CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430
C-1
APPENDIX C
System Timing
Basic Weld Operation: Air Head System with Two-Level Foot Switch
Definitions
D1
Delay time from Foot Switch Level 1 closure to Weld Force start. This time ranges from 10
to 70ms depending upon the debounce setting.
D2
Delay time from Weld Force start to Firing Switch closure. Maximum D2 time is 10 seconds.
If the firing switch does not close within approximately 10 seconds, the message
FIRING
SWITCH DIDN’T CLOSE IN 10 SECONDS
will display.
D3
Delay time from Firing Switch closure and Foot Switch Level 2 closure to squeeze time (
SQZ
).
Maximum D3 time is 60ms.
SQZ
Squeeze time. Selectable range is 0 to 2,999ms. Typical accuracy is +/- 20% or +/- 50ms
(whichever is greater)
Pulse 1
The timing of this weld pulse depends upon the pulse length programmed, the energy setting
and the impedance of the secondary circuit.
COOL
This time is not programmable by the user. It depends upon the energy level of the second
pulse, and ranges from 20 to 670ms on the CD-A125A and CD-A300A or up to 1,500ms on
the CD-A1000A. If no second pulse is programmed, this time period is skipped. Changing
pulse widths or polarities may result in longer cool times.
Pulse 2
The timing of this weld pulse depends upon the pulse length programmed, the energy setting
and the impedance of the secondary circuit.
HOLD
Hold time. The Hold Time is measured from the start of the last weld pulse. Selectable range
is 20 to 2,999ms. Typical accuracy is +/- 15% or +/- 50ms (whichever is greater).
NOTE:
The inputs signals (FS1, FS2 and firing switch) need to be activated for
at least 50ms
for the
Power Supply to recognize the signals.
