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Summary of Contents for DFE RFA
- Page 1 INSTRUCTION MANUAL Ribbon-Filament Transducer Model RFA DOC 801-0784 R4...
- Page 2 TECHNICAL SERVICE Installations, Start-Up, Troubleshooting, Repairs, Field Service or Returns. Call (603) 332-6150 and ask for Technical Support or email us at: techsupport@dfe.com Replacement Parts, Individual Products, Questions about CUSTOMER SERVICE Orders, Manuals. Call (603) 332-6150 and ask for Customer Service or email us at: customerservice@dfe.com...
- Page 3 Make sure you read and understand all instructions and safety precautions listed in this manual before installing or operating your Model RFA Tension Transducer. If you have any questions concerning the operation of your device or the information in this manual, please contact us.
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Page 4: Table Of Contents
Table of Contents DOCUMENT CONVENTIONS ....................5 GENERAL DESCRIPTION ....................6 CONSTRUCTION AND MECHANICAL OPERATION (see Figure 1) ......6 SPECIFICATIONS ....................... 7 STANDARD FEATURES ..................... 7 CONFIGURATION CHOICES ..................7 OPTIONS ........................8 INSTALLATION ........................9 DIMENSIONS ......................9 PRE-INSTALLATION REQUIREMENTS ..............10 INSTALLATION ......................11 ELECTRICAL OPERATION ..................12... -
Page 5: Document Conventions
DOCUMENT CONVENTIONS NOTES - Highlight important concepts, decisions you must make, or the implications of those decisions. CAUTIONS - Tell you when equipment may be damaged if the procedure is not followed properly. WARNINGS - Tell you when people may be injured, or equipment may be damaged if the procedure is not followed properly. -
Page 6: General Description
The RFA Tension Transducer is typically used in applications where the machine has only one side frame and the idler wheels are cantilevered. The information in this section will help give a clear understanding of the RFA Tension Transducer system - how it works and how it’s used. -
Page 7: Specifications
PB style - Rear with reference to force direction Load Ratings: 10, 25, 50, 100, 150 (45, 111, 222, 445, 670 N) Note: The information below is only applicable if a DFE Wheel or shaft assembly is used. Break-Away Torque: 0.25 in-oz (18 gram-cm) typical... -
Page 8: Options
Load Ratings: 10, 25, 50, 100, 150 lbs (45, 111, 222, 445, 670 N) DFE Wheel Types: Ribbon Wheel (specify width of 1 to 4 inches), Filament Wheel, Adapter Wheel (hub for custom applications). Connector Positions: S, FL: 1:30, 3:00, 4:30, 6:00 (std.), 7:30, 9:00, 10:30, 12:00. -
Page 9: Installation
2 INSTALLATION 2.1 DIMENSIONS Figure 2 – DIMENSIONS... -
Page 10: Pre-Installation Requirements
The surfaces must also be smooth and flat so the transducers can be properly aligned during installation. The RFA Transducer is sold in three different mounting styles and attached to the machine frame by one of three methods: A single bolt (S) through the back of the unit, a four-bolt flange (FL), or a pillow-block type bracket (PB). -
Page 11: Installation
With the transducer properly oriented with respect to its tension force, install mounting fasteners and tighten to secure the transducer in place. WARNING: During installation care should be taken not to drop the RFA Transducer, handle the unit with care, sudden jolts or drops can damage its components and serious injury could result. -
Page 12: Electrical Operation
The strain gages used in the RFA transducer are high output semiconductor devices with up to 33 times greater output than the less expensive foil gages used in some budget transducers. Therefore, the signal amplifier used with these RFA transducers is a very stable, low-gain design. -
Page 13: Calibration And Setup
3 CALIBRATION AND SETUP 3.1 INTRODUCTION No physical calibration adjustments are required with the RFA Transducer. Follow the electronic calibration steps listed in the manual of the Tension Controller, Indicator or Amplifier being used with the device. Some general calibration instructions are listed below for reference. -
Page 14: Care And Maintenance
4.1 BEARING LIFE The bearings in the RFA Transducer will turn continuously in normal operation. They have been selected to give a long service life under typical operating conditions if properly maintained with lubrication. Use the formula below to find the L life, in hours, for your application. -
Page 15: Troubleshooting
5 TROUBLESHOOTING This is a list of problems which could occur during initial start-up or afterwards. The probable causes are listed with the most likely one first and the least likely one last. 1. TRANSDUCER WHEEL SHAKES, VIBRATES, or BOUNCES 1. - Page 16 2. Extreme build-up of dirt, ink, adhesive, grease, or other foreign material inside end of transducer causing interference with beam movement. 3. Transducer cable has broken wire, poor connection, ground, or short circuit. 4. Transducer cables connected incorrectly, or to wrong transducers. 5.
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Page 17: Appendix A: Selection Of Load Rating
As always please feel free to contact one of our Applications Engineers for assistance. The RFA Tension Transducer is available with five standard load ratings ranging from 10 lbs to 150 lbs (45N to 670N). Choose the appropriate wrap configuration from the following diagrams. Then compute the Net Force using the formula below the diagram. - Page 18 3. SELECT THE LOAD RATING Use the table below to select the correct load rating. In some cases, the load rating may be less than the computed Net Force. This is acceptable because the Net Force formula contains an oversizing factor of 2.
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Page 19: Appendix B: Typical Tensions For Various Materials
APPENDIX B: T YPICAL ENSIONS FOR ARIOUS ATERIALS... -
Page 20: Terms And Conditions Of Sale And Shipment
TERMS AND CONDITIONS OF SALE AND SHIPMENT www.dfe.com/terms-and-conditions/ for current Terms and Conditions. - Page 21 307 PICKERING ROAD ROCHESTER, NEW HAMPSHIRE 03867-4630 U.S.A TEL: (603) 332-6150 FAX: (603) 332-3758 E-mail: info@dfe.com Internet: https://www.dfe.com CANADA EUROPE MEXICO UNITED KINGDOM TAIWAN KOREA CHINA INDIA AUSTRALIA SOUTH AFRICA ©2022 DOVER FLEXO ELECTRONICS, INC. 0908 DOC 801-0784 R4 ALL RIGHTS RESERVED...
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