cyclegraphs.ppt
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Cyclegraph and chronocyclegraph are photographic techniques introduced by Gilbreth to record complex and fast motions. Cyclegraph records the path of movements as continuous lines by attaching light bulbs to body parts. It shows the worker, workplace layout, and path of movements. Chronocyclegraph interrupts the light source to record spots indicating direction and speed of movements, where the shape and spacing of spots show if speed is increasing or decreasing. Both techniques allow accurate recording of motions too fast or complex for the human eye.
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Eric Nizeyimana's document 2006 from gicumbi to ttc nyamata handball play
this notes have been created
by Eric36 at nyamata ttc
after readings
pe book for y2sme .
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官方认证美国密歇根州立大学毕业证学位证书原版一模一样
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- 1. M602.17 1 CYCLEGRAPH AND CHRONOCYCLEGRAPH
- 2. M602.17 2 INTRODUCTION • Is it possible to record all sorts of complex movements in flow or string diagrams and Process charts? • Is it possible to record fast motions by above diagrams?
- 3. M602.17 3 • Yes, the method study recording techniques we have known so far do not record all sorts of complex motions and cannot record fast motions • Here, cyclegraph and chronocyclegraph are the techniques to serve the purpose • Cyclegraph and chronocyclegraph were introduced by Gilbreth INTRODUCTION (contd..)
- 4. M602.17 4 • They are photographic methods and are very accurate • They are used to trace especially those movements which are too fast and complex for the human eye to pursue INTRODUCTION (contd..)
- 5. M602.17 5 CYCLEGRAPH • It records the path of movements of, say, the hands or any other body part of an operator while performing an operation • Little pea light bulbs attached to the hands or fingers of the operator trace continuous lines of movements on the photographic plate • Another exposure to view on the same photographic plate can show all three aspects simultaneously, i.e. worker, workplace layout and the path of movements • Wherever possible, it is better to go for three dimensional pictures
- 7. M602.17 7 CHRONOCYCLEGRAPH • What is the limitation of Cyclegraph? • Cyclegraph neither indicates the direction nor the speed of the movements
- 8. M602.17 8 • Chronocyclegraph incorporates in it, a system of interrupting the light source (from 10 to 30 times per second) • Instead of recording the path of movements as continuous lines, it records the same in the form of pear shaped spot on the photographic plate • The pointed end of the pear shaped spot shows the direction of movement • The shape and spacing of these spots indicate whether the speed of working is increasing or decreasing CHRONOCYCLEGRAPH (contd..)
- 9. M602.17 9 • More elongated spots with longer gaps between them mark higher working speed • Knowing the rate at which the light source is being interrupted, the speed of movement can be easily determined CHRONOCYCLEGRAPH (contd..)