Gullco GP-250 - Manual (Page 9)

7
Automatic Operation
This section refers to parameter settings and values. Details of accessing and changing these
settings and values can be found later in this manual under the section “Programming The
Automatic Cycle Parameters/Variables”.
To toggle between automatic mode (Aut) and manual mode (Hnd), place the Run/Stop switch in the
Stop position and press and hold the Cycle Push Button until the desired mode is displayed (Aut or
Hnd).
In Automatic mode (Hnd) the Preset Cycle L.E.D. located in the lower right hand corner of the
display will be constantly illuminated.
In automatic mode (Aut), every time the Run/Stop switch is placed in the Run position (and the
Forward/Neutral/Reverse switch is in the Neutral position), the programmed automatic cycle will
execute. The optional Start/Stop footswitch is totally ignored in automatic mode. The turntable
welding speed will be set by the Speed Adjustment knob.
If the Run/Stop switch is placed in the Stop position at any time during an automatic cycle, the
automatic cycle will perform a controlled, sequential shut down as described from section 1-12 or 2-
12 depending upon the setting of the programmable Weld Cessation parameter (P. 9).
The automatic cycle is initiated by placing the Run/Stop switch in the Run position. If the
programmable Weld Cessation parameter (P. 9) is set to “2” the automatic cycle will continue as
described in section 2-1 to 2-14. If the Weld Cessation parameter (P. 9) is set to “1” the automatic
cycle will proceed as described in section 1-1 to 1-14.
1. Programmable Weld Cessation (P. 9) = “1” (typical for Mig applications).
1-1. The optional gun slide solenoid relay (connected to CN82 of the GSP control) will be
energized and the programmable Gun Slide Extend Delay (P. 1) timing cycle will
commence. This allows time for the optional pneumatic gun slide [GP-175-030] (where
applicable) to position the welding gun before activating the arc.
1-2. Upon completion of the Gun Slide Extend Delay (P. 1), the optional arc signal relay [GK-
191-P-071] (connected to CN81 of the GSP control) will be energized and the
programmable Rotation Start Delay (P. 2) timing cycle will commence. This provides time
for any pre-flow function as well as allowing the arc to establish prior to commencing the
weld motion.
1-3. Upon completion of the Rotation Start Delay (P. 2), the weld rotation will start to travel in
the forward direction at the speed set by the Speed Adjustment knob.
1-4. If the programmable Stitch Weld parameter (P. 6) is set to Off (continuous weld), the cycle
will continue as described in section 1-12. If the Stitch Weld parameter (P. 6) is set to On
(stitch weld), the cycle will continue as described in section 1-5.
1-5. The weld rotation will stop when the angular rotation reaches the initial value set in the
programmable Stitch Weld Angle parameter (P. 7) or every time it reaches the sum of the
initial Stitch Weld Angle (P. 7) value plus the accumulative sums of each Stitch Weld
Angle (P. 7) and No-Weld Angle (P. 8). The programmable Crater-Fill/Slope-Out Delay
(P. 4) timing cycle will commence. When the programmable Weld Cessation variable (P.