Gear is rotating wrt wrong axis in simscape multibody

I made two gears in solidworks and then exported their step. file. Then I opened simscape in simulink and connected these gears to revolute joint and then to rigid transform. I offsetted one gear to make a gear mesh and reoriented both gears to xy plane using the rigid transform. I changed one of the gear's torque to "provided by input". I then connected a constant so that that gear would rotate at a specified torque.

Now It should rotate wrt z axis but it rotates wrt x axis. How can I fix this issue?

Answer 1

[Abhishek]

Hi, just a quick clarification to better understand the issue:

• After importing the STEP file into Simscape, have you verified the orientation of the gear's local reference frame using Mechanics Explorer?
• Specifically, is the gear's rotation axis (Z-axis) aligned with the global Z-axis?
• Also, in the Revolute Joint, is the axis of rotation explicitly set to [0 0 1]?Sometimes imported geometries from SolidWorks come in with unexpected frame orientations, which can cause this kind of mismatch.

[Muhtasimul]

Hi. I fixed this issue. The orientation in solidworks was wrong. When I changed the orientation of gear rotation in solidworks to Z axis, It worked.

Thank you for clarifying. It was my first question to this forum. I'm glad I got helped.