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Or melted... Is that the broken tip of the bit still inside the plastic?

AL

WAG.... Ask your supplier if the Acrylic is CAST OR EXTRUDED? Cast CAN be Engraved or Litho... Extruded can be harder and is not recommended to be carved or engraved as it will damage your...

Did you change the version of acrylic you are using now as the hardness can be very different.

Cast Acrylic Carves but Extruded Acrylic does not carve or rotary engrave. This is from the Engraver...

You joined in August so my first question is how many cut hours? If near 250 then I would replace the two 685ZZ Bearings inside the Y Gear box.

Cut Motor brushes too every 250 cut hours....

AL