Rockford Systems Control Systems for Presses Catalog

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SAFEGUARDED PART-REVOLUTION-CLUTCH PRESS Sprockets and Chain (Under Cover) Resolver/Pulser Assembly Remote Operator Station With Keypad/ Display Danger Signs Custom Plain-Door, Solid-State Control Box With Disconnect and Motor Starter Presence-Sensing Device (Light Curtain) Side Barrier Guards Palm Button Assembly (Two-Hand Control) Foot Switch A Part-Revolution-Clutch Press With Clutch/Brake Control and a Presence-Sensing Device and Two-Hand Control as Safeguards 22 | CONTROL SYSTEMS
PART-REVOLUTION-CLUTCH PRESS CONTROL SYSTEMS – SSC-1500 PRESS CONTROL SSC-1500 PRESS CONTROL PART-REVOLUTION CLUTCH The majority of part-revolution presses have an air-applied clutch and an air-released brake. They are designed to trap air in a chamber or tube. When compressed air is put into these chambers or tubes, the clutch is engaged and the brake is released. The press then starts a cycle. To stop the press, the opposite takes place. A part-revolutionclutch press can be engaged and disengaged at any position of crankshaft rotation or revolution. Occasionally older mechanical-friction-clutch presses are found in plants and are still being used. Sometimes press brakes with mechanicalfriction clutches are used as power presses. These press brakes and the older mechanical-friction-clutch presses can be updated by adding a properly sized air cylinder to the part-revolution control packages that are offered. See pages 83 and 84 for these air cylinders. Due to the many detailed OSHA requirements on part-revolutionclutch presses, most existing clutch/brake control systems on presses do not meet safety standards and regulations if they were installed prior to 1971. Most of these presses do not have control reliability and brake monitoring. The part-revolution-clutch/brake control-reliable systems in this catalog are designed to stop the press and render it inoperable if there is a single component failure in the control system. This is done by minimizing the use of static-condition components and using critical, redundant components that are checked. Microprocessors or relays of special construction are used in this type of reliable control system (see page 111). The clutch/brake control systems offered here are furnished with a built-in, two-hand control safeguarding device. In addition to the clutch/brake control meeting the requirements of the safety standards, all part-revolution presses require a safeguarding device or guard (barrier) to protect people that operate, set up, and maintain these machines. The following are OSHA- and ANSI-recognized methods for safeguarding the point of operation on part-revolution-clutch mechanical power presses: 1. Barrier guard (Catalog EX-AL) 2. Presence-sensing device (Catalog MSD) 3. Two-hand control (Refer to this section) 4. Pullback (Not offered by Rockford Systems) 5. Restraint (Catalog MSD) 6. Type A or B gate (Catalog MSD) When safeguarding, please keep in mind that the sides and back of the point of operation must also be safeguarded to protect the operator and other employees. OSHA’s safety distance formula for two-hand control, two-hand trip, and presence-sensing devices can be found on pages 119-120 of this catalog. Refer to our MSD catalog for ANSI’s safety distance formulas. Other considerations on a part-revolution-clutch press are the main power disconnect switch, magnetic motor starter, covers for the flywheel, gears, etc. PART-REVOLUTION CONTROL SYSTEMS A part-revolution control system consists of: 1. A control box (pp. 28-37) 2a. Individual components (pp. 38-43) OR 2b. Component packages (pp. 44-45) We offer a variety of control boxes that can be furnished to meet your specific requirements. The SSC-1500 solid-state control box version is available as follows: 1. Standard clutch/brake control 2. Custom clutch/brake control which includes a fused disconnect switch and magnetic motor starter 3. Special clutch/brake control 4. Remote operator style SELECTING A CONTROL SYSTEM 1. To order a complete control system which includes control reliability and brake monitoring, determine which style control box is required. A standard control box includes the clutch/brake control and transformer. Standard Control CONTROL SYSTEMS | 23
Page 1 and 2: Control Systems For Presses and Pre
Page 3 and 4: INTRODUCTION OUR MISSION Our aim is
Page 5 and 6: IN GENERAL IN GENERAL When safeguar
Page 7 and 8: MECHANICAL POWER PRESS CONTROL SYST
Page 9 and 10: FULL-REVOLUTION-CLUTCH PRESS CONTRO
Page 21: FULL-REVOLUTION-CLUTCH PRESS CONTRO
Page 25 and 26: PART-REVOLUTION-CLUTCH PRESS CONTRO
Page 59 and 60: HYDRAULIC POWER PRESS CONTROL SYSTE
Page 69 and 70: PRESS BRAKE CONTROL SYSTEMS PRESENC
Page 71 and 72: PRESS BRAKE CONTROL SYSTEMS HOSTAGE
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PRESS BRAKE CONTROL SYSTEMS SSC-150
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MECHANICAL PRESS BRAKE CONTROL SYST
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HYDRAULIC PRESS BRAKE CONTROL SYSTE
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SURVEY FOR PRESS BRAKES SURVEY FOR
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SURVEY FOR PRESS BRAKES SURVEY FOR
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PALM BUTTON ASSEMBLIES OPTIONAL PAL
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DANGER SIGNS AND LABELS DANGER SIGN
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DANGER SIGNS AND LABELS DANGER SIGN
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REFERENCES GUIDE FOR THE INSPECTION
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REFERENCES PART-REVOLUTION OBI PRES
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REFERENCES CONTROL RELIABILITY Cont
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REFERENCES SAFETY REQUIREMENTS FOR
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REFERENCES Inch means an intermitte
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REFERENCES OSHA 29 CFR 1910.217—M
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REFERENCES OSHA 29 CFR 1910.147—L
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REFERENCES STD 1-7.3 LOCKOUT/TAGOUT
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REFERENCES STD 1-7.3 LOCKOUT/TAGOUT
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MACHINIE SAFEGUARDING SEMINARS SEMI
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INDEX P R S Part-Revolution-Clutch
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NOTES CONTROL SYSTEMS | 141
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Rockford Systems Control Systems for Presses Catalog

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