Another tracking method is EPC. Belt position is watched by sensors.
When sensors find that the belt is out of track, pulley shaft is moved to adjust tension on both belt width edges.
EPC is especially important when the operating temperature is over 150 degrees.
In the room temperature crown pulleys are used. Up to 150degrees V-guide is available.
But V-guide does not stand heat over 150 degrees.
Title: Steel Belt and Tracking 5. EPC / Edge Positioning Control
