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| The following are some servo control applications that Paw-Taw-John Services, Inc. has done or supplied: |
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Industry: Aerospace System: Sleeve bending machines # Axis: 2 Valve: Servo Description: This special machine made round sleeves used on aircraft. The exact nature of the use for the sleeves was proprietary. Two hydraulic cylinders were used. One pushed a steel ribbon into a round die and the other came down to cut the metal. The position tolerance for both cylinders was .0005”. The gap in the sleeve had a tolerance of .001” to .002”. Industry: Aerospace System: Titanium Presses # Axis: 4 Valve: Servo Description: A press was designed to mold titanium metal for cowlings on jet aircraft engines. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Aerospace System: Aircraft Metal Frame Bending Machine Axis #: 7 Valve: Proportional Description: This system bends and stretches metal beams into ellipses. Using hydraulic servo positioning cylinders, hydraulic pressure switches and Temposonics feedback, rings are made for the fuselages of aircraft. Industry: Power Generation System: Boiler Plate BendersAxis #: 4 Valve: Servo Description: A bending machine required a control system that could track 4-14” bore 24” stroke cylinders. The bender was loaded with welded tube panels 30 ft. wide by 40 to 60 ft. long. The bender had die sets that matched the tube size and spacing for different types of steam panels. The cylinders tracked within .030” of each other. At determined positions, the panels were bent for determined angles. These panels were welded at the construction site in sections to form a boiler grid. The accuracy was very important for alignment and welding of the plates. |
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Industry: Aerospace
System: Work platform lift systems# Axis: 4Valve: ServoDescription: This system used 4-72” stroke hydraulic cylinders attached to the main platform of an incline ramp. The incline ramp could move in a circular motion. The ramp would be positioned next to Boeing 747 cabin doors and then the main platform would be elevated to a cabin door entrance. The cylinders were tracked to keep the platform level. Once in position, the system hydraulics was turned off and workers could proceed up the ramp and into the aircraft. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Metal Manufacturing System: Metal Punch Axis #: 3 Valve: Proportional Description: Steel plates were placed on a moving table. The table had 3 tracking cylinders attached to a platen. It was very important that the table remain level during movement and punch cycle. If the system failed, the hydraulics had to be turned off and controlled to prevent the table from twisting. The table would move down to a set of punch dies. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Plastic Manufacturing System: Plastic rail drill table Axis #: 1 Valve: Proportional Description: System used a 72” stroke hydraulic cylinder with Temposonics. A plastic rail would be mounted on a moving table. The table would move to user defined targets. A drill press would come down on the material and drill a hole. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Power Generation System: Turbine fin pitch controls Axis #: 1 Valve: Servo Description: Moved fins on water turbines to match water flow. Industry: SteelSystem: Steel shear outfeed tablesAxis #: 4 to 8Valve: Proportional Description: In steel rolling plants there is usually a table positioned at the rear of a metal shear. A coil of steel is placed before a set of rolls. The coil is un-reeled through these rolls and straightened before the shear. The table was lifted in the past by jack-screws. The table had a total load capacity of 10,000 lbs. changing the jack-screws to hydraulic servo control cylinders, the lifting capacity changed by a factor of 6. All cylinders had to be tracked so the table would remain level when moving up and down. Tracking tolerances were kept at .020” between all cylinders. Productivity increased 6 fold. Industry: Wood ProductsSystem: Carriage Knee control systems Axis #: 2-4 Valve: Servo or Proportional Description: Primary log breakdown. Independent tracking of knees and positioning of logs to a saw line. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Wood Products System: Carriage Knee control systems with slabbers Axis #: 3-5 Valve: Servo or Proportional Description: Primary log breakdown. Independent tracking of knees and positioning of logs to a saw line. Hydraulic Temposonics feedback servo positioning cylinders used. Slabber used to chip the opening surfaces of logs. Industry: Wood ProductsSystem: Carriage Knee control systems using a line shaft with chain or rack and pinion linkage Axis #: 1 Valve: Proportional or Servo Description: Primary log breakdown. Line shaft controlled with hydraulic motor and proportional valve. Feedback provided by Tempsonics attached to bed plate of one knee. All knees move together in a straight line. Converted rotary motions to linear motion. Industry: Wood Products System: Scrags Axis #: 2 Valve: Servo or Proportional Description: Primary log breakdown. Logs fed to saws based on centerline of machine. