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Summary of Contents for Festo Belt Drives 2
- Page 1 Industrial Maintenance Belt Drives 2 Course Sample 54977-3C...
- Page 2 Festo Didactic. Information in this document is subject to change without notice and does not represent a commitment on the part of Festo Didactic. The Festo materials described in this document are furnished under a license agreement or a nondisclosure agreement.
- Page 3 Caution, risk of danger. Consult the relevant user documentation. Caution, lifting hazard Caution, belt drive entanglement hazard Caution, chain drive entanglement hazard Caution, gear entanglement hazard Caution, hand crushing hazard Notice, non-ionizing radiation Consult the relevant user documentation. Direct current Alternating current © Festo Didactic 54977-3C...
- Page 4 Earth (ground) terminal Protective conductor terminal Frame or chassis terminal Equipotentiality On (supply) Off (supply) Equipment protected throughout by double insulation or reinforced insulation In position of a bi-stable push control Out position of a bi-stable push control © Festo Didactic 54977-3C...
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Page 5: Table Of Contents
Multiple-Belt Drives ..............71 Job Sheet 6 Synchronous Belt Drives ............87 Job Sheet 7 High-Torque Synchronous Belt Drives ........ 103 Appendix A Equipment Utilization Chart ..........117 Appendix B Lockout/Tagout Procedure ........... 119 Appendix C Post-Test ................. 121 © Festo Didactic 54977-3C... -
Page 7: Preface
Bearings and seals • Ball screws and linear bearings • Clutches and brakes • Vibration metering and analysis • Notions of lubrication The figure below shows the available course material for the Mechanical Drives Training System. © Festo Didactic 54977-3C... - Page 8 Mechanical Drives Training System course material. We invite readers of this manual to send us their tips, feedback, and suggestions for improving the book. Please send these to did@de.festo.com. The authors and Festo Didactic look forward to your comments. VIII © Festo Didactic 54977-3C...
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Page 9: About This Manual
About This Manual The Belt Drives 2 manual completes the basics of belt drives. The topics covered in this manual are presented in the form of job sheets. The job sheets include a description of the objectives, a list of equipment required, safety procedures, and a list of steps required to attain the objectives. -
Page 11: To The Instructor
When a student must complete a setup that is already partially mounted, ensure that the setup corresponds to the job description. When the jobs are performed in teams, ensure that each student has and installs a padlock when performing the Lockout/Tagout procedure. © Festo Didactic 54977-3C... -
Page 13: Job Sheet
Sample Extracted from Job Sheets - Instructor... -
Page 15: Job Sheet
A variable-pitch pulley has two setscrews used to lock the pulley onto the shaft and to lock the threaded hub into position. Figure 31 shows the closed and opened position of a variable-pitch pulley. © Festo Didactic 54977-3C... - Page 16 ���� and ���� speed of the driving shaft depends on only one variable. The diameter of a �������� ���� ������������ , as seen in Figure 31. © Festo Didactic 54977-3C...
- Page 17 An adjustable motor base permits varying the center-to-center distance between the shafts. Fixed-pitch pulley Variable-pitch pulley Adjustable motor base Open position of the variable-pitch pulley Closed position of the variable-pitch pulley Figure 32. Variable-speed belt drive with adjustable center-to-center distance. © Festo Didactic 54977-3C...
- Page 18 Variable-speed belt drives with a fixed center-to- center distance are used when bigger ranges of speed variation are required. © Festo Didactic 54977-3C...
- Page 19 Again, the opposite change in the pitch of both pulleys keeps the center-to-center distance between the shafts the same. © Festo Didactic 54977-3C...
- Page 20 A ruler or a measuring tape can be used to make sure the distance between the straightedge and all of the surface points of the small-width pulley shown in Figure 35 are the same when the straightedge is laid on each side of the large-width pulley. © Festo Didactic 54977-3C...
- Page 21 It is also recommended to prevent the surface of the belt to make contact with the bottom surface of the pulley, where the threaded hub is located. © Festo Didactic 54977-3C...
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Page 23: Job Sheet
Refer to Appendix B if necessary. Fix three extrusion bars to the positions shown in Figure 37. Make sure that the other extrusion bars present in the workstation are fixed tight at the back of the workstation. © Festo Didactic 54977-3C... - Page 24 From now on, the 80 mm nominal diameter pulley will be referred to as the driving pulley. Tighten the pulley setscrew on the shaft key. Do not overtighten the pulley setscrew. © Festo Didactic 54977-3C...
- Page 25 Slide the short shaft through the other pillow block bearing. Tighten the setscrews of each pillow block bearing on the flat surface of the shaft. Do not tighten the setscrew on any surface other than a flat surface. This may damage the components. © Festo Didactic 54977-3C...
- Page 26 Figure 38. Measuring the A distance for the variable-pitch pulley alignment. Lay a straightedge on the other side of the driving pulley, as shown in Figure 39. Then note the B distance shown in the figure. Use a measuring tape or a ruler if necessary. © Festo Didactic 54977-3C...
- Page 27 Adjust the belt tension to the recommended deflection force using the belt tension tester and the motor mounting base. Make sure that a reflective tape is present on the front side of both the driving and the driven pulleys. © Festo Didactic 54977-3C...
- Page 28 Set the frequency of the variable frequency drive to 15 Hz. ) using the photo-reflective Measure the speed of the driving pulley (���� tachometer. Driving pulley speed ( ���� ) : ____________ ): about 415 rpm Driving pulley speed (���� © Festo Didactic 54977-3C...
- Page 29 Align the setscrew with the flat surface of the pulley threaded hub. Tighten the setscrew on the flat surface of the threaded hub. Wrap the A48 V-belt around the variable-pitch pulley. © Festo Didactic 54977-3C...
- Page 30 Perform the Variable-pitch pulley alignment procedure. Adjust the belt tension using the belt tension tester, and the motor mounting base to the recommended deflection force shown in Table 7 above. Perform the Start-up procedure. Perform the Testing the system procedure. © Festo Didactic 54977-3C...
- Page 31 Using your measured speed values, calculate the speed ratio � �. ���� ���� Speed ratio: ____________ Speed ratio: approximately 1 Ask the instructor to check your work. Disassemble the setup and return the components to the storage location. Name: ______________________________ Date: ____________________ Instructor's approval: ______________________________________________ © Festo Didactic 54977-3C...