Chapter 7 Maintenance and Inspection
33
Troubleshooting checksheet
7.5.
Check the following items in the case of trouble like abnormal noise, vibration, or malfunctions. When it
is not possible to resolve an abnormality even after verifying the corresponding checkpoint, obtain a
“Reduction Gear Investigation Request Sheet” from our Website, fill in the necessary information, and
contact us via the agent where you bought the device.
http://precision.nabtesco.com/documents/request.html
The trouble started immediately after installation of the reduction gear
Check
column
Item
Make sure the equipment’s drive section (the motor side or the reduction gear output surface side) is not
interfering with another component.
Make sure the equipment is not under a greater than expected load (torque, moment load, thrust load).
Make sure the required number of bolts are tightened uniformly with the specified tightening torque.
Make sure the reduction gear, motor, or your company’s components are not installed at a slant.
Make sure the specified amount of Nabtesco-specified lubricant has been added.
Make sure there are no problems with the motor’s parameter settings.
Make sure there are no components resonating in unity.
Make sure the input spline is appropriately installed on the motor.
Make sure there is no damage to the surface of the input spline teeth.
Make sure the input spline specifications (precision, number of teeth, module, shift coefficient, dimensions
of each part) are correct.
Make sure the flange and other components are designed and manufactured with the correct tolerances.
The trouble started during operation
Check
column
Item
Make sure the equipment has not been in operation longer than the calculated service life.
Make sure the surface temperature of the reduction gear is not higher than normal during operation.
Make sure the operation conditions have not been changed.
Make sure there are no loose or missing bolts.
Make sure the equipment is not under a greater than expected load (torque, moment load, thrust load).
Make sure the equipment’s drive section is not interfering with another component.
Make sure an oil leak is not causing a drop in the amount of lubricant.
Make sure there are no external contaminants in the gear, such as moisture or metal powder.
Make sure no lubricant other than that specified is being used.
When the reduction gear is embedded in the customer’s equipment, create your own troubleshooting
checksheet based on the above checkpoints.
