Quick Answer:
Short Answer
Telescoped rolls result from guide response lag or improper sensor mounting. Roll-2-Roll's stiff electromechanical actuators and proper mounting eliminate lag-induced wander.
Telescoped (uneven) roll edges typically result from:
- Response lag: Hydraulic systems have inherent lag from valve response and fluid compressibility. By the time the guide reacts, the web has already wandered.
- Valve balancing issues: Unequal extension/retraction speeds cause inconsistent correction.
- Improper sensor mounting: If the sensor is fixed to the floor instead of the moving stand, or if the mounting arm is flexible, the system receives incorrect position feedback.
The Roll-2-Roll Technologies solution:
- Zero-backlash actuators: Electromechanical actuators respond immediately without the "spongy" feel of hydraulics
- Stiff control loop: Fast response prevents lag-induced wander, especially on outer roll layers
- Proper mounting guidance: Sensor on the moving stand, observing web at a fixed upstream idler, with structurally rigid mounting
The result is perfectly straight-sided rolls without the "drift" that causes telescoping during shipping and handling.