depending on machine-x and z zero machine reference points are in the upper right hand corner(away from workpiece) whereas your programmable origin point used for your specific program is completely up to you.
Workpiece reference points are specific locations on a workpiece that serve as a basis for measurements and positioning during manufacturing processes. These points are typically defined by geometric features such as edges, holes, or surfaces. System of tolerancing refers to the set of rules and conventions used to specify allowable variations in dimensions and geometric properties of a workpiece. This system ensures that parts are manufactured within acceptable limits to achieve proper fit and functionality.
Stationary reference points are chosen to determine motion because they provide a consistent and fixed frame of reference. By using stationary reference points, it is easier to identify when an object is moving relative to its surroundings. This helps in accurately measuring the speed and direction of the object's motion.
how do you identify points of contention
Reference points: Think about how the part will be made, and how it will be inspected. Usually something will make sense. Try to keep common references between drawing views, and if possible try to base everything from points, planes, or edges that appear in multiple views. Tolerances: Consider how the part will be made- what minimum tolerances can be held on the intended equipment and processes? What is the maximum tolerance on the individual parts that will allow the assembly to fit together and function properly? The right answers lie between those extremes.
If the reference points are not correct, the location of any coordinate will be incorrect.
Reference points are used in order to easily access information that is in a larger collection of data.
The workpiece is holding on the worktable of the machine. The table movement controls the feed of workpiece against the rotating cutter. The cutter is mounted on a spindle or arbor and revolves at high speed. Except for rotation the cutter has no other motion. As the workpiece advances, the cutter teeth remove the metal from the surface of workpiece and the desired shape is produced. reference- http://engineering.myindialist.com/2009/principle-and-working-of-milling-machine/
Setting the work holding device in relation to the machine datums and reference points ensures accurate and consistent positioning of the workpiece. This helps to maintain precision during machining operations, reduces errors, and ensures that parts are consistently produced to the desired specifications. Proper alignment also minimizes the need for manual adjustments and rework, saving time and improving overall efficiency.
2 points
Reference points are important when measuring speed because they provide a stationary frame of reference to compare the movement of an object. Without a reference point, it is difficult to determine if an object is moving or at what speed it is moving. By having reference points, we can accurately measure an object's speed relative to its surroundings.
The two basic points of reference on the surface of the Earth are the North Pole and the South Pole. These points represent the northernmost and southernmost points on Earth's axis of rotation, respectively.