Machine Guarding Requirements Flashcards

A robotic cell uses a light curtain to stop motion when breached. This is best classified as which safeguarding category?

Answer: Presence-sensing device

A light curtain is a presence-sensing safeguarding device, not a physical barrier guard.

Automatic or semi-automatic feeding methods reduce risk primarily by doing what?

Answer: Keeping the operator's hands out of the danger zone

Automated feeding keeps operators from placing hands in the point of operation.

Which factor does NOT need to be considered when selecting a safeguarding method for a specific machine?

Answer: The paint color of the machine

Machine color is irrelevant to safeguarding selection; operation, stock size, and feeding method matter.

A gate device (Type A or Type B) protects the operator by doing what during the machine cycle?

Answer: Enclosing the danger zone before the hazardous motion begins

Gate devices provide a movable barrier that encloses the danger area before the cycle starts.

For point-of-operation guarding, who must the guard protect besides the machine operator?

Answer: Any employee in the machine area

Guards must protect the operator and other employees who may be in the machine area.

What is the main danger of using a guard with openings that are too large?

Answer: A worker can reach through into the danger zone

Oversized openings allow fingers or hands to reach the hazardous moving parts.

Before performing maintenance inside a guarded machine, which procedure must be followed in addition to guard removal?

Answer: Lockout/tagout of energy sources

Lockout/tagout must control hazardous energy before maintenance inside a machine.