Sankyo 11AR manual Nature of Problem Assumed Cause Correction Vibration

			Unit 11
			Repairs and maintenance
	10.3 Troubleshooting procedures (2)
	NATURE OF PROBLEM	ASSUMED CAUSE	CORRECTION
VIBRATION
	Output rotating section	Backlash, torsion, deflection in	Check input drive system
		input system
	Output rotating section	Loose linkage in input system	Change linkage elements, tighten bolts
	Output rotating section	Rotation lag in input system	Change rotation transmission component
	Output rotating section	Insufficient motor power	Increase motor power rating
	Output rotating section	Clutch￿brake timing	Adjust timing cam
	Output rotating section	Cam flaking	Replace cam, reduce load on output shaft
	Input rotating section	Rotating components are	Balance components
		physically unbalanced
	Input rotating section	Rotating components are eccentric	Align centers
	Residual vibration	Insufficient torsional rigidity in	Increase rigidity of output system
		output system
	Residual vibration	Momentum in output system is too	Select a larger indexing drive model
		intense
	Overall	Frame deformity	Increase rigidity of mounting base
TEMPERATURE RISE
	Entire housing	Heat caused by agitation	Check lubrication oil level and viscosity
	Bearing burnout	Rotating speed too high	Adjust eccentric flange
	Cam, cam follower burnout	Too much preload	Check lubrication
	Bearing burnout	Insufficient lubrication	Check lubrication
OIL LEAKAGE
	Input/output shaft	Broken sealing device	Replace sealing device, install dust cover
	Flange surface	Broken O-ring	Replace parts
	Oil plug	Lubricating oil splashes	Change oil plug part number
	Mounting hole surface	Starting hole for tapping goes all	Apply sealant to mounting
		the way through
BROKEN SHAFT
	Input shaft	Damage due to material fatigue	Reduce overhanging load
	Output shaft	Shock load	Install torque limiter on output shaft
	Key shaft	Fretting corrosion	Change friction linkage
	Rust	Ambicient conditions	Apply rust inhibitor or paint surface

32