A center of gravity test is one of three standard services utilized to provide a complete roller circle assessment (center of gravity test + roller load test + rail spall test):
A center of gravity test provides answers to the following questions:
- How uniformly distributed are the loads on the roller circle?
- What are the stresses on the diaphragms relative to radial position?
- Is cracking in the circumferential diaphram and critical support structures likely, and if so when?
- What are the ideal center of gravity positions for my machine?
- What are the center of gravity positions during operation?
- What is the center of gravity position during Zero Suspended Load?
- What is the center of gravity position during machine relocation?
- Is the dragline correctly ballasted?
- If not how much ballast should be added or removed and at what location?
- What is the machine weight?
- Have the rail pads been correctly machined?
- Was the revolving frame properly supported during rail pad machining?
