I just purchased and received the 1600mw Laser CNC Engraving Machine, DIY 3550 CNC Machine Precison 0.1mm with USB Interface and noticed while reading the sheet that came with it that when engraving I need to stop after 10-15 minutes to let it cool down. Does the software have a pause function to do that so that the laser will stop and start back where it left off? Could I get another one or two laser heads and swap them while engraving so I wouldn’t have to wait?