Building Motion and Control for MPS Station Model in SiemensNX

I worked on analyzing and defining the motion and control system for the MPS (Modular Production System) model. The goal was to break down the system into manageable sections, define how the components move, and establish control mechanisms for actuators.

Evaluating the MPS Model

I started by evaluating the MPS model to understand how different elements interact and move. This involved:

Identifying actuators and their corresponding motions for various components.
Understanding how each station operates independently and as part of the entire system.

This evaluation provided a clearer view of how motion and control should be structured.

Breaking the Model into Individual Stations

Rather than working on the entire model at once, I decided to first work on each station separately. To keep things organized, I categorized them into three key functional areas:

DISTRIBUTION – Responsible for feeding parts into the system.
PICK AND PLACE – Handles moving components between stations.
SORTING – Organizes and separates components based on defined criteria.

This segmentation made it easier to define and implement motion constraints for each section.

Adding Joints and Position Control to Define Motion

I determined the necessary connections between components for each station based on their function and movement requirements. I then added the appropriate joints in Siemens NX, ensuring proper constraints and motion limits:

Fixed Joints – For static components that do not move.

Hinge Joints – For rotational movement, such as robotic arms or pivoting components.

Sliding Joints – For linear movement, like pneumatic cylinders and guided tracks.

Ensuring correct motion limits was crucial to prevent unintended interactions and maintain accuracy in the digital twin.

The next step was integrating Position Control and Signals for actuators, allowing seamless control via the TIA Portal. For each actuator, I created:

TWO position controls – Defining start and end positions.
Corresponding signals – Each actuator now has signals for both positions (ON/OFF or Active/Inactive), ensuring precise control during operation.

Conclusion and Next Steps

Today’s work helped structure the MPS station into modular sections, ensuring each station’s motion was well-defined and controlled. By setting up joints and actuator position control, the system is now ready for further automation and simulation testing. The next phase will focus on integrating these controls into a fully functional digital twin with real-time PLC interaction.

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