JUKI DDL-8000A Engineer's Manual page 115

⑯ 8000A BT solenoid impact absorbing
The initial value of the memory switch is set so that the lower impact sound of touch back is lowered with
stitching pitch of 2 to 4 mm at the time of shipment.
If the impact sound at touch back is large, change in the braking timing and Duty described below can
reduce the impact sound.
Apply brake immediately before the solenoid for impact sound reduction reaches the stroke end when the
touch back solenoid is activated.
(Apply brake at P149 Duty for P169 time after passage of P168 time.)
Apply brake immediately before the solenoid for impact sound reduction reaches the stroke end when the
touch back solenoid is deactivated.
(Apply brake at P170 Duty for P75 time after passage of P74 time.)
Name of signal
ON
HEDA_PWM
OFF
ON
REVERSE
OFF
If the memory switch described above is changed, multi-layer stitches of automatic reverse are not
matched each other, and therefore, change in the initial position of the automatic reverse is also
necessary.
To match the stitches, change the values of memory switches: P18, P19, P25, P26, P32, P33, and P77.
* Refer to ④ , ⑤ , and ⑥ for further information.
Memory switch No.
P45 BT holding Duty setting
P74 BT off redrive waiting time
P75 BT off redrive time
P76 BT suction time
P149 BT inital pause Duty setting
P150 REVERSE signal off time
P168 BT initial suction time
P169 BT initial pause time
P170 BT off redrive Duty setting
No.76
No.168 No.169
Duty No.149
Initial value
200 [ms]
Duty No.45
30 [%]
3 [ms]
70 [ms]
50 [%]
2 [ms]
25 [ms]
40 [ms]
10 [%]
– 102 –
No.150 No.74 No.75
Duty No.170