94
Trouble
Cause
Inspection / Corrective Active
When starting the
motor, " E
7
" is
displayed and motor
does not rotate.
Low air pressure.
Adjust to the air pressure
0
.
25
-
0
.
3
MPa
(
36
.
3
-
43
.
5
psi).
An Error Code
occurrs and motor
does not run.
An Error has occurred. (Error LED
(ERROR)
⑲
is lit.)
Check P
81
"
17
-
3
Resetting System
after Error Codes. Refer to Table
8
".
Error will not be released until cause of
the error has been removed.
Can not set the
increase or decrease
of the motor rotation
speed.
Motor Fixed Speed is set in the
parameter.
Release parameter
.
(Refer to P89 " 18 - 4
③
Setting Fixed
Motor Speed " section.)
Can not set the
motor speed to its
maximum allowable
speed.
Either the required speed value is higher
than the maximum rotation speed of the
motor, or the upper limit of the rotational
speed has been set in parameter
.
Set the Maximum Rotation Speed to a
value less than the Motor Rotation Speed
set in Parameter
.
(Refer to P
89
"
18
-
4
④
Setting
Maximum Motor Speed " section.)
Parameter
is
.
Check the setting of parameter
.
(Refer to P
86
"
18
-
3
⑧
Selection of
Motor Speed Control Voltage / DC+
10
V
Signal Method " section.) (Refer to P
91
"
18
-
4
⑧
Selection of Motor Speed
Control Voltage / DC+
10
V Signal Method "
section.)
Air Input Monitoring Override is set in
the
parameterto ON and the motor's
maximum speed has been limited to
30
,
000
min
-
1
(rpm).
Check the setting of parameter
.
(Refer to P91 " 18 - 4
⑦
Selection of
Air Input Monitoring Override " section.)
A blinking dot appears
on Digital Speed
Indicator
⑪
. Cannot
set the desired
rotation speed.
Gear Ratio is set to a value other than "
1
.
0
". Check the setting of Gear Ratio. (Refer to
P
66
"
15
-
2
-
1
(
3
) Setting Gear Ratio "
section.
Spindle does not
rotate or rotate
smoothly.
The spindles 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.)
Abnormal vibration
or noise during
rotation.
The tool shank is bent.
Replace the cutting tool.
Cutting debris has contaminated the ball
bearings.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The spindle ball bearings have been
damaged.