IK Behaviors Properties Dialog Box

The IK Behaviors Properties dialog box provides options for you to control that posture setting for the selected manikin.

To access the dialog box, select the Manikin Tree, Settings, IK Behaviors and define accordingly.

Gaze Contribution Ratio
This enables you to control the Gaze Contribution Ratio from the Head to the Eyes. See Manikin Data Library Manager Dialog Box, Body Motions Manager.
Upper spine
This enables you to control the movement of the spine up to the neck.
Lower Spine
This enables you to control the movement of the spine up to the neck.
Pelvis Bend
When Pelvis Bend is active, the pelvis rotates forward causing a stoop pose.
Pelvis Twist
When Pelvis Twist is active, the manikin's hip twists accordingly.
Pelvis (up-down)
When Pelvis Up and Down is active, the manikin's hip moves down (the manikin squats) as the Robot is dragged.
Pelvis Horizontal
You can move the pelvis from side to side.
Extremities, Fingers and Toes

This allows you to lock or not, the fingers and toes. Both options are activated by default. This directly locks all segments of all the fingers and toes within kinematic manipulation. This is a temporary lock, and segments only lock while resolving kinematics.

Anchors, Active or Edit

You can create an anchor to fix a segment of the manikin in a specific location in the space (3D position) while you move the manikin. When the inverse kinematics could not resolve a position with the constraint, the segment moves but the target position is available.

The concept of anchor is similar to the fix constraint except for the following difference: An anchor prevents a segment to move out of its target position to satisfy the resolution of another target. Unlike the fix constraint, no twin segment or line between the target and the segment displays because the segment never moves.

Here are the specifications of anchors:

No specific location in the space assigns to an anchor. If you move the manikin without the usage of the IK, the anchor does not have any effect like deactivation.

Anchors consider as options of IK Behaviors, and anchors affects the behavior of inverse kinematics when using the following commands:

Command Active

Forward Kinematics No

Inverse Kinematics Yes

Reach Yes

Standard Pose No

IK Behaviors options for anchors save in manikin setting.

There are 3 types of Anchors: position, direction, and frame (position and orientation).

The anchors have to be active in Ergonomics Evaluation and also in Ergonomics at Work.

The anchors can add to predefined segments, example, line of sight. The index, thumb, hand, and elbow. The ankle, and toes.

Edit Anchors dialog:

When you open it for the first time, it shows the list of segments on which you can add an anchor. After selecting a line, you can click either the first or second column to add or remove the selected anchor. When an anchor is added, its state turns on and the default type defines at Position and orientation.

Removing the anchor, the line clears except for the segment name. You can also click the third column to change the type of the anchor.

State Segment Type
On Line of sight Pointing
On Left index Position and orientation
On Left thumb Position
On Left-hand Direction

  • Change posture using Forward Kinematics, Anchors are inactive in the context of Forward Kinematics usage.
  • Change posture using Inverse Kinematics and Reach command;
    • Anchors override by temporary constraints (handles) that control the motion of the manikin. Thus, anchors follow their owner segment. Moreover, each temporary constraint overrides all anchors on this IK Chain.
    • Anchors restrain the pelvis motion of the manikin using IK or Reach mode. For example, if you try to move the pelvis in a position where the anchors cannot resolve, the manikin stops and keep a static posture. This is to avoid placing the manikin in a position where the anchors cannot resolve.
  • Change posture using Standard Pose command Anchors are active for all tabs except Hand Grasp and Elbow Joint.
  • Change location using the Robot or the Place Mode command Anchors are inactive in these contexts.