Header height control system accounting for change in header pitch

A method of accounting for change in pitch angles of an attachment supported on a machine controlled by a height control system, the height control system including a height sensor mounted to the attachment, the height sensor generating signals varying in magnitude relative to a height of the attachment relative to a surface, the method comprising the steps of:

• (a) positioning the attachment at a first elevation relative to the surface;
• (b) recording a magnitude of the generated signal of the height sensor with the attachment at the first elevation;
• (c) detecting a first pitch angle of the attachment at the first elevation;
• (d) positioning the attachment at a second pitch angle different from the first pitch angle, wherein the attachment positioned at the second pitch angle is at an elevation that is:
• (i) substantially the same as the first elevation;
• or
• (ii) different from the first elevation;
• (e) recording a magnitude of the generated signal of the height sensor with the attachment at the second pitch angle;
• (f) determining a pitch angle change of the attachment between the second pitch angle relative to the first pitch angle;
• (e) determining a correction factor, wherein the correction factor is a product of the pitch angle change and a scale factor;
• (h) applying the correction factor to the recorded magnitude of the generated signal of the height sensor when the attachment is at the second pitch angle to account for the pitch angle change.