The Cutting Strip is the white or black strip on the Silhouette cutting machine along the path where the blade points down.
What Does It Do?
This strip is designed to prevent damage to the blade or the machine when cutting materials that bypass the cutting mat (i.e. vinyl).
If you cut too deeply with a material that bypasses the cutting mat, you can potentially cut past the material and into the cutting strip. You should always ensure that your Force and Blade settings are such that the blade is cutting through the material as desired, but not so deeply that it continues through the material and into the cutting strip.
Cutting Strip Damage
If you do cut into the strip, you will need to lower the Force and/or Blade setting to the lowest possible setting where the material can still be cut through properly, but not so deeply that it is cutting through into the strip.
Indentations on this strip are normal and will be experienced even if you do not cut all the way through into the strip. The cutting strip will be naturally indented as cutting passes are performed.
Extreme fraying caused by deeper cuts is not normal. This indicates the Force and/or Blade settings are too high and need to be lowered.
Cutting Strip Replacement
The cutting strip typically does not need to be replaced unless it is affecting your cutting results. Below is a video showing you how to replace the Cutting Strip: