2-1/2" x 5-1/2" x 7-3/4" BHS TORIN 2/4-HI HOT REVERSING ROLLING MILL (6334) EQUIPPED WITH HYDRAULIC SCREWDOWNS AND MASS FLOW AUTOMATIC GAGE CONTROL

SPECIFICATIONS

MANUFACTURER: BHS TORIN

TYPE MILL: 2/4 HIGH REVERSING ROLLING MILL
W/HYDRAULIC SCREWDOWNS AND MASS FLOW AUTOMATIC
GAGE CONTROL

ROLL CONFIGURATION 2 HI/4 HI BACK UP ROLL DRIVEN

WORK ROLL SIZE: 2-1/2" x 8" (7-3/4") (63.5mm x 196.5mm)
BACK UP ROLL SIZE: 5-1/2" x 8" (7-3/4") (139.7mm x 196.85mm)

BACK UP ROLLS ARE INTERNALLY HEATED.

ROLL CHOCK ASSEMBLIES ARE WATER COOLED TO KEEP BEARING ASSEMBLIES COOL.

MILL HOUSING CROSS SECTION 5-9/16" X 5-1/2"
MILL HOUSING WINDOW 6-1/2" X 28"

SCREWDOWNS TYPE: HYDRAULIC CYLINDER EQUIPPED WITH SONY MAGNASCALE
INCREMENTAL POSITION FEEDBACK ENCODERS FOR CLOSED
LOOP POSITION CONTROL AND TEMPOSONIC ABSOLUTE
POSITION TRANSDUCERS FOR ANTI-TILT PROTECTION.

DRIVE SPINDLE TYPE: SPLINE
GEARBOX/PINION STAND:
-MANUFACTURER DO JAMES
-SIZE SA92-8PR
-HP RATING 20 HP
-RATIO 21.217 TO 1
SERVICE FACTOR 1.5

MILL DRIVE MOTOR: 20 HP EMERSON ELECTRIC DC, 650/1750 RPM
-MANUFACTURER EMERSON ELECTRIC
-HP 20
-TYPE DC, 650/1750 RPM
240 ARM VOLTAGE, 70 ARM AMPS
-MOTOR IS EQUIPPED WITH A BLOWER AND A GE TACH GENERATOR

MILL SPEED O/44/119 FPM

TYPE: TENSIOMETER CONTROLLED, CONSTANT TENSION
REVERSING WITH AUTOMATIC DRAFT AND DIAMETER
COMPENSATION COORDINATED WITH THE MILL DRIVE
TO ALLOW FOR PRECISE SPEED CONTROL WITH TENSION
ERROR TRIM.

WINDER DIAMETER 8"

WINDER ASSEMBLIES PROVIDE MOUNTING FOR AND ARE COMPLETE WITH DIGITIZER UNITS
FOR INCOMING AND EXITING MATERIAL SPEED REFERENCE AND BRIDLE ROLL UNITS. ALSO
PROVIDED FOR ARE THE MOUNTINGS FOR THE (2) VOLLMER CONTACT GAGES.

THE MILL IS COMPLETE WITH A COORDINATED DC DRIVE SYSTEM. ITS CONFIGURATION IS
THAT OF A TENSIOMETER CONTROLLED, CONSTANT TENSION, REVERSING SYSTEM.

IT UTILIZES A PROGRAMMABLE CONTROLLER (PLC) TO GENERATE SPEED REFERENCES FOR
THE MILL AND WINDERS BASED ON THE SETTING OF THE MILL SPEED POTENTIOMETER,
WHICH IT CONSIDERS A MAXIMUM SPEED PRESET, THE VOLLMER GAGES, THE SOURCE OF
THE DRAFT OR REDUCTION RATION AND THE CALCULATED DIAMETER OF THE MATERIAL
BUILDUP ON EACH WINDER BLOCK.

THE AUTOMATIC GAGE CONTROL SYSTEM PROVIDED IS A COMPUTERIZED ANTICIPATORY MASS
FLOW SYSTEM UTILIZING THE INTEL SBX-386 SBC WHICH IS A REAL TIME PROCESS
CONTROL COMPUTER AND INTEL'S REAL TIME MULTI-TASKING OPERATING SYSTEM, RMX286,
FOR THE EXECUTION OF MULTIPLE TASKS ON A PRIORITY INTERRUPT BASIS.

THE APPLICATION IS WRITTEN IN PLM286, A HIGH LEVEL LANGUAGE, DEVELOPED BY
INTEL AND OPTIMIZED FOR PROCESS CONTROL APPLICATIONS.

