bnp-b2365(eng)b.pdf - 第293页
5. Spindle Adjustment 5 - 48 (5) Troubleshooting [1] Orientation does not take place (motor keeps rotating) Cause Investigati on item Remedy Remarks 1 Parameter settin g values are incorrect The orientation detector and …
5. Spindle Adjustment
5 - 47
(4) Setting orientation positioning accuracy check
The positioning accuracy at orientation control is checked by the parameters shown below. An
error is detected if the positioning pulse error amount from the reference position (Z-phase)
exceeds the orientation control pulse miss check value (SP114). When an error is detected, the
spindle continues rotating until the next reference position is detected, and a positioning retry then
occurs. The "A9" warning is activated during the posi tioning retry, and the "5C" alarm is a ctivated if
the number of retries exce eds the number of orientation retry times (SP118).
No. Abbr. Parameter name Details
Setting
range
Standard
SP114 OPER Orientation control
pulse miss check
value
An alarm "5C" will occur if the pulse miss value at the
orientation stop exceeds this setting value. (Note that this is
invalid when set to "0".)
In this parameter, set the value to fulfill the following conditions.
SP114 setting value > 1.5 × SP004
(orientation in-position width)
0 to 32767
(360deg
/4096)
0
SP118 ORCT Orientation control
number of retry times
Set the number of times to retry when an orientation or
feedback error occurs.
The warning (A9) is issued while retrying orientation, and an
alarm (5C) is issued when the set number of times is exceeded.
0 to 100
(time)
0
5. Spindle Adjustment
5 - 48
(5) Troubleshooting
[1] Orientation does not take place (motor keeps rotating)
Cause Investigation item Remedy Remarks
1 Parameter setting
values are incorrect
The orientation detector and
parameter do not match.
SP037 (SFNC5)
Motor PLG.............................. 4
Spindle end detector .............. 1
Magnetic sensor..................... 2
Correctly set SP037 (SFNC5).
2 The specification are
not correct
Motor PLG orientation is attempted
with standard motor instead of motor
with Z phase.
Change to a motor having a
PLG-built-in motor with Z phase.
For motor PLG
orientation
3 Incorrect wiring The connector pin numbers are
incorrect,
The inserted connector number is
incorrect.
The cable is disconnected.
Correct the wiring.
Replace the cable.
[2] The motor overtravels and stops. (The motor sways when stopping.)
Cause Investigation item Remedy Remarks
1 Parameter setting
values are incorrect
The gear ratio parameters:
SP025 (GRA1) to SP032 (GRB4) are
incorrect.
Correctly set SP025 (GRA1) to
SP032 (GRB4).
The phenomenon is improved when
the deceleration rate for orientation
parameter SP006 (CSP) is halved.
Readjust SP006 (CSP) This also applies to:
SP107 (CSP2)
SP108 (CSP3)
SP109 (CSP4)
SP121 (MPCSH)
SP122 (MPCSL)
The phenomenon is improved when
the position loop gain parameters
SP001 (PGM) and SP002 (PGE) are
halved.
Readjust SP001 (PGM), SP002
(PGE).
This also applies to:
SP119 (MPGH)
SP120 (MPGL)
The orientation stop direction is set to
one direction (CCW or CW).
Set the SP097 (SPECO) /bit 0, 1
to "0".
[3] The stopping position deviates.
Cause Investigation item Remedy Remarks
1 Mechanical cause The stopping position is not deviated
with the encoder axis.
There is backlash or slipping, etc.,
between the spindle and encoder.
The gear ratio between the
spindle and encoder is not 1:1 or
1:2.
For spindle end
detector orientation
There is backlash or slipping
between the spindle and motor.
The gear ratio between the
spindle and motor is not 1:1.
For motor PLG
orientation
2 Noise The position detector's cable is
relayed with a terminal block
(connector), etc.
Do not relay the cable.
The position detector cable's shield is
not treated properly.
Properly treat the shield.
The peeled section of signal wire at
the position detector cable's connector
section is large. (A large section is not
covered by the shield.)
Keep the peeled section to 3cm or
less when possible. Keep the
peeled section as far away from
the power cable as possible.
3 The magnetic sensor
installation direction is
incorrect
Check the relation of the magnet and
sensor installation.
Correct the relation of the magnet
and sensor installation.
For magnetic sensor
orientation.
5. Spindle Adjustment
5 - 49
[4] The stopping position does not change even when the position shift parameter is change d.
Cause Investigation item Remedy Remarks
1 Parameter setting
values are incorrect
The position shift was changed to
2048 when the gear ratio between the
spindle and encoder was 1:2 (one
encoder rotation at two spindle
rotations).
If the gear ratio on the left is
established between the spindle
and encoder, the position shift
amount for one spindle rotation is
2048 instead of 4096.
[5] The machine vibrates when stopping.
Cause Investigation item Remedy Remarks
1 Parameter setting
values are incorrect
The gear ratio parameters SP025
(GRA1) to SP032 (GRB4) are
incorrect.
Correctly set SP025 (GRA1) to
SP032 (GRB4).
2 The orientation
adjustment is faulty
The vibration frequency is several Hz. Decrease the position loop gain
parameters SP001 (PGM) and
SP002 (PGE).
Increase the current loop gain for
orientation parameters SP105
(IQGO) and SP106 (IDGO).
The vibration frequency is 10Hz or
more.
Decrease the speed loop gain for
orientation parameters SP098
(VGOP) and SP099 (VGOI).
Decrease the current loop gain for
orientation parameters SP105
(IQGO) and SP106 (IDGO).
[6] The orientation complete signal is not output
Cause Investigation item Remedy Remarks
1 The machine's load is
heavy
The in-position parameter SP004
(OINP) is too small.
Review the in-position range, and
increase SP004 (OINP).
State is improved if delay
compensation control is stopped
during orientation stopping.
(State is improved when changed to
PI control).
Review the values set for the
speed loop gain for orientation
parameters SP098 (VGOP),
SP099 (VGOI) and SP100
(VGOD).
2 Carry out the items for [1] Orientation does not take place (motor keeps rotating).