Conceptual Modeling of Robot Design: Creo Webinar 2
Week 6 of PTC Robotalk 2012 focused on Conceptual Design using PTC Creo. Jordan Cox prepared a video demonstrating the use of Creo Parametric to construct a dynamic 3-D concept model using "block parts" rather than material from the FRC kit of parts. The demonstration focused on the task of lifting and placing tubes on a rack, much like the 2011 Logomotion competition. Here is the video:
Constructing a model such as the proto-robot in the video requires a basic understanding of 3-D modeling using Creo. Yet, the dyanmic model that results from using a few basic sketches and extrudes and combing parts with a few basic assembly constraints provides a powerful starting point for conversations about designing motor assemblies, game strategies, and mechanism design. Emphasizing this point, Robotalk panelists Mark Fischer and Chris Hartmann conveyed their experiences working with teams in prior seasons. Using Creo to build conceptual models can provide team members with a more concrete vision of the final design while helping to establish important design requirements.
For those who wish to explore the concept design robot in Creo, the part files and the conceptual robot assembly are available for download in the .zip file at the bottom of this blog post.
Using Mathcad in Concept Design
After Mark Fischer demonstrated the concept model using Creo Parametric, Chris Hartmann showed a PTC Mathcad worksheet with torque and speed calculations for a robot arm based on the concept model. The worksheet is also contained in the attached .zip folder. The purpose of this worksheet was to assess a selected motor to see if it would provide sufficient torque and lift speed in an FRC competition. Combining Creo and Mathcad in this way can reduce the time-loss and frustration that results from build & break design practices. While the use of Creo and Mathcad during concept design cannot guarantee success in regional competition, they can certainly save time during build season. Moreover, capturing the design intent and requirements using Mathcad, Creo, and PTC Windchill creates reusable intellectual property that can be leveraged by your team in future seasons. Never again find yourself having to reverse engineer your old bot to design your new one!
Next week's Robotalk Session
Assembling a detailed model of your FIRST robot in Creo Parametric