· Ultra long contact length ensures high traction even with low friction coefficient between pipe and belt/rubber blocks. · The down caterpillars can be set mechanically/electrically to the pipe position, and the upper caterpillars/rubber blocks arepressed onto the pipe pneumatically. · Each caterpillar is driven by a separate induction motor. · Achieving synchronization control through the digital controller, can ensure that speed of all caterpillars is precisely synchronized. · The haul-off with three caterpillars and above is equipped with the imported LENZE motor. The belt haul-off is equipped with NORD motor. · The imported encoder is adopted to form a closed-loop control and guarantee more stable and reliable speed. · Large color touch screen, alarm status displayand alarm light prompt for easy maintenance.