UCCNC Spacebar stop?

I am ordering my Laser DL445 this week and will be using it with UCCNC and Vcarve Pro 9.
Can anyone tell me if the Laser beam cuts out if I hit the spacebar to stop cutting? When I am milling using UCCNC I often use the spacebar to pause the Stepcraft and then again to continue. Obviously if I do this while the laser is running it will continue to burn and flare if it doesn't cut out.