Gullco GP-250 - Manual (Page 5)

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AUTOCYCLE WELDING POSITIONER
This parts list covers the operation and maintenance requirements of the following Gullco
AutoCycle welding positioners:
GP-250-M, GP-250-H, GPP-250-M, GPP-250-H, GP-350-M & GP-350-H
GENERAL DESCRIPTION
The Gullco AutoCycle welding positioners are electrically powered, rotary turn tables, that consist of
a rotary spindle complete with mounting flange, drive and tilt mechanisms, a microprocessor based,
pulse width modulation motor control and a 7-1/2 feet (2.3 mtr.) power cable and a range of options,
as detailed on the following pages. The positive drive of the rotary table is obtained from a single
stage chain and sprocket reduction, driven by a low voltage permanent magnet motor and gear-
head power unit assembly. The microprocessor motor control offers operator interface of start,
stop, clockwise rotation, neutral, counter-clockwise rotation and infinitely variable control of the
speed, within the range of the model, as well as an L.E.D. display indicating rotational speed in
revolutions per minute and operational status. The GP-250, GPP-250 & GP-350 series of
AutoCycle welding positioner provides programmable automatic welding cycles (including stitch
welding) and through the use of optional equipment can interface with such items as welding trigger
signals, pneumatic gun positioning slides, manual activation footswitches, and gas purge solenoids.
Safety is greatly enhanced by the use of Gullco's low voltage (24 V) control and power supply
system that is available in three line voltage inputs. I.e. 42, 115 and 230 VAC, single phase, 50/60
Hz, or any unregulated 24 VDC power supply at 220 watts of power. A power supply on/off
isolation switch is provided. The rotation speed is electronically controlled using an optical
tachometer located on the back of the gear-motor and is infinitely variable in both clockwise and
counter-clockwise directions, within the range of the model, by a rotary speed adjustment encoder
located on the remote control faceplate of the AutoCycle welding positioner. Table tilt is manually
set at any desired angle, from 0º through 90°, quickly and easily.
Purge equipped models have a 1/4" (6.4mm) hole through the center of the table spindle and a
rotary gas coupling mounted to the rear of the spindle, providing a female 1/4" N.P.T. gas inlet port.
INTENDED / FORESEEN USAGE
Gullco AutoCycle welding positioners are widely applied to reduce the cost of welding
circumferential components, such as pipe flanges and fittings. They are compact, portable and
provide fast positioning and smooth rotation.
Through automation or semi-automation, the quality, efficiency and repeatability of the weld
produced is greatly improved. Detrimental factors such as poor or awkward accessibility, operator
fatigue, or inconsistent workmanship are eliminated. Required quality levels are consistently
attained and productivity and profitability increased.