By default the tool's serialiser emits `G92 X0 Y0 U0 V0` at the top — that tells the controller "wherever I am right now is zero". So jog the wire to the front-bottom-left corner of your foam block (or wherever you want zero to be) before pressing Run.
If you ticked "Machine has no homing switches" in Settings → Machine type, the G92 line is OMITTED and you have to use whatever zeroing your controller offers (, custom button, etc.) See <a href="https://cncfoam.com/qa.php">the Q&A page</a> for more.
If you ticked "Machine has no homing switches" in Settings → Machine type, the G92 line is OMITTED and you have to use whatever zeroing your controller offers (, custom button, etc.) See <a href="https://cncfoam.com/qa.php">the Q&A page</a> for more.