Chips and powders should be continuously loaded, dispersed enough to not completely cover the discs in the receiving collector. Sudden input of large quantities of material that substantially fill the collector should be avoided. Stringy chips may have to be run through a crusher prior to entering the 3D System.

The 3D System can transport any kind of chips or powders.

When transporting the following materials, however, it may be necessary to change the cutting program or pre-treat the materials before they enter the 3D System:

• Balls of stringers or "birds' nests" the size of which greatly exceeds the internal diameter of the pipe.
   
• Chips three or more times longer than the internal diameter of the pipe. Small amounts of such chips may be allowed if they are brittle enough to be easily broken by hand.