Which statement best explains why Joint mode is the most efficient method of jogging?

• A. Because the processor does not have to calculate a linear path or maintain the tool center point movement along a Cartesian plane.
• B. Because it uses continuous Cartesian interpolation.
• C. Because it reduces accuracy to increase speed.
• D. Because it ignores joint limits.

Answer: (A)

Moving in Joint mode speeds up jogging because it commands each joint directly rather than planning a Cartesian path for the end-effector. The controller updates joint angles (or velocities) without having to compute a straight-line trajectory or keep the tool tip exactly on a Cartesian line. That reduces the amount of trajectory planning work per step, giving a faster, more responsive jog for quick positioning.

If you were using Cartesian interpolation, the system would have to continuously solve for a straight-line path in Cartesian space and maintain the tool center point along that line, which adds computation and can slow down the jog. The other statements don’t fit because jogging does not inherently reduce accuracy, and the controller does not ignore joint limits—it enforces them for safe operation.