Brother Z-8550A Service Manual page 17

Memory switch No. 68 - 69
No. Initial value
68
0
69 1
<When set to stitch counter actuator>
Connect to connector P17 (OPT_SW) on the main circuit board.
• When the number of stitches displayed in the stitch counter reaches "-0", the stitch counter warning LED illuminates.
(This is the same function as the "!" con display on the operation panel.)
• When the stitch counter actuator is pressed, the stitch counter warning LED switches off and treadle operation is enabled.
(This is the same operation as when the RESET switch is pressed.)
Memory switch No. 74 - 79
No. Initial value
74 15 degrees
75 -30 degrees
76 -30 degrees
77 15 degrees
78
180 (degrees)
79 100 (ms)
<Settings for memory switch No. 74 - 77>
• When set to negative (-) settings with the initial values as a reference, the quick reverse solenoid ON/OFF timing will
become faster. If the seams are too short immediately before changing occurs, change the setting in the (-) direction.
• When set to positive (+) settings with the initial values as a reference, the quick reverse solenoid ON/OFF timing will
become slower. If the seams are too short immediately after changing occurs, change the setting in the (+) direction.
Setting range
Seam matching function during automatic backtacking
(Used when you would like seams to be accurately matched when using
automatic backtacking; No. 78 sets the stop position and No. 79 can be
0 - 1
used to change the time until restart.)
0: No stopping when material feed direction is changed
1: Momentarily stops when material feed direction is changed
Actuator (optional part) function
0: Function is disabled
1: Stitch counter actuator
0 - 3
2: Sewing speed actuator
3: Option actuator
(When set to "2", reflection pattern sewing using the sewing machine
actuator switch is disabled. Correction sewing is enabled.)
1: Stitch counter actuator
2: Reflection pattern switch
1: Stitch counter warning LED
2: Reflection pattern LED
Setting range
-345 - 345
Quick reverse solenoid on timing during start backtacking/continuous
(degrees)
backtacking
-345 - 345
Quick reverse solenoid off timing during start backtacking/continuous
(degrees)
backtacking
-345 - 345
Quick reverse solenoid off timing during end backtacking
(degrees)
-345 - 345
Quick reverse solenoid on timing during end backtacking
(degrees)
(Enabled when No. 22 or No. 26 is set to "1")
Momentary stopping position when material feed direction is changed
0 - 350
(Enabled when No. 68 is set to "1")
(degrees)
The stopping position is the angle from when the needle up signal turns on.
Momentary stopping time when material feed direction is changed
10 - 500 (ms)
(Quick reverse mechanism switches at stopping position. After the stopping
time has elapsed, sewing starts again automatically.)
Z-8550A, 8560A
3. FUNCTION SETTINGS
Setting details
Setting details
2249M
8