Used 6-Axis Robots for Sale

A 6-axis robot is an articulated arm with six rotary joints, so the hand can approach a mold, a box or a fixture from angles a straight beam cannot. It stands on the floor, on a riser or on the machine, and it is programmed as a path rather than as three linear strokes. A sprue picker is not this arm. A Cartesian servo over the clamp is not this arm either. Reach on the plate is measured to the wrist, and a long gripper eats that radius. Payload includes the tool and the dress pack, not only the part. Demolding, insert loading and packing are the jobs the arm does in a molding cell. An articulated robot and a floor-mounted robot are shop names for the same six-joint machine.

Joint speed, and the postures where the arm loses a clean path, explain why a pretty reach number can still miss the cycle. The hand has to enter the press guard, take or place a part, and get out before the mold closes or the next box moves. A collaborative arm and a fenced industrial arm are different safety stories. Universal Robots' UR10e, one common collaborative size, is rated about 12.5 kg and about 1300 mm of reach, with pose repeatability around 0.05 mm. It is built to work near people only when the safety setup is real. Fanuc's heavy six-joint frames run to several hundred kilograms and reaches past 2.8 m, which is a packing or machine-tending envelope, not a sprue pull. Dress packs and cable life are the wear you will actually buy parts for. The wrist has to carry the tool without rubbing the mold.

The base sits beside the press or at the end of a conveyor, not across the tiebars the way a traverse does. A servo beam is the faster top-entry takeout when the part only needs to come out and drop. A sprue picker is enough when the only goal is the runner. This arm earns the floor space when the path includes inserts, a trim fixture or a box the beam cannot reach. Guarding and the press interface belong in the plan. An arm with no signals to the press is a mechanism, not a finished cell. Buying a 6-axis robot for a runner you could swing out is extra joints you still have to master.

Cells that added packing or insert work unbolt the arm and leave the fence behind. On a used 6-axis robot, master it, jog every joint and feel the wrist for play. A dead encoder or a loose wrist will hit a mold. Flex the dress pack through the real path. Read hours and alarms if the controller still shows them. Ask whether the gripper and the press signals are included before you draw a guard around a reach you have not taped out on the floor.