Continuity between box and x axis

my table and cutter were working great last week and then for some reason afger changing out the consumables the torch (everlast 62i) wont fire and there is 175ohms of auto z reading onvolt metere when machine is off. there should be zero. i have the plastic isolator installed between the box and leg and still the same.

any ideas or someone been down this road?

Cheers and thank you, mike