Which Compact RIO Chassis and Controller for 3 axis control

[Rodj]

I agree with Jochen's recommendation. I think this will be the best method. Also the spline coefficients are not what you listed. To simplify the math on the FPGA side of the spline engine, we do some pre-calculations on the RT side. Thanks, Rodger

[paubine]

Thanks for all you help.

I finally realized the project... I understood how the spline engine is working and I'm working with it... Controlling all the system via the RT.

The control is working like the TG (an other case added in the loop)  but customized reading the value of the master count and sending the new setpoint via spline engine...

Easier to program the math and edit the function etc... the FPGA has only the spline engine...

And yes.. the 4 points are as I mentionned but transformed with the matrix given is the spline engine help and what is sent to the spline engine are U32.U32 ..blabla.. wasn't easy to understand... but finally I did.

Thanks again

Patrick