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Wood Products System: Maxi-mill carriages Axis #: 4-8 axis Valve: Servo or Proportional Description: Primary log breakdown. Logs fed to saws based on centerline of machine. Industry: Wood Products System: C and D Frame Carriages Axis #:2-8 Valve: Servo or Proportional Description: Primary log breakdown. Logs fed to saws based on centerline of machine. Industry: Wood Products System: McDonough End Dogging Machines Axis #: 2-8 Valve: Servo or Proportional Description: Primary log breakdown. Logs fed to saws based on centerline of machine. Industry: Wood ProductsSystem: Overhead End Dogging Machines Axis #: 3-8 Valve: Servo or Proportional Description: Primary log breakdown. Logs fed to saws and/or slabber configurations based on centerline of machine. Units used log charging carriage that moved logs through a scanner. Saw/slabber sets based on scanned log diameters. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Wood Products System: Horizontal Resaw: Single, Twin, and Triple saw machines Axis #: 1-3 Valve: Servo or Proportional Description: Cut slab boards fed to saws positioned on a horizontal plane. Saw/s are moved up or down. Saw/s could be stationary and the infeed and outfeed tables to the machines were moved. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Wood Products System: Vertical Resaw: Single, Twin with/without tracking linebar, pickers Axis #: 1-6 Valve: Servo or Proportional Description: Cut slabs and/or cants are fed to saws positioned in a vertical plane. Wood is referenced to the left or right of the saws. Saws maybe fixed and a moveable linebar position the wood before the saws. Devices that divert unusable wood called pickers will move with the linebar positions or saws. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Wood Products System: Board Edgers: with/without pickers and/or linebar Axis #: 2-8 Valve: Servo or Proportional Description: Cut slabs are feed to positioned vertical circle saws to cut boards used in housing construction, cut up plants, and furniture manufactures. The boards might be positioned by hand, or linebar. Pickers are used to separate the waste wood from the board. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Wood ProductsSystem: Board Optimizer Axis #: 4-8 Valve: Servo or Proportional Description: Cut slabs are feed through a laser/optical scanner and positioned, fed and cut automatically through a board edger. Pickers are used. Hydraulic Temposonics feedback servo positioning cylinders used. Scanning and positioning are completed with one motion. Industry: Wood Products System: Planer Roll Height System Axis #: 2-3 Valve: Proportional Description: Planer infeed and outfeed rolls using soft rolls are positioned to different thicknesses of boards. The rolls are sequenced as a board is fed through the planer. Using soft rolls decreases manufacturing defects on high priced boards. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Wood Products System: Debarker Ring control Axis #: 4 Valve: Proportional Description: Debarker Ring knives are moved to match the size of an incoming log. As the log is debarked, the ring moves. Due to ring positioning manufacturing defects are decreased and maintenance is reduced. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Wood ProductsSystem: Particleboard Press Outfeed Trays Positioning Axis #: 1 Valve: Proportional Description: Outfeed trays moved to match the position of press plattens. Hydraulic Temposonics feedback servo positioning cylinders used. Industry: Wood Products System: Traveling Horizontal Saw Axis #: 1 Valve: Proportional Description: Horizontal Saw traveled on a track. Log was loaded in a cutting area and the saw would cut boards on a horizontal plane. The system was powered with a diesel generator and was mobile. A Temposonics was used for feedback and a hydraulic motor was used for positioning. Industry: Wood Products System: Saw Quip small log system Axis #: 8-17 Valve: Servo Description: This machine scans small logs and positions chip heads and saws for maximum recovery of useable log fiber. Industry: Wood ProductsSystem: HEWSAW small log system Axis #: 5 Valve: Proportional Description: This machine scans small logs and positions chip heads and saws for maximum recovery of useable log fiber. |
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| POSSIBLE APPLICATION AREAS FOR THE 777SCM | |||||||||||||||||
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Aerospace
Agriculture
Aluminum
Automobile
Entertainment
Food Processing
Machine Tool
Marine
Mining
Steel
Wood Products
Waste to Energy Plants
Any place requiring motion controls. |
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Copyright 2005 Paw Taw John Services, Inc.
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