Laser Machine Grounding/Earthing

[Want2build1]

At the moment I have TN-S into the house.
Armoured cable off it's own box from the house to the workshop.
Workshop is about 50m from the house.
Workshop takes the Earth from the house cable. (like TN-S)

To make the work shop TT, I would lift the incoming earth and replace with an earth rod .
Is that what you are suggesting ?

Still, the question is .. does the machine need it's ground connector wiring up, if it has ground/earth through the plug socket (which is linked to the ground connector on the machine panel) To me, it seems redundant ?

I can only assume, that the Laser Machine manufacturers are covering themselves for installations that don't have an earth circuit / system, either because of country or location ?