What controlled early NC machine movement?

What controlled early NC machine movement?

• A. Electrical logic circuitry
• B. Pneumatic system
• C. Hydraulic system
• D. Software algorithms

Answer: (A)

In early NC machines, movement was controlled by electrical logic circuitry, using relays and logic networks that read the punched-tape program and generate the control signals for the machine axes. Those signals determine when to move, in which direction, and by how much, following the sequence encoded in the input tape. The actual motion is carried by actuators (which can be pneumatic or hydraulic), but the decision-making and sequencing come from hard-wired electrical logic, not from software. Software algorithms didn’t control early NC; that came later with CNC, where stored programs run on a computer to produce the commands. So the best explanation is that electrical logic circuitry governed the movement.

In early NC machines, movement was controlled by electrical logic circuitry, using relays and logic networks that read the punched-tape program and generate the control signals for the machine axes. Those signals determine when to move, in which direction, and by how much, following the sequence encoded in the input tape. The actual motion is carried by actuators (which can be pneumatic or hydraulic), but the decision-making and sequencing come from hard-wired electrical logic, not from software. Software algorithms didn’t control early NC; that came later with CNC, where stored programs run on a computer to produce the commands. So the best explanation is that electrical logic circuitry governed the movement.