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Magpowr DIGITRAC 2 Instruction Manual

Digital tension readout and control
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DIGITAL TENSION READOUT AND CONTROL
Section
Title
1
Introduction ........................... 2
2
Installation............................. 2
3
Electrical Connections .......... 3
4
Setup and Calibration ........... 3
5
PA-2/PA-90 Installation......... 5
6
Optional Features ................. 6
7
Trouble Shooting ................ 12
8
Reset Procedures ............... 15
All of the information herein is the exclusive proprietary property of Magnetic Power Systems, Inc., and is
disclosed with the understanding that it will be retained in confidence and will neither be duplicated nor copied in
whole or in part nor be used for any purpose other than for which disclosed.
Copyright 2002, all rights reserved.
850A154-1
8/02 Rev. D
Magnetic Power Systems, Inc.
1626 Manufacturers Drive. Fenton, MO 63026
Tel: 636.343.5550 Fax: 636.326.0608 magpowr@magpowr.com
INSTRUCTION MANUAL
DIGITRAC
TABLE OF CONTENTS
Page
Figure
1
2
3
4
5
6
% % % %
2
Title
Specifications ....................... 20
Wiring Isolated Inputs .......... 15
System Types....................... 16
PA-2 Installation ................... 17
Wiring Diagrams................... 18
Outline Dimensions .............. 19
Screen Flow Chart................ 21
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Summary of Contents for Magpowr DIGITRAC 2

  • Page 1 Magnetic Power Systems, Inc. 1626 Manufacturers Drive. Fenton, MO 63026 Tel: 636.343.5550 Fax: 636.326.0608 magpowr@magpowr.com INSTRUCTION MANUAL % % % % DIGITRAC DIGITAL TENSION READOUT AND CONTROL TABLE OF CONTENTS Section Title Page Figure Title Page Introduction ......2 Specifications ....... 20 Installation......

  • Page 2: Introduction

    INTRODUCTION The MAGPOWR Model DIGITRAC 2 is a microprocessor based control, designed for precise closed loop tension control of a moving web. All data entry and calibration is done through the touch pad keyboard. The DIGITRAC 2 is capable of controlling web tension in unwind, rewind, or point-to-point applications. Throughout this manual, bold words or symbols represent keystrokes.

  • Page 3: Electrical Connections

    See Section 6 for other options and connections. Route AC power away from sensor and control wiring. MAGPOWR sensor cables are color coded on the nameplate. Run all wiring in shielded cable. Connect shields to the enclosure using the standoffs provided.
  • Page 4 4.1 System Set up Basic calibration cannot be performed if E-STOP is open, or if RUN/STOP is in run mode. A complete flow chart is shown in Figure 6. To begin basic calibration, do the following: Press SHIFT, Press PROGram, to select ) PROGRAM: CALIBRATE ( , Press NEXT to select ) CALIBRATE BASIC ( , Press NEXT to display ) SELECT SYSTEM ( .

  • Page 5: Trouble Shooting

    4.3 Dynamic Tuning Use NEXT or PRIOR to enter the DESIRED TENSION screen and enter the desired value. Follow the flow chart, Figure 6, to enter CALIBRATE DYNAMICS. When asked to OPTIMIZE in any of the following steps do the following: 1.

  • Page 6: Table Of Contents

    OPTIONAL CONNECTIONS, FUNCTIONS AND OTHER TECHNICAL INFORMATION TABLE OF CONTENTS HARDWARE ALTERNATE TENSION INPUTS ............... 6.1 DIAMETER INPUT ..................6.2 WEB SPEED INPUT................... 6.3 RUN/STOP ....................6.4 E-STOP ...................... 6.5 REMOTE TENSION ON/OFF..............6.6 ISOLATED LOGIC INPUTS (RUN/STOP, ETC.) ........6.7 SELECTING OUTPUT VOLTAGE/CURRENT...........

  • Page 7: Web Speed Input

    PULSE (0 to 5 vdc, 0 to10,000 pps) Diameter is calculated by dividing web speed by this signal, which is proportional to unwind/rewind RPM. Select ) PULSE ( on JP15 on main PCB. TB3.5 can be used to supply 5vdc to the pulse generator.

  • Page 8: Selecting Output Voltage/Current

    If the PA-2 or PA-90 Power Amplifier is used, select current and voltage per Figure 2. +5vdc SUPPLY (TB3.5(+) to TB3.6(-)) Total current capacity is 150 madc. Subtract sensor current of: 30 madc per MAGPOWR sensor 45 madc per 120 ohm sensor connected per Section 6.1 OPERATOR SCREENS The operator screens are those normally used during machine operation and are accessed using NEXT ITEM or PRIOR ITEM from the HOME screen.

  • Page 9: Manual Mode

    6.11 MANUAL MODE Switch to MANUAL mode at any time using SHIFT,. The output is now fixed at the level set in the MANUAL LEVEL screen. Switch back to AUTOMATIC mode using SHIFT, 6.12 TAPER TENSION Taper tension is used on rewinds to make better rolls by reducing full roll tension compared to core tension. Use PROGRAM-CONFIGURE to select TAPER TENSION.

  • Page 10: Setups And Copy Setups

    6.16 SETUPS AND COPY SETUPS There are six independent setups. Each contains its own complete set of parameters. Switch between setups only while stopped using SHIFT, 1, etc. Each setup can be calibrated individually as described in Section 4, or the sensor calibration and parameters in any one setup can be copied to any other setup.
  • Page 11 PROPORTIONAL GAIN (33) Generates an output adjustment proportional to the error. START TIME (22) Provides a soft-start when starting with a slack web. The output is limited to the HOLD LEVEL at start, but the limit level is increased with time.
  • Page 12 The following appear only if inertia comp is used: DIAMETER AT THIS WEIGHT The roll diameter at the entered weight. Diameter must be calibrated while the web is running. It is not necessary to calibrate at the maximum velocity. ROLL WEIGHT The roll weight at any diameter in lbs or kgm.
  • Page 13 ) MAXIMUM TENSION TOO Selected maximum tension is Calibration can be completed by using a smaller maximum tension. See ) Maximum HIGH ( out of sensor range. tension is out of range ( below. ) SENSOR SIGNAL TOO Maximum tension is out of 1.

  • Page 14: A154

    Tension oscillates (continued) STAB needs adjustment 1. Go to OPTIMIZE STAB (ignore reference to full roll). 2. Press and hold é until the oscillation stops. 3. If oscillations cease, optimize COMP and then optimize ERROR LIM. 4. If STAB is max go to ) STAB is max ( . Tension oscillates (continued) STAB is max This is extremely rare.
  • Page 15 RESET PROCEDURES If it is desired to reset parameters to factory default values perform one of the following reset procedures: Simultaneously pressé and ê and hold for 2 seconds. ) RESETTING PARAMETERS ( will appear on the screen for 1 second. Program reset is complete.

  • Page 20: Specifications

    % % % % DIGITRAC 2 Specifications 115 or 230 volts rms, 10% Supply Voltage Supply Frequency: 50 or 60 cycles per second, sinusoidal Fuses: F1, F2 1.6 amp, Littelfuse Part No. 21601.6, or Wickmann Part No. 19194-053-FS Enclosure Front Panel IP65 (IEC529) Enclosure IP20 (IEC529)

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