Skip to main content

Robot type · Gist Point

7, 8 and 9-axis robots

A robot that travels or hangs to reach end to end on parts several meters long.

Ideal for: Welding beams, columns, trailer chassis and long or tall steel structures.

Total axes
7–9
The robot travels
Rail
The robot hangs
Gantry
The part turns
Positioner

What sets it apart

Why choose this robot

A 7, 8 or 9-axis robot is almost always a 6-axis robot with external axes that the controller moves in coordination: a rail that carries it along the part, a gantry it hangs from, or a positioner that turns the part while it welds. It is the configuration used for beams, trailer chassis, columns and structures that do not fit within a fixed robot's reach.

More reach

The rail or gantry carries the robot along the whole part.

Better position

The positioner turns the part so it always welds flat or at a comfortable angle.

Coordinated motion

The controller moves the external axes together with the arm, as one robot.

Two stations

While it welds one part, the next is loaded: the robot does not wait.

What it is used for

Typical applications

  • Welding beams, columns and steel structures
  • Trailer and agricultural machinery chassis
  • Tending several machines or stations with one robot
  • Welding with the part turned to the best position

It can

  • Weld parts that do not fit within a fixed robot's reach.
  • Turn the part to weld seams on every face.
  • Tend several machines or stations with the same robot.

It cannot

  • Compensate on its own for badly fitted parts: it needs tracking or vision.
  • Be installed without room for the rail or gantry and its travel.
  • Be chosen without simulating the largest part to be welded.

Real equipment

Examples we integrate

What makes a robot industrial
Robot hanging on a rail
Robot hanging on a railThe robot works upside down from a carriage that travels along the part: it welds beams end to end.Manufacturer:
Column and boom on a rail
Column and boom on a railRises, lowers and travels with the robot at the tip to reach tall and long parts.Manufacturer: Pioneer
Gantry on a rail
Gantry on a railThe robot hangs from a travelling gantry: it covers wide parts without moving them.Manufacturer: Hwashi
Cell with two positioners
Cell with two positionersWhile the robot welds on one side, the operator unloads and loads the part on the other.Manufacturer: Hwashi

Photos from manufacturers we work with. Model, configuration and availability are defined in each project. The configuration (rail, gantry, positioner and travel of each axis) is defined by the part size and validated with a simulation before quoting.

Guides

Guides on 7, 8 and 9-axis robots

View all guides

Other robot types

Next step · Gist Point

Is this the robot for your process?

Tell us what you want to solve and we will tell you which equipment fits and how it integrates with your plant.