6-231 Before Using the Products2 Preparation3 Connection4 Setup5 Adjustment6 When in Trouble7 Supplement6 3. TroubleshootingWhen in Trouble Overshoot/Undershoot,Overheating of the Motor (Motor Burn-Out)Classification Causes MeasuresAdjustment Gain adjustment is not proper. Check with graphic function of PANATERM or velocity monitor (SP)or torque monitor (IM). Make a correct gain adjustment. Refer to“Adjustment”.Installation Load inertia is large. Check with graphic function of PANATERM or monitor (ConnectorX7). Make an appropriate adjustment. Increase the motor anddriver capacity and lower the inertia ratio. Use a gear reducer.Looseness or slip of themachine.Review the mounting to the machine.Ambient temperature,environment.Lower the temperature with cooling fan if the ambient temperatureexceeds the predications.Stall of cooling fan, dirt of fanventilation duct.Check the cooling fans of the driver and the machine. Replace thedriver fan or request for repair.Mismatching of the driver andthe motor.Check the name plates of the driver and the motor. Select acorrect combination of them referring to the instruction manual orcatalogue.Failure of motor bearing. Check that the motor does not generate rumbling noise whileturning it by hand after shutting off the power. Replace the motorand request for repair if the noise is heard.Electromagnetic brake is keptengaged (left un-released).Check the voltage at brake terminals. Apply the power (DC24V) torelease the brake.Motor failure (oil, water orothers)Avoid the installation place where the motor is subject to hightemperature, humidity, oil, dust or iron particles.Motor has been turned byexternal force while dynamicbrake has been engaged.Check the running pattern, working condition and operating status,and inhibit the operation under the condition of the left.6 3. TroubleshootingWhen in Trouble Motor Speed Does Not Reach to the Setup,Motor Revolutions (Travel) Is Too Large or SmallClassification Causes MeasuresParameter Velocity command input gain isnot correct.Check that the setup of Pr3.02, speed command input gain, ismade so as to make the setup of 500 makes 3000 r/min.Adjustment Position loop gain is low. Set up Pr1.00and Pr1.05, position loop gain to approx. 1000.Division/Multiplication is notproper.Set up correct values to Pr0.09, 1st numerator of electronicgear, Pr0.11, numerator multiplier of electronic gear and Pr0.10,denominator of electronic gear. Refer to parameter setup at eachmode.Related page • P.4-4 “Details of parameter” • P.7-26 “Outline of Setup support software “PANATERM”