'Converting dataframe to numpy I loss data?

I've a dataframe dataframe_as. It starts from index 1776 and ends to index 130196, also he has 3 cols (speed, acceleration and time).

Now I want to convert each column in array, and to do that I use to_numpy(), for example:

speed_array = dataframe_as["speed"].to_numpy()
acc_array = dataframe_as["acc"].to_numpy()
time_array = dataframe_as["time"].to_numpty()

But I see that every new_array's size is 112251, and it start from index 0... Did it lost some data?

python pandas

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