1. Industrial Location Guidance (ILG)
2. Configuration
3. Working with Configuration Mode
4. Tightening Positions Page
5. Programming the Tightening Processes
6. Creating a Workpiece
7. Compensation for Variable Workpiece Location: Referencing Strategy

Compensation for Variable Workpiece Location: Referencing Strategy

In many situations, the workpiece to be processed is located in a location which is not the one that the model - created, for example, after teaching the tightening positions - assumes. Those situations can occur because of the setup of the assembly line, or because of the operation made on a movable table. It is possible to configure ILG software to compensate the variable workpiece location compared to the ILG system, depending on the application.
The compensation functionality is called Referencing.

ILG software gives different options to set up the Referencing:

• Static: the workpiece is introduced in the same location every cycle.
  All the Reference Positions boxes on the Advanced tab of the Workpiece Properties dialog box must be empty.

• 1-Point Referencing: the part is introduced in different linear locations. 1-Point Referencing let the part translate linearly across any axes: X, Y, or Z.
  A typical example is the assembly line, where the workpiece stops on the station in slightly different positions.
  To use 1-Point Referencing for the given workpiece model, enter the ID of 1 tightening position defined for the workpiece as the Reference Position 1 on the Advanced tab of the Workpiece Properties dialog box.
  Thus, before any other operation on the workpiece, the operator must pull the tool trigger on this particular position.

• 2-Point Referencing: the part is introduced in different linear locations and rotated around one axis.
  A typical example is when the workpiece gets at the ILG station on a movable table.

  To use 2-Point Referencing for the given workpiece model, give the axis around which the rotation is expected. Then, enter the IDs of the 2 tightening positions defined for the workpiece as the Reference Position 1 and Reference Position 2 on the Advanced tab of the Workpiece Properties dialog box.
  Thus, before any other operation on the workpiece, the operator must pull the tool trigger on these particular positions in the specified order.

• 3-Point Referencing: the part is introduced in different locations along all axis. 3-Point Referencing let the part translate linearly and rotationally across any axes: X, Y, or Z - all 6 degrees of freedom.

  To use 3-Point Referencing for the given workpiece model, enter the IDs of 3 tightening positions defined for the workpiece as the Reference Position 1, Reference Position 2, and Reference Position 3 on the Advanced tab of the Workpiece Properties dialog box.
  Thus, before any other operation on the workpiece, the operator must pull the tool trigger on these particular positions in the specified order.

Setting Up the 3-Point Referencing Strategy

Setting Up the 3-point Referencing Strategy procedure works best if the 3 points are as far apart as possible in both coordinates of the geometrical plane.

If a reference strategy is used for a workpiece, the process always starts with the referencing. At the beginning of the process, only the reference points on the workpiece appear. Only after the operator has captured all reference positions, the fastener positions are displayed and can be fastened.