stick out

[hagsy]

We have a problem on some of our panasonics where when they have finished welding there is nearly no wire protruding from the tip and when it goes back into weld it nearly no arcs because it is waiting for the wire to feed and make contact with the joint.  Any help would be appreciated.

[Lex]

Hello,

Try to adjust the wire lenght after welding with the seq comm: burn back time.
Its settable in your program as a command or as default in your welder.

[hagsy]

Thanks Lex but could you expand a little on that as have only been using panasonic for a few months. Thank you

[achencan]

1.  Try to adjust the wire lenght after welding with the seq comm: burn back time.
    But we don`t know your system. What controller and welder?

2.  Try to increase crater welding current or decrease  crater welding voltage.

3.  If the ArcEnd program have these comm :   AMP = 150
                                                                     WIRERWD ON                 
                                                                     DELAY 0.10
                                                                     WIRERWD OFF
Try to adjust the wire backward feed speed (AMP) or time(DELAY)

4.  Add  these comm at the end of ArcEnd program :   AMP = 200
                                                                               WIREFWD ON                 
                                                                               DELAY 0.50
                                                                               WIREFWD OFF 

5.  Add the WIREFWD.prg after welding.

[Lex]

Hello Hagsy,

See message from achencan :-)
Controller en welder type is needed for more specified details.
Let me know!

Lex

[hagsy]

Its YA-1QAR81 series robot and the YA-1QAR series controller. Thanks again.

[Lex]

Ok,
Lets try:

Open a welding program and put in the first line the seq command:ADJRST (its restore the welding fine adjustments) and then BBKTIME (wich adjust the burn back time)
You can put a value + or -.
Try first - 10
Try welding and try some other values.


If the ArcEnd program wich you are using have these comm : 
                                                                     AMP = 150
                                                                     WIRERWD ON                 
                                                                     DELAY 0.10
                                                                     WIRERWD OFF
Try to adjust the wire backward feed speed (AMP) or time(DELAY)

Add  these comm at the end of ArcEnd program wich in use in your program :
                                                                               AMP = 200
                                                                               WIREFWD ON                 
                                                                               DELAY 0.50
                                                                               WIREFWD OFF 
You can also put the BBKTIME command as default in your system in your welding machine.

[achencan]

That is TAWERS.
to adjust the BBKTIME value for all weld : Set -> Arc welding -> welder -> Wave adjust data -> Start/End

see the picture

[hagsy]

Great stuff, will let you know how it goes.

[hagsy]

Never had a chance to check the settings you gave me in reference to the stick out problem but i did manage to have a look at a panasonic that runs fine at another factory and its settings are exactly the same as ours but they dont have the same problem, one of there maintenance staff mentioned that we needed to put the arc end schedule 6 or 7 at the arc ends to address the wire stickout problems, does this make any sense to you Lex or achenen. Thanks again in advance.

[achencan]

Wire auto retract function ?

from the manual : 
To use the “Wire auto retract”, specify the stick release
number 6 or 7 in the Arc-OFF command. Then the wire
will be automatically rewound the wire automatically to
shorten the wire extension to proper length after the
completion of welding operation. Therefore, the wire can
easily get ready at the next arc start point.
[Stick release]: Specifies a stick release condition (0-5)
Wire rewind condition:
[Current]: Coefficient of motor revolution (0-999) A
[Time]: Motor retraction time (0.01 ～ 2.00) s

[hagsy]

That makes sense, thank you. Will let you know what happens when i get the chance to get back to that particular weld cell as they are putting new jigs on at the moment.