Hi,
I’m new to Carmaker and have run into some errors that I’d like some help with. I was running IPGKinematics on the rear suspension geometries provided for the LTS 2026 competition and noticed a consistent warning during kinematic simulations (see photo below):
“Parameter: Point Bushing Center X = wrong!”
Looking into this, the issue seems to be that the parameter-defined coordinates differ from the geometry used internally (usually ~10 mm in Z). In graphical analysis, the suspension uses the geometry values, not the parameter values.
This behaviour appears across the few geometries I tested:
R2_CP0_TP0.kin
R3_CP0_TP0.kin
R4_CP0_TP0.kin
R5_CP0_TP0.kin
I have a few questions:
-
Doesn’t this mismatch affect the simulation results (e.g. roll centre movement, camber gain, etc.)?
-
Are the parameter coordinates effectively ignored in favour of the geometry coords?
-
Is this expected behaviour for these models, and can the warning be safely ignored?
I want to make sure I’m interpreting the suspension geometry correctly before using the results for further analysis.
Thanks in advance.
