
• Maximum speed and stroke length is limited by screw wobble (critical speed)
– As the stroke length increases the distance between bearing supports increases causing a “jump rope” effect within the screw
Stroke Decisions
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MOMENTLOAD
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THE APPLICATION PROCESS
Moment Load Decisions• Moment Load
– The force the load exerts on the actuator due to • Gravity • Inertia
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Moment Load DecisionsMz - (yaw)
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THE APPLICATION PROCESS
Moment Load DecisionsMx - (roll)
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Moment Load DecisionsMy - (pitch)
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Page 27
ACCEL/DECEL
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THE APPLICATION PROCESS
Accel/Decel Decisions• Acceleration/Deceleration
– The maximum rate at which the actuator reaches its speed
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THE APPLICATION PROCESS
• The Accel/Decel rate impacts moment loads
Dynamic moment load
Accel/Decel Decisions
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• Accuracy– How close you come to the target, though not necessarily
the same position• Repeatability
– How close to the same location, even if not close to the target
• Resolution– Smallest increment of movement
THE APPLICATION PROCESSSystem Precision
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Other factors to consider • Actuator position
– Vertical– Horizontal
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Other factors to consider • Actuator position
– Vertical– Horizontal
• Carrier position– Top– Bottom– Side
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Page 33
THE APPLICATION PROCESS
Other factors to consider
• Actuator position– Vertical– Horizontal
• Carrier position– Top– Bottom– Side
• Available space
• Environment– Contaminants
• Corrosive• Abrasive
– Temperature• Precision
– Accuracy– Repeatability
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Page 34
QUESTIONS??
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