PNEUMATIC POSITIONER

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PNEUMATICPOSITIONER
PQ SYSTEMS LTD ROYAL CYLINDERS
CHRIS BARTLETT
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WHY USE IT ?

• Only distance to move is required
• Time saving
• Air consumed reduced (up to 95)
• Movement is controlled , less shock
• Less maintenance
• Improved throughput of material
• Less damage to material with pressue control
• Overall result is a real FINANCIAL SAVINGS

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COMPONENTS
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APPLICATIONS

• Some but not limited to
• Board and Gang Edgers
• Spike Rolls
• Cant Rolls (infeed/outfeed)
• Cant Side Edger Rolls
• Pickers
• Resaw Rolls
• VDAs

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Vertical Roll
Valve Assembly
8 inch Bore cylinder
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8 inch Cylinder 1000 lb Roll Assembly
Moving Roll
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Full 2 Control Card Panel
Card Power
Valve Drive
Probe
PLC Analog in
24vdc supply
15 vdc supply
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Valve Assembly
Valve
Mill Pressure in ( 135 psi max )
Ports to Cylinder
Pilot Filter
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FORCE MODE
THE SYSTEM CAN GO BETWEEN POSITION MODE and
FORCE MODE ON THE FLY Eg Rolls are positioned in
advance and once contact is made with the
material , the Roll/cylinder can be put into
Force mode. The pressure applied by the Roll /
Cylinder is set in the software.
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Force Mode Analog Signal

• Retract Extend
• 0.0 10.0
• 0.25 9.75
• 0.50 9.50
• 10.0 0.0
• Where retract and extend refer to the 0V
  definition and values are in volts

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TYPICAL MOVEMENT

• PLC Program Sequence Example
• 4vdc preposition
• 2vdc position
• 9.65vdc force mode
• 5vdc next preposition

NEXT POSITION
5vdc
4vdc
PREPOSITION
2vdc
DROP ONTO BOARD THEN FORCE MODE
9.65vdc
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VALVE 1 2
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VALVE 1 2
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Valve Bias
Annulus Pressure
Full Bore Pressure
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SETUP
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Diagnostics Graph