6. Trobleshooting

6.2. Trouble Symptoms and Possible Causes

As shown in [table 6-1], there may be many parts as the cause of one phenomenon. Refer to next page to determine which part is malfunction.

Table 6-1 Trouble phenomenon and cause

Defect parts

Reduction

Brake

Motor

Encoder

Fulcrum

Trouble phenomenon

gear

bearing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Overload

[Note1]

 

 

 

 

 

 

 

 

Displacement

 

 

 

 

 

 

 

 

 

Abnormal sound occurrence

 

 

 

 

 

 

 

 

Noise in operation

[Note 2]

 

 

 

 

 

 

 

 

 

 

Staggering at stop

[Note 3]

 

 

 

 

 

 

 

 

 

Irregular twitching

[Note 4]

 

 

 

 

 

 

 

 

 

Abnormal deviation

 

 

 

 

 

 

 

 

 

 

 

Free fall of an axis

 

 

 

 

 

 

 

 

 

 

 

Overheating

 

 

 

 

 

 

 

 

Incorrect action and out of

 

 

 

controll movement

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[Note 1] Overload

---------

Phenomenon occurring when a load exceeds the rated

 

 

motor load. In specific, thermal relay of circuit protector

 

 

is tripped.

 

 

 

 

[Note 2] Noise in operation --

Phenomenon which occurs vibration on operation.

[Note 3] Staggering at stop - Phenomenon which gives oscillating motion when the robot stops.

[Note 4] Irregular twitching --- Phenomenon which gives sporadic twitching when the robot is not in motion.

6-3