Safety Light Curtains

Settlement for installation place(Installation of safety light curtains)

For personnel security assurance, the installation place of safety light curtain should conform to distance and height requirements. Calculation of safe distance: Safe distance refers to the request minimum distance from screen plane of safety light curtain to dangerous equipments part.

For the machine or equipment, machine slider or dangerous parts can have the auto-stop anywhere of the run. Safety formula: Ds=K (T+C)
- K: the operator's hands extension speed, generally count in 1600mm/s
- T1: response time of safety light curtain, about 0.02s
- T2: Maximum braking stop time, that is the time from braking start to slider or dangerous stop, unit in S

For the machine or equipment, machine slider or dangerous parts can not have the auto-stop anywhere of the run Safety formula: Ds=KT T=(1/2 +1/N)Tn
- K: the operator's hands extension speed, generally count in 1600mm/s
- T: slider or dangerous parts trip down to the dead point, unit in S
- N: joint slots number of clutch
- Tn: a lap rotation time for crankshaft, unit in S

Calculation of safe height(Installation of safety light curtains)

Height position refers to screen relative to up and down position of machine dangerous parts. That is on the basis of safe assurance, the undermost beam should not be higher than lower limb of dangerous part, and the topmost beam should not be lower than upper limb of dangerous part. Protection height≥ dangerous part trip+regulating variable