|
Portable Coordinate Measurement Machine |
|
|
2-1-3. This designation indicates 2 axes of rotation at the base, 1 at the elbow and 3 at the wrist. This configuration is typically employed if a non-contact sensor is to be used with the arm. |
|
2-2-2. This designation indicates 2 axes of rotation at the base, 2 at the elbow and 2 at the wrist. This configuration is very popular as it allows the arm to articulate in and around large objects. |
|
2-2-3. This designation allows for seven axes of rotation, 2 at the base, 2 at the shoulder and 3 at the wrist. This model offers the flexibility of the 2-1-3 at the wrist joint, as well as the ability to navigate around large objects at the elbow. |
|
A portable coordinate measurement machine (PCMM) is an articulating arm that consists of 3 joints: the base, elbow, and wrist. Data are collected at the probe tip, most often through the use of a manual switch or button. A PCMM requires either an integrated or separate controller unit that calculates the probe position based on the angles of the encoders at each joint and the lengths of each link. The XYZ data is then transferred via a serial line to the application software executing on a computer. Each joint may have a varying number of axes of rotation. The distribution of the axes of rotation is usually described by a 3-number designation.
|