Automatic screw feeders use ________ to control the speed at which the screw was released into the process.

Automatic screw feeders use ________ to control the speed at which the screw was released into the process.

• A. Gears
• B. Motors
• C. Cylinders
• D. Levers

Answer: (C)

The key idea is using linear actuation to control how fast a screw is released. A cylinder provides precise, repeatable linear motion when driven by compressed air (or fluid pressure). By adjusting the valve and air pressure, you set the cylinder’s extension speed, which directly determines how quickly the screw is pushed or dropped into the process. This setup gives smooth, predictable release timings that can be synchronized with other automation steps. Gears manage rotational speed, which isn’t what controls the release pace in this context. Motors can drive motion, but achieving clean, controlled linear drop often requires converting rotation to linear actuation and adds complexity. Levers are manual and don’t provide automated, consistent speed control.

The key idea is using linear actuation to control how fast a screw is released. A cylinder provides precise, repeatable linear motion when driven by compressed air (or fluid pressure). By adjusting the valve and air pressure, you set the cylinder’s extension speed, which directly determines how quickly the screw is pushed or dropped into the process. This setup gives smooth, predictable release timings that can be synchronized with other automation steps.

Gears manage rotational speed, which isn’t what controls the release pace in this context. Motors can drive motion, but achieving clean, controlled linear drop often requires converting rotation to linear actuation and adds complexity. Levers are manual and don’t provide automated, consistent speed control.