Some switches prevent the door from being opened

When a door is opened during operation of the machine, it may take a while for the machine to stop completely. If that continued run or movement would allow persons to reach a hazardous moving part, the door needs to be locked. When guard locking switches are fitted, the operator will have to first “tell” the machine that he wants to enter (usually, he/she will press a button).

Then the machine will stop and only then release the door lock. With this additional safety measure, people cannot reach moving parts after opening a door.

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