Small parts must be connected either to each other or to the sheet of material to prevent them from falling into the waterjet tank when they are cut. This can mean that the part is left with residual tabs or must be broken off by working the part back and forth until it snaps off from the tab. At Big Blue Saw, we offer various finishing options, like Basic Finish, to remove the tabs for you when necessary.
Loosely connected segments and vibration
This limitation does not come up too often, but it is worth keeping in mind, particularly if you are making signs with lettering or logos. If your part has an “island” connected to the main part by a single very thin segment (also called a bridge), the island area will often vibrate as it is being cut, ruining the smooth cut line. For this reason, we suggest making connectors at least 1/8 inch (3 mm) thick, and placing at least 3 on each island area.
Similarly, connecting segments themselves can vibrate, causing the segment to be destroyed during cutting. Again, make sure that the bridge is at least 1/8 inch (3 mm) wide.