Trouble
Cause
Inspection / Corrective Action
Motor Spindle
does not rotate or
rotate smoothly.
The spindles ball bearings have been damaged. Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The motor has been damaged.
Replace the motor.
(Return to NAKANISHI dealer service.)
Overheating
during rotation.
Cutting debris has contaminated the ball
bearings, and the ball bearings are damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Low air pressure.
Check air hose connection and air pressure.
Abnormal
vibration or noise
during rotation.
The tool shank is bent.
Replace the tool.
Cutting debris has contaminated the ball bearing. Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The spindles ball bearings have been damaged.
Tool slippage.
Collet or collet nut are not correctly installed.
Check and clean the collet and collet nut.
Reinstall the collet and collet nut.
The collet and the collet nut are worn.
Replace the collet and collet nut.
High run-out.
The tool is bent.
Change the tool.
Collet nut is not correctly installed.
Secure the collet and the collet nut correctly.
The collet and the collet nut are worn.
Replace the collet and the collet nut.
Inside of the spindle is worn.
Replace the spindle shaft.
(Return to NAKANISHI dealer service.)
Contaminants inside the collet and the collet
nut or the spindle.
Clean the collet, collet nut and the inside of the
taper and spindle.
The spindle ball bearings has been damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Refer to the E
3000 CONTROLLER Operation Manual.
⑦
Keep the cutting tool shank and collet clean. If contaminants are left in the collet or collet nut, excessive run-
out will cause damage to the cutting tool and or Spindle.
⑧
Do not strike or disassemble the Motor Spindle.
⑨
Please set the cutting tools to minimize the overhang amount. 13mm is the maximum amount of overhang to
maintain high accuracy and safety.
Fig. 15
13
Table
3. Overhang and Speed
Overhang (mm)
Max. Speed (min
-1
) (rpm)
20
N x 0.5
25
N x 0.3
50
N x 0.1
※
N = Max. Operating Speed with
13mm overhang.
13
. TROUBLESHOOTING
If a problem or concern occur, please check the following items prior to consulting your dealer.
14
. DISPOSAL OF THE MOTOR SPINDLE
When disposal of a Motor Spindle is necessary, follow the instructions from your local government agency for
proper disposal of industrial components.
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