Gullco GP-200 - Manual (Page 5)

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WELDING POSITIONER
This parts list covers the operation and maintenance requirements of the following Gullco welding
positioners:
GP-200-M, GP-200-H, GPP-200-M, GPP-200-H, GP-300-M & GP-300-H
GENERAL DESCRIPTION
The Gullco 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. The GP-200, GPP-200 & GP-300 series of welding positioner
can accommodate a variety of optional footswitches. 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 potentiometer located on the remote control faceplate of the
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 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.