A 2-axis pick-and-place manipulator uses which device for horizontal movement?

A 2-axis pick-and-place manipulator uses which device for horizontal movement?

• A. Rodless cylinder
• B. Hydraulic cylinder with rod
• C. Pneumatic cylinder with rod
• D. Lead screw drive

Answer: (A)

The horizontal axis in a compact two-axis pick-and-place needs an actuator that provides long, smooth travel without protruding parts that could interfere with the other axis. A rodless cylinder fits this perfectly: the piston is inside a hollow tube and drives a carriage along the outside of the tube, so there’s no rod sticking out. This gives a slim, low-inertia, easy-to-package solution with a wide stroke and fast, repeatable motion ideal for quick picking and placing. In contrast, a hydraulic or pneumatic cylinder with a rod has a rod that extends from the end, which can collide with guides or frames in a tight XY setup and adds mass and inertia to the moving part, making precise, rapid horizontal movement harder. A lead screw drive can be very precise, but it tends to be slower and can exhibit backlash and higher friction over long travels, which isn’t as well-suited to the fast cycles typical of pick-and-place tasks. So, for efficient horizontal movement in this configuration, a rodless cylinder is the best choice.

The horizontal axis in a compact two-axis pick-and-place needs an actuator that provides long, smooth travel without protruding parts that could interfere with the other axis. A rodless cylinder fits this perfectly: the piston is inside a hollow tube and drives a carriage along the outside of the tube, so there’s no rod sticking out. This gives a slim, low-inertia, easy-to-package solution with a wide stroke and fast, repeatable motion ideal for quick picking and placing.

In contrast, a hydraulic or pneumatic cylinder with a rod has a rod that extends from the end, which can collide with guides or frames in a tight XY setup and adds mass and inertia to the moving part, making precise, rapid horizontal movement harder. A lead screw drive can be very precise, but it tends to be slower and can exhibit backlash and higher friction over long travels, which isn’t as well-suited to the fast cycles typical of pick-and-place tasks.

So, for efficient horizontal movement in this configuration, a rodless cylinder is the best choice.