create a signal input time function

i am tring to make the input signal 0.075*(1-cos(pi*t)) but the output is always 1, I am using the automatic solver, what should I do?

[William Alberg]

Hello

I could not recreate the problem. But you can try to set the "Max step size" to 0.01. You can find it in "Solver details", underneath "Solver selection", where the automatic solver is selected