robot joint offsets required to overcome internal absolute encoder

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4 years 2 months ago #249836 by ftree
this error out and shuts down

net :j1 <= a2-pos-fb-comp => pyvcp.joint1 => meca500gui.joint2

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4 years 2 months ago #249837 by ftree
hi andy, i'm trying to set this up in sim mode. maybe going about it all wrong way.

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4 years 2 months ago #249839 by ftree
kinematics fail using offset, back to the drawing board

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4 years 2 months ago - 4 years 2 months ago #249840 by ftree
We need a way to add back into the system the "theta" values for following so the robot poses correctly in sim and kinematics work correctly.

theta j1= neg 90
theta j5 = pos 180

I am open to guidance on how to achieve this in both sim and real.  Thanks!
Last edit: 4 years 2 months ago by ftree.

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4 years 2 months ago - 4 years 2 months ago #249861 by Aciera

We need a way to add back into the system the "theta" values for following so the robot poses correctly in sim and kinematics work correctly.

Maybe try the "HOME" or "HOME_OFFSET" values in the [JOINT_n] sections or the "HOME" values in the [TRAJ] of the ini file to compensate for those theta rotations.
The simulation model needs to reflect any joint rotations that were made to accommodate the lack of theta values in genserkins dh-parameters.
 
Last edit: 4 years 2 months ago by Aciera.

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4 years 2 months ago #249869 by andypugh
You might need to rotate the parts before linking them to the HAL pins in the Vismach model.

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