THE ANTICIPATORY NATURE OF THE AGC SYSTEM CALCULATES PRECISELY HOW FAR AND
WHEN THE HYDRAULIC SCREWDOWN MUST MOVE TO ACHIEVE THE DESIRED OUTPUT GAGE. THE
SYSTEM ACCOMPLISHES THIS TASK BY GATHERING DATA FROM ENTRY AND EXIT STRIP
THICKNESSES (VOLLMER GAGE FEEDBACK), STRIP DRIVEN ENCODERS (DIGITIZERS),
OPERATOR ENTERED DATA AND IT CALCULATES THE NECESSARY ROLL POSITION CORRECTION
BASED ON THIS INFORMATION. THESE CALCULATIONS ARE PERFORMED ARE EVERY 1 INCH
OF STRIP TRAVEL.
THE CORRECTION IS FED TO THE POSITION CONTROL BOARD AND THAT SYSTEM, IN
CONJUNCTION WITH THE GAGE CONTROL COMPUTER, FEEDS THE INFORMATION TO THE
CLOSED ROLL POSITION SYSTEM.

THE ROLL POSITION SYSTEM USES A CLOSED LOOP TWO AXIS, HIGH PERFORMANCE, MOTION
CONTROL CARD TO;

1. MAINTAIN CONSTANT POSITION WITHOUT OPERATOR OR GAGE CONTROL COMPUTER
INTERVENTION.

2. ACCEPT POSITION COMMANDS INITIATED BY THE OPERATOR THROUGH THE FOUR
POSITION JOYSTICK, AND FAST BUTTON.

3. ACCEPT POSITION COMMANDS OVER THE MULTI-BUS FROM THE GAGE CONTROL
COMPUTER.

IF THE INTEL COMPUTER FAILS TO OPERATE, THIS MOTION CONTROL CARD WILL CONTINUE
TO MAINTAIN POSITION AND THE MILL CAN BE MANUALLY OPERATED BY THE OPERATOR
MOVING THE JOYSTICK.

THE MOTION CONTROL CARD RECEIVES INFORMATION FROM THE MAGNASCALE. THIS
DIGITAL INFORMATION IS PROCESSED AND IF ANY POSITION ERROR IS DETECTED IT WILL
BE REMOVED BY SUPPLYING THE SERVO VALVE WITH AN OPPOSITE CURRENT. THIS PROCESS
IS UPDATED AT A RATE OF 1000 TIMES PER SECOND. THE ROLL POSITION SYSTEM IS
DESIGNED TO PROVIDE RESPONSE TIMES OF TYPICALLY .01 SECONDS FOR A .001"
MOVEMENT.

THE GAGE CONTROL SYSTEM CAN OPERATE IN TWO BASIC MODES OF AUTOMATIC GAGE
CONTROL. THEY ARE;

1. FEEDBACK MODE: ONLY THE EXIT THICKNESS (VOLLMER) GAGE AND STRIP DRIVEN
ENCODERS (DIGITIZERS) ARE USED. THIS MODE IS USEFUL FOR REMOVING LONG TERM
THICKNESS VARIATIONS FROM THE STRIP. THIS MODE IS PROVIDED FOR USE WITH IN
ONE MILL DIRECTION WITH THE MATERIAL BEING PAYED OFF FROM AN EXTERNAL DRAG
PAYOFF.

2. MASS FLOW AGC MODE: THIS MODE OF OPERATION USES BOTH THICKNESS (VOLLMER)
GAGES, AND BOTH STRIP DRIVEN ENCODERS (DIGITIZERS). THE MASS FLOW MODE
TYPE OF OPERATION CANNOT BE SURPASSED FOR REMOVING LARGE FLUCTUATIONS IS
STRIP THICKNESS IN JUST ONE OR TWO PASSES.

