Coupling table
Configuration menu for configuring coupling factors between single axes (axis) and joint axes (joint). The coupling ratio indicates how much impact a single axis has on a joint axis that is not directly assigned to it, which means that it does not have the same index. If there is no coupling, you can set the number of couplings to 0. If you set the couplings to greater than 0, a table will be displayed showing one row per coupling. For each coupling, you can set the single axis, the joint axis and the gear ratio.
Example
If single axis 4 rotates by 20 °, only the joint axis 4 would rotate by 20 ° when coupled with single axis 4, joint axis 5, and a (only theoretically possible) gear ratio of 0. However, if the gear ratio is 1, for example, both joint axis 4 and joint axis 5 rotate by 20 °. Joint axis 5 is additionally rotated by the value of single axis 5.
Couplings between the axes are implemented, for example, using parallelograms or belt constructions. The hand axes of typical ARTICULATED arm robots are also usually coupled.
If, for example, on a SCARA RR M10 the elbow motor (drive 2) is mounted on the shoulder axis (joint 1) and the movement is transmitted to the elbow (joint 2) by means of a parallelogram or belt with belt pulleys of the same size, the following coupling must be set: Single axis 1, joint axis 2, gear ratio -1.
If the number of couplings is > 1, the joint axis parameter must be greater than the single axis parameter of the same coupling. Furthermore, the single axis parameter of a coupling must not be smaller than the single axis parameter of a preceding coupling, i.e. coupling entered further up in the coupling table. Reference the coupled single axes in ascending order. The preceding coupled single axes must be in zero position when referencing a single axis.
Parameterization
Parameter | Description |
---|---|
Couplings | |
Number of couplings | Number of couplings If set to greater than 0, the coupling factor table is displayed with the columns "factor", "input index" and "output index". |
Single axis | Single axis from which the coupling is to take the position value. |
Joint axis | Joint axis from which the coupling is to add the position value of the single axis (weighted by this factor). |
Gear ratio | Factor with which the position value of the single axis is weighted before the position value is then added to the joint axis. |