Section 12
Configuration
60
Roll-spot
Roll-spot welds can be used in applications where a motor drive output is required between welds. The following
example shows how this type of sequence may be implemented.
Parameter
Setting
Description
Sequence timing
Roll-spot
on
Sets roll-spot mode
Presqueeze
ms
The time for the electrodes to close onto the work piece.
Squeeze
ms
The time between the initial application of the electrode force
and the first application of welding current
Main heat
ms
The main welding current is applied
Hold
ms
Electrode force continues after the welding current has
finished
Off
ms
The time during which the motor drive operates
Current control
Main mode
P/W – CCu – CCC Operating mode of the Main heat interval
Main heat
%
The % heat used during the Main heat interval
Main current
kA
The current used during the Main heat interval
Main monitor
1
yes/no
The current can be tested between limits
Low limit
1
%
Current low limit
High limit
1
%
Current high limit
Valves
AVn
Off time
Connect the motor drive to the valve that is activated during
Off time
1
optional
Start input
1
EOS output
WAV output
AVn output
Motor output
2
Force
Current
In
te
rva
l
S
q
ueez
e
Mai
n
heat
Hold
Off
Sq
ueez
e
Mai
n
heat
Hold
Off
Sq
ueez
e
Mai
n
heat
Hold
Off
1
The weld sequence is repeated until the Start input is removed.
2
The operation of the motor output is determined by the 2
nd
stage test (Section 12
Configuration
).
The examples show how the seam weld parameters can be used in any combination to implement several
different types of weld sequence.
