Yaskawa J50M Instructions User Manual

Page 137

(f)

are non-modal group G codes. Do

not use two or more G codes of the same group in
an single block.

(3) How to set the acceleration for linear

Set the maximum acceleration of a single axis in the

parameter.

Setting:

= 1/64

[

/s]

Setting example

How to accelerate to F1OOOO within
0.1 s

10/0.1 = 100
100/(60/64) = 106.7

Set 107 as the maximum acceleration parameter.

(4) How to set the form compensation parameter

Set the servo follow-up coefficient Kx, Ky . . . K4

under the form compensation mode, by the
parameter. The larger this coefficient, the better
the servo follow-up characteristics, and the better
the form precision. But, too large a setting can
cause overshoot. The following value can be
considered as guidance upon setting.
Exponential

time constant: Te (ins)

Servo follow-up coefficient:

[

1- exp

Set the above value to gain orbit precision equiv-

alent to the precision when zero is set as the
exponential

time constant.

However, the

servo delay and machine system delay cannot
completely be disregarded by this value, and the

must be adjusted while measuring the form

precision by using orbit measuring devices if the

form precision is still to be improved.

(5) Parameters related to the form compensation

function

Single-axis maximum

-#6488 (1 to 32767)

acceleration

Servo follow-up

The servo speed loop gain can be increased to

prevent the projection to some degree. However,
increasing vibration and other causes will not allow
the speed loop gain to be increased.

This function is to automatically output the

speed impulse preset as the parameter, when the
move direction of the machine changes, so that the

projection can be “hammered down. ”

(2) Parameters related to the circular projection

compensation function

(a) Circular projection compensation ON/OFF

The following parameters must be set for each axis.

x-axis :

#6056

Y-axis :

#6057 D7 D6

z-axis :

#6058 D7 D6

o 0:

Circular projection compensation off

1 0:

Circular projection compensation on

Always turn the NC power off and then on when

change is made in this parameter.

(b) Offset amount and timing

H2 :
TO :

coefficient

(X-axis)

– #6690 (O to

Servo follow-up

coefficient ky ‘(Y-axis)

– #6691 (O to 65535),

Servo follow-up
coefficient

( Z–axis)

- #6692 (O to 65535)

Servo follow-up
coefficient k4 (4th axis)

- #6693 (O to 65535)

2.14.3

CIRCULAR PROJECTION COMPENSATION

(1)

O v e r v i e w

When a circle is cut

the machining center, a

convex projection can be left at the switch point of
the quadrants.

This projection occurs because the lost motion

affects the machine to disturb immediate movement

when the move direction changed.

Start point of the circular projection

compensation

(Actually when the sign of the command is

reversed. )

Height of the 1st offset amount
Height of the 2nd offset amount
Wait time from the start point to the first
o f f s e t
Width of the 1st offset
Width of the 2nd offset

No. )

( Description)

(Setting

(Unit)

#6071

#6078

#6079

#6080

#6081

#6082

#6083

#6084

#6085

#6086

#6087

#6088

#6089

#6090

#6091

(X-axis

height)

(Y-axis 1st
(Z-axis

height)

(X-axis 2nd height)

(Y-axis 2nd height)

(Z-axis 2nd height)

(X-axis

start

(

( Z-axis comp. start

wait

width)

(Y-ax,.

(?-axis

width)

2nd

2nd width)

(Z-axis 2nd width)

0 255

= 500

0 255

1 = 500

O 255

1 = 500 [pp. ]

O 255

= 500

O 255

= 500

O 255

1 = 500

O 255

1 = 2

O 255

= 2

0 255

= 2

0 255

= 2

0 255

1 = 2 [m. ]

0 255

= z [m, ]

255

= 2 [m, ]

O 255

1 = 2 [m. ]

0 255

1 = 2 [m. ]

Any change made parameters #6056 to #6058

the

of #6056

must

set o.

Any change

made

#6077 #609 becomes effective-by NC

1 2 9