Operating Precautions

• 1. Confirm that all the loads acting on the ZCA, regardless of whether they are static or dynamic, do not exceed the basic capacity, permissible input shaft torque, or allowable overhang load. (For details, click here to see Selection Procedure )
• 2. Install a shock absorber if necessary to protect the unit from direct impacts.
• 3. A gear motor, servo motor, or similar device can be used as the drive source. Because this unit has extremely high efficiency, the motor may reverse depending on the applied load. Be sure to use a brake or brake motor to prevent reversing caused by inertia or load. Use a highly-responsive brake with a braking torque of 150% or more.
• 4. When the mean unloaded operating torque makes up 25% or more of the required input torque, the torque fluctuation caused by the chains engaging becomes larger. For smooth operation of the unit, select a model by increasing the mean unloaded operating torque as 1.5 times.
• 5. Although the mean unloaded operating torque may become high for some time after the first use of the unit, this is part of the bedding-in process. Use the unit as it is.
• 6. On models without a motor, the duty factor (%ED) [Operating time / (Operating time + Rest time)] conforms to the capabilities of the drive source since it is dependent on the motor or equipment providing input.
• 7. When using in equipment that will transport people, install a protection device on the equipment side to ensure safety.
  Operating the equipment recklessly may lead to accidents resulting in injury or death, or damage to the equipment.
• 8.When using in lifting applications, install a safety device on the equipment side to prevent sudden drops.
  Sudden equipment drops may lead to accidents resulting in injury or death, or damage to the equipment.
• 9. When using in suspending applications, always install a safety device in case the chain breaks. In addition to installing a safety fence, never pass underneath suspended items.
• 10. Do not use the built-in mechanical brake for braking even when using a servo motor and stopping in an emergency. Be sure to use control logic that activates the mechanical brake after deceleration by the dynamic brake. For details, refer to the motor manufacturer’s instruction manual.