With both extruders and disk pelleters, the
operating condition of the machine influences the
processing speed, and thus the strength of the pellet.
For the extruder types of machine, the speed of the
screw which mixes the compost, and also the speed
of the extrusion screw, are very important. For the
disk pelleter type of machine, the speed with which
the compost is fed to the die is important.