HP Designjet 250c Service Manual - Page 45

During sheet media loading, the plotter: 0 Detects the front edge of the media. (Media sensor located before pinchĆarm stops.) 1 Grips and advances the media. 2 Moves the media forwards and backwards to check whether it is still present and correctly gripped. 3 Advances the media and rechecks media presence. (The loading process fails if the media sensor detects no media.) 4 Actuates the bail so that the media can advance under it. 5 Moves the media to a given absolute position. 6 Again moves the media forwards and backwards to check for its presence. (The loading process fails if the media sensor detects no media.) 7 Moves the carriage to sense the right and left edges and to check dimensions. 8 Advances the media six inches. 9 Checks the right edge of the media for skew (misalignment). (The loading process fails if the skew is greater than the allowed limits.) 330 350C 10 If the media is slightly misaligned, the plotter gives you the opportunity to realign it. After realigning, the right edge of the media is checked again for skew (misalignment). (The loading process fails if the skew is greater than the allowed limits or if the aligned media is too far away from the load line.) 11 Advances the media until the media sensor detects the end of the media. 12 Checks the position of the right edge of the media. 13 Extrapolates the skew to the upper and lower edges of the media. 14 Calculates the media dimensions: print margin, length and width. 15 Moves the sheet to the printing position and resets the mediaĆaxis servo position. C4699Ć90000 Functional Overview 5Ć3