Hi folks. This mere hobbyist is looking for help/suggestions. Since moving home and my laser engraving machine, when I engrave and cut plastic sheets, shooting flames occur. Randomly when engraving but MAJORLY when cutting. The engraving result is OK but it doesn't cut right through the material and the heat/flames buckle the substrate. Not to mention the danger involved with shooting flames. This issue has only started since moving the machine. I've realigned the beams & adjusted the power & speed settings to no avail. Does anybody out there have any ideas for a solution? Thanks in advance :-)