
APPENDIX D: SYSTEM TIMING
HF28 DC RESISTANCE WELDING SYSTEM
D-4
990-372
Basic Weld Operation: Air Head System with Two-Level Foot Switch
Definitions
T1
Delay time from Foot Switch Level 1 closure to Weld Force start. Maximum delay time
is 1 ms plus switch debounce time. Switch debounce time can be set to none, 10, 20, or
30 ms with the
SETUP 1
menu screen.
T2
Soft touch time.
D1
Delay time from Foot Switch Level 2 to Firing Switch closure. Maximum D1 time is 10
seconds. If the firing switch does not close within 10 seconds, the message
FIRING
SWITCH DIDN’T CLOSE IN 10 SECONDS
will be displayed.
D2
Delay time from Firing Switch closure and Foot Switch Level 2 closure to squeeze time
(SQZ). Maximum D2 time is 2 ms plus switch debounce time.
SQZ
Squeeze time. Selectable range is 0 to 999 ms. Note that for SQZ to start, Foot
Switch level 2 must be ON, Soft touch time must be complete and the firing switch must
be closed.
UP
Up slope time. Selectable range is 0.0 to 99.0 ms.
WELD
Weld time. Selectable range is 0.0 to 99.0 ms.
DOWN
Down slope time. Selectable range is 0.0 to 99.0 ms.
COOL
Cool time: Selectable range is 0.0 to 99.0 ms.
HOLD
Hold time. Selectable range is 0 to 999 ms.
Summary of Contents for 1-288-01
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