I’m working on designing a stand for a UR5e robot and I’m trying to understand the load capacity requirements for the stand. I see two sections in the UR5e user manual that appear to give conflicting or confusing information. I’m hoping someone here can help clarify the requirements.
First, section 6. Assembly, subpoint 2 says:
Mount the robot arm on a sturdy, vibration-free surface.
Verify the surface can withstand at least 10 times the full torque of the base joint and
at least 5 times the weight of the robot arm.
If I read that, and take the full torque of the base joint from here to be 150 Nm and the weight of the robot to be 20.7 Kg (i.e. 203 N), then that would mean the stand would need to support up to 1,500 Nm of torque without specifying on which axis, and at least 1,015 N of vertical force.
Then on section 6.2. Dimensioning the Stand, the following diagram and tables are provided. Here it appears Fz more or less matches the vertical force I calculated above, but the torque is about half as much in the worst case scenario Mxy and even less in the case of Mz. And this is already including a 2.5 safety factor according to the text above the table.
So this leaves me confused and wondering what are the correct load requirements, in particular in regards to torque, that the stand should be designed to support.
Any idea what are the correct requirements? Or perhaps I’m misunderstanding one of these sections and someone can help clarify which one and why?
Pablo C.