APPENDIX C: SYSTEM TIMING
CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
990-430
C-3
Relay Timing
Definitions
D4
Delay time from the end of
HOLD
time until the
END OF WELD
or
ALARM
relay turns on. This
time is 25ms or less in most cases. However, if the energy remaining in the capacitor bank at
the end of pulse 2 is greater than the energy required for Pulse 1 of the next weld, the unit will
discharge the capacitor bank to the proper energy level. The end of weld relay will be delayed
until the proper energy level is reached.
D5
Duration of the
END OF WELD
relay. This is from 100 to 125ms.
D6
Delay time from the end of the weld pulse until the
OUT OF LIMITS
relay turns on. This time
can be up to 300ms.
D7
Delay time from the end of
HOLD
time until the
COUNTER EXCEEDS LIMIT
relay turns On.
This time is from 100 to 500ms.
