L3214 Laser Cutter
User’s Manual
Laser cutting system components
24
2.2.3.3
Droop sensor and tension bar
The edge detection unwinder is equipped with both a droop sensor and a tension bar, allowing
you to choose how to keep the loop of relaxed material constant. When the tension bar is being
used, the droop sensor isn’t, and vice versa.
The tension bar swings back and forth according to the material's tension inside the material
loop, to guide the material onto the conveyor without exerting too much tension on it.
NOTE
: The tension bar always exerts a small amount of tension, however slight,
making it less suitable to use with very stretchy materials.
ATTENTION
: Do not lean on the tension bar when it is locked as this may damage
the tension bar and the locking system.
The droop sensor detects when the unwinder has reeled enough slack material to feed the
laser cutter when required.
In any case, as the roll of material unwinds, a loop is created to relax the material, reducing
distortion, and securing an accurate cut.
2.2.3.3.1
Switching from using the tension bar to using the droop sensor
Before using the droop sensor, the tension bar must be locked. To do so, pull the tension bar
upwards and click the tension bar’s locking pin in the bottom of the push latch to secure it.
