Instruction manual

EFKA AB221A/AB321A + AB222A/AB322A (BA)

030 = 4: Function as with parameter 030 = 1, but remaining stitches will be displayed.

030 = 5: Function as with parameter 030 = 1, but remaining stitches will be displayed.

030 = 6: Function as with parameter 030 = 1, but remaining stitches will be displayed.

Getting the bobbin thread monitor ready for operation:

• Insert a full bobbin.

• Press the selected external key, or the appropriate key on the connected control panel (key 8 on the V820).

Set counting to the value determined by parameter 031.

The symbol stops blinking, and the message "A7" on the control will be switched off after trimming.

9.21 Bobbin Thread Monitor (Modes 20 and 25)

This bobbin thread monitor can be operated at a voltage of 15V.

Function with or without control panel Parameter

External bobbin thread monitor Off / with stop after stitch counting / without stop (UFw) 035

Remaining number of stitches for bobbin thread monitor (cUF) 036

Light barrier input 2 of Juki bobbin thread monitor / connection to socket ST2/11 (in2) 241 = 57

Light barrier input 1 of Juki bobbin thread monitor / connection to socket ST2/13 (in9) 248 = 57

External Enter key after replacing the bobbin / connection to socket ST2/14 (i10) 249 = 19

Set the number of stitches for the bobbin thread stitch count using parameter 036, or key +/- if using a V820 control panel,

after pressing key 8.

After recognizing the signal on input in2 or in9, the stitch count is started and the remaining stitches are displayed on the

control panel. After this count, the following alerts will be issued:

 The bobbin symbol blinks on the V810/V820 control panel.

 The external LED connected to socket ST2/23 blinks.

 The acoustic signal is issued on the control panel if parameter 127 is set to “1“.

The “Enter“ function can be performed using the external key on socket ST2/14 (parameter 249 = 19) or the F1/F2 key on

the V810/V820 control panels (parameter 293 or 294 = 19) or key 8 on the V820 control panel (parameter 292 = 1 or 2).

The process is influenced by the setting of parameter 035.

035 = 1: The drive stops in the pre-selected basic position. The sewing process is blocked, and pedal in pos. –2 is possible

until the Enter key is pressed. After pressing the Enter key, sewing is possible up to the seam end. At the seam

end the bobbin must be replaced. The sewing process is enabled after pressing the Enter key once more, and the

alerts will be disabled.

035 = 2: The drive does not stop, and sewing is possible up to the seam end. At the next start of the seam the bobbin must

be replaced. The sewing process is enabled after pressing the Enter key once more, and the alerts will be

disabled.

9.22 Thread Trimming Operation

Function with or without control panel Parameter

Thread trimmer On/Off (FA) 013

Thread wiper On/Off (FW) 014

Function with control panel V820

Thread trimmer or thread wiper On/Off Key 5

When a V820 control panel is connected, the functions can also be switched on and off using key 5.