MDS-C1-SPA Series INSTRUCTION MANUALib1500152(eng)a.pdf - 第155页
4. Spindle Adjustment 4 - 64 4-3-5 Adjusting S-analog high-speed tapping control (1) Necessary input/output I/O Signal name I/O mode Mandatory/Opti onal S-analog high-speed tapping input (HSP) General-purpose input Analo…
4. Spindle Adjustment
4 - 63
[4] The stop position does not change even when the position shift parameter is changed.
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).
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).
2 The orientation
adjustment is
faulty
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, indexing complete signal is not output
Cause Investigation item Remedy Remarks
1 Parameter
setting values are
incorrect
Orientation completion or indexing
completion is not set to the
general-purpose output. Or the actual
orientation completion is wired to a
different output from the one set in the
parameter .
Set "1" or "2" in one of the
general-purpose output parameters
SP141 to SP154 which corresponds to
the output section where the orientation
completion has been wired.
The in-position parameter SP004
(OINP) is too small.
Review the in-position range, and
increase SP004 (OINP).
2 The machine's
load is heavy
Stop the delay compensation control
during orientation stop to solve the
problem. (Change to the PI control to
solve the problem.)
Review the values set for the speed
loop gain for orientation parameters
SP098 (VGOP), SP099 (VGOI) and
SP100 (VGOD).
3 Carry out the items for [1] Orientation does not take place (motor keeps rotating).
4. Spindle Adjustment
4 - 64
4-3-5 Adjusting S-analog high-speed tapping control
(1) Necessary input/output
I/O Signal name I/O mode Mandatory/Optional
S-analog high-speed tapping input (HSP) General-purpose input
Analog speed command input (bipolar) Analog input
Input
Forward run signal (SRN), reverse run signal (SRI) Special input
Pulse feedback output signal Special output
Up-to-speed output signal General-purpose output
Output
Zero speed output signal General-purpose output
: Mandatory
(2) Operation sequence
OFF
ON
OFF
t1
Motor speed
Forward run start
Up-to-speed
S-analog high-speed
tapping
OFF OFF
ON ON
ON
ON
ON
ON ON ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
O
O
S-analog speed
command voltage
Reverse run start
Zero speed
Mode
Regular speed loop Regular speed loop S-analog synchronous tapping mode
4. Spindle Adjustment
4 - 65
[Outline of operation]
Turn OFF the start command for forward run, reverse run and orientation to stop the motor. Then, turn
the speed command voltage to "0". After that, turn ON the forward run command, then the S analog
synchronous tapping com mand. Th e sp indle drive un it makes the spe ed command cu shion t o "0" whil e
S analog synchronous tapping command is ON and rotates the motor according to the given speed
command voltage. Create a position loop for the NC unit, based on A-, B-, Z-phase pulse of the pulse
feedback signal output from the spindle drive unit.
CAUTION
1. A-, B-, Z-phase pulse output from the pulse feedback output are determined
by the detector to be used for orientation and cannot be selected arbitrarily
when using this function.
2. When focusing precision while using this function, the load inertia shall be
less than 3-times the motor inertia.
3. In the case where no orientation function is available, this function can be
used even if PLG with Z phase is not mounted onto the motor. However, in
that case, Z phase signal will not be output from the pulse feedback output,
and the one-rotation position cannot be detected.
4. When inputting the speed command, always use the bipolar analog input
section. Also, set the parameters in bipolar settings.
5. When a coil changeover motor is u se d, do not turn the L-coil selection
signal ON/OFF during this control. When L-coil selection signal is turned
ON/OFF, the coil changeover operation is immedi ately executed with the
spindle drive unit, causing some failu re such as breakage of taps.
(3) Confirming the initial parameters
When using this function, NC side parameters greatly affect, as well. Refer to the NC manual and
confirm the default value settings for the NC related param eters.
<Spindle drive unit side pa rameters>
No. Abbrev. Parameter name Unit Setting range Initial value
SP037 SFNC5 Spindle function 5 － 0000 to FFFF *
SP038 SFNC6 Spindle function 6 － 0000 to FFFF *
SP129
to
SP140
HI01
to
HI12
General-purpose input selection 1 to 12 － 0 to 21
17:S-analog
high-speed
tapping
SP141
to
SP154
HO1e
to
HO6c
General-purpose output selection open emitter 1 to open collector
6
－ 0 to 23
14:Up-to-speed
15:Zero speed
SP155 SAtyp S-analog speed command input type 0 to 1 0
SP171 HSPT S-analog high-speed tapping motor maximum speed r/min 0 to 32767 0
SP172 VGHP S-analog high-speed tapping speed loop proportional gain 0 to 1000 0
SP173 VGHI S-analog high-speed tapping speed loop integral gain 0 to 1000 0
SP174 HPYV S-analog high-speed tapping variable excitation rate (min value) % 0 to 100 0
SP175 HSgn* S-analog high-speed tapping speed command gain 1/1000-fold 0 to 2500 0
SP176 HADof* S-analog high-speed tapping speed command offset － -999 to 999 0
(Note 1) Symbols used in the parameter setting column
*: Set according to machine specifications, －: Setting irrelevant
(Note 2) Parameters having an abbreviation with "*" are validated right after the settings are changed by the personal computer,
without turning the spindle drive unit's power ON and OFF.
POINT
Always adjust the synchronous tap control after adjusting the operation following the
speed command and the acceleration/deceleration time, and after adjusting the
servo axis synchroni zed with the spindle during synchronous tap control.