The GMFanuc Model S-420s is a six-axis articulated arm, electric servo driven robot. All six axis motions
are controlled simultaneously.
Axes 1, 2 and 3 of the S420 are driven by AC servo motors through RV reducers. The motors are directly
connected to the reducer and the driving force for the axis is supplied directly from the output of the RV
drive. This direct connection of the RV drive allows for fewer drive train members, more rigidity and
smoother motion. Wrist axes (4,5, and 6) are also powered by AC servomotors through RV reducers. The
motors are located at the rear of the third axis and transmit power to the wrist through torque tubes. The
motors are connected to the torque tubes through a set of precision high speed gears. The wrist end of the
torque tube on axis 4 is directly connected to the output of the RV drive, The wrist end of the torque tube
for axes 5 and 6 connect to the input of the RV reducer through a second set of precision gears. For all three
axes, the output of the reducer is directly connected to the axis member All six axes utilize electro-mechanical brakes at the motor side of the axis drive train.
| Capabilities: |
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Spot welding. |
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Machining loading/unloading. |
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Sealing. |
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300 ° base rotation. |
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Material handling. |
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Parts transfer. |
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Water jet cutting. |
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| Benefits: |
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Large work envelope with ability to reach overhead and behind |
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Slim arm and wrist assembly |
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Compatible with S-420i robot applications (wrist flange and envelope) |
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Proven FANUC servo drive system with fast point-to-point positioning |
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Multiple controller type and locations |
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Variety of models (S-420 family) |
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Shared features from S-420 and S-420; series such as identical tooling faceplates |
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Can reach all areas of S-420 and S-420; work envelope making replacement easy |
| Mechanical Features : |
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6 axes of motion. |
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Absolute encoder positioning and brakes on all axes. |
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300 ° base rotation. |
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2413 mm (95") reach. |
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2731 mm (107.5") vertical travel. |
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Forklift provision. |
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Slender profile. |
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Large work envelope. |
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Ability to carry additional load on axis #1 (i.e. spot weld transformer, valves, manifolds, etc.) |
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Controlled by KAREL.’ Controller. |
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Model S-420 employs heavy-duty machine tool-type construction throughout and is built to operate in the
most severe plant environments |
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Massive cast iron mounting base |
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Arm joints are anti-fricition bearing mounted. |
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Precision gear drives in 5th and 6th axes. |
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Sealed for life bearings on all critical rotating elements. |
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Safety limits switches for overtravel protection. |
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Dust-proof maintenance access covers. |
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Industrial electrical cabinets. |
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Fittings provided on all user lubricated components. |
| Drive Features : |
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Fast acceleration and deceleration |
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Precision positioning |
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No brush maintenance |
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Long service life |
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World renowned dependability of Fanuc servo drives. |
| Simple Drive Train Concepts: |
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RV drives for speed reduction on all axes. |
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Compact |
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Less friction- longer life. |
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High efficiency |
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Drives directly coupled to AC servo motors on axes 1,2, and 3. |
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Precision gear sets employed on the wrist axes. |
To request a quote online click below or call us at 1-800-7ROBOTS (1-800-776-2687 )

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