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7. Cycle Time of a Scraper
Cycle time is a crucial aspect of scraper operations, encompassing fixed and variable time components. Fixed time components include loading, dumping, turning, and acceleration, while variable time is primarily influenced by haul and return distances. Proper loading practices and haul route maintenance significantly impact efficiency, with the aim of optimizing productivity and reducing costs.
Sections
This section explains the calculation and components that make up the cycle time of a scraper, emphasizing the importance of load, haul, dump, return, spot, turn, and acceleration/deceleration times.
This section discusses the components and calculation of the cycle time for scrapers, emphasizing the distinction between fixed and variable time and the significance of loading techniques.
Cycle time consists of both fixed and variable components.
Optimal loading practices enhance scraper productivity.
Haul route maintenance is essential for reducing cycle times and enhancing productivity.
Cycle Time
The total time taken for a scraper to complete a loading, hauling, dumping, and returning cycle.
Fixed Time
The component of cycle time that does not vary based on travel distance, including loading, dumping, and turning times.
Variable Time
The component of cycle time that varies depending on travel distance, specifically including haul and return times.
Load Growth Curve
A graphical representation that illustrates the relationship between loading time and payload percentage, highlighting the diminishing returns when overloading the scraper.
Pusher
A machine that assists the scraper during the loading phase, which reduces the loading time and thereby impacts the overall cycle time.
Practice Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
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