____ robots are generally faster and cleaner than comparable Cartesian systems. Their single pedestal mount requires a small footprint. Its arm is rigid in the Z-axis and pliable in the XY-axes.

• A. SCARA
• B. cartesian
• C. polar
• D. cylindrical

Answer: (A)

SCARA robots are designed for fast, precise horizontal motion with a compact, pedestal-mounted form. Their planar arrangement uses rotary joints in the XY plane, while a rigid vertical axis provides stiff, repeatable Z motion for lifting and placing payloads. This combination keeps moving mass low in the horizontal plane and supports quick, smooth positioning, which translates to high speed and clean operation with minimal backlash. The single pedestal base minimizes the overall footprint, making the system easy to integrate around fixtures and workpieces and helping maintain a tidy, efficient workspace. By contrast, Cartesian systems rely on three linear slides in an expansive frame, which increases footprint and inertia and can slow down acceleration and deceleration; the other configurations introduce non-linear motion paths and greater packaging complexity, making them less ideal for rapid, precise pick-and-place in a small footprint.