MDS-C1-SPA Series INSTRUCTION MANUALib1500152(eng)a.pdf - 第156页

4. Spindle Adjustment 4 - 65 [Outline of operation] Turn OFF the start comma nd for forward run, revers e run and orientation to stop the motor. Then, turn the speed command voltage to "0". After that, tu rn ON…

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

Motor speed

Forward run start

Up-to-speed

S-analog high-speed

tapping

OFF OFF

ON ON

ON ON ON

OFF

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.

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

SP140

HI01

HI12

General-purpose input selection 1 to 12 － 0 to 21

17:S-analog

high-speed

tapping

SP141

SP154

HO1e

HO6c

General-purpose output selection open emitter 1 to open collector

－ 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.

4. Spindle Adjustment

4 - 66

(4) Adjustment

General adjustment method is described in the following. Note that, however, if the adjustment

method is described in the adjustment manual for the NC to be used, the NC adjustment manual

takes precedence over thi s manu al.

(5) Adjusting the acceleration/deceleration time constant

Synchronous tap synchronizes the operation with the servo. Generally, the spindle takes longer to

accelerate and decelerate, so the acceleration/deceleration time constant is determined on the

spindle side. Measure the acceleration time for the S command, and set a value 1.5-fold of the

measured value as the standard value.

If the spindle maximum rotation speed is 2000r/min during synchronous tap operation, first carry

out 2000r/min acceleration/deceleration with the S command as shown below. Then, measure the

total acceleration time in a linear, 2-step or 3-step state. The time constant for synchronous tap

operation is 450ms which is 1.5-fold 300ms.

When the value other than "0000" is set to the spindle parameters SP314 to SP319 or SP378 to

SP383, change the parameter value as follows and turn the spindle drive unit's power ON/OFF or

turn the alarm reset input ON/OFF before collecting the acceleration/deceleration data.

Set the same value as SP314 to SP317, SP315 to SP318, and SP316 to SP319.

Set the same value as SP378 to SP381, SP379 to SP382, and SP380 to SP383.

Upon completion of the measurement, be sure to return the changed parameter value to the

original setting value.

1000

2000

Accelerat i on time during S command

Standard accel erati on time duri ng synchronous tap (1. 5-fold)

Measuring the acceleration time during S command

Speed FB

[r/min]

300 450 [ms]

During

S command

During synchronous

control

POINT

When executing the synchronous tappin g operation with the coil changeover motor,

the coil must be fixed and used. In this case, fix all the coils to be use d one by one,

and carry out S command to measure the acceleration/deceleration time.