THE FOLLOW ING MULITBUS CARDS ARE USED IN THE SYSTEM;

1. INTEL SBC 386/21 CPU
-FEATURES;
1. INTEL 80336 32 BIT MICROPROCESSOR RUNNING AT 16 MHZ
2. ON BOARD ONE MEGABYTE OF DYNAMIC RAM
3. HIGH SPEED 80387 FLOATING POINT MATH PROCESSOR
4. ONE RS232 COMMUNICATIONS PORT
5. ONE ISBX INTERFACE FOR ADDED EXPANSION
6. 16 LEVELS OF DIRECT VECTORED INTERRUPT
7. 64 KILOBYTES 0 WAIT-STATE CACHE MEMORY

2. INTEL DISK CONTROLLERS SUBSYSTEMS
-FEATURES;
1. BASED ON THE 80186 16 BIT MICROPROCESSOR
2. CONTROLS UP TO TWO HARD DISK DRIVES
3. CONTROLS UP TO 4 FLOPPY DISK DRIVES
4. ON BOARD DIAGNOSTICS AND HARD DISK ECC (ERROR CORRECTION)
5. INCORPORATES TRACK CACHING TO REDUCE HARD DISK ACCESS TIMES

3. POSITION CONTROL CARD
-FEATURES;
1. 1 AXIS PROGRAMMABLE MOTION CONTROLLER
2. CONTROLS POSITION, OR VELOCITY OF CYLINDERS
3. HIGH SPEED COMMUNICATION OVER MULTIBUS
4. COORDINATED MOTION OF CYLINDERS
5. PROGRAMMABLE ACCELERATION AND SLEW RATES
6. FRICTIONAL BIAS, FEED FORWARD AND TORQUE LIMIT COMMANDS
7. STAND ALONE ROLL POSITION CONTROL

4. HIGH SPEED ANALOG INPUT CARD
-FEATURES;
1. 32 ANALOG INPUT CHANNELS
2. 12 BIT RESOLUTION
3. 24,0000 SAMPLES PER SECOND THROUGHPUT
4. TWO 12 BIT ANALOG OUTPUTS
5. .05% NONLINEARITY

5. ENCODER INTERFACE CARD
-FEATURES;
1. DIRECT CONNECTION FOR UP TO FOUR ENCODERS
2. ON BOARD HIGH SPEED COUNTERS TO OFF LOAD THE INTEL COMPUTER OF
TIME CONSUMING COUNTING PROCEDURES.
3. 24 BIT DIGITAL I/O INTERFACE
4. BATTERY BACKUP REAL TIME CLOCK
5. WATCH-DOG TIMER TO ACT AS A FAIL SAFE DEVICE IN THE EVENT OF A COMPUTER
MALFUNCTION
6. DIP SWITCHES AND LED INDICATORS TO ALLOW FOR MONITORING PROGRAM
EXECUTION.
7. DIGITAL FILTERS ON ALL ENCODER CHANNELS TO REMOVE ANY HIGH FREQUENCY
NOISE.
8. ON BOARD INTERRUPT CONTROLLER, TO AID IN INCREASED SYSTEM THROUGHPUT.
9. RESET AND INTERRUPT SWITCHES

6. INTELLIGENT RS232 TERMINAL CONTROLLER CARD
-THE FOLLOWING ITEMS ARE CONNECTED TO THE TERMINAL CONTROLLER BOARD;

1. NEMATRON INDUSTRIAL MONITOR, BAUD RATE 19,200 BPS
2. PRINTER
3. PLC SERIAL COMMUNICATION PORT

THE NEMATRON IS AN INDUSTRIAL QUALITY UNIT AND WILL PROVIDE OPERATOR INTERFACE
TO THE INTEL COMPUTER. IT CARRIES A NEMA 12 RATING AND COMMUNICATES WITH THE
INTEL COMPUTER AT A SPEED OF 1000 CHARACTERS PER SECONDS. THE NEMATRON ALLOWS
FOR INPUT OF THE FOLLOWING DATA;

VIA TOUCHPAD;
1. ENTRY AND EXIT NOMINAL THICKNESS GAGE SETTINGS
2. CORRECTION MULTIPLIER
3. UPPER AND LOWER SPEC LIMITS
4. PRODUCTION NUMBER
5. INCREMENT ROLL POSITION

VIA "SOFT-KEYS";
F11 PRINT HISTOGRAM
F12 CLEAR ROLL POSITION DISPLAY
F13 START STRIP CHART
F14 STOP STRIP CHART
F15 FAULT SCREEN

THE PLC (PROGRAMMABLE CONTROLLER USED IN THE SYSTEM IS A MITSUBISHI A2. THE PC
HANDLES ALL RELAY AND PERMISSIVE LOGIC FUNCTIONS IN ADDITION TO ACTING AS A
FILTER TO ISOLATE DRIVE NOISE.

ALL PUSHBUTTONS AND LIGHTS ON THE DESK AND MILL OPERATOR STATIONS, EXCEPT
E-STOP AND RESET, ARE PROCESSED THROUGH THE PLC.

*********SPECIFICATIONS ARE SUBJECT TO BUYERS VERIFICATION******************