ProJet® x60 Series User Guide Troubleshooting the ProJet x60 Printers3dscentral.3dsystems.com 59 All Rights Reserved5/12/137.9 Part Quality Issues Bad Surface FinishThe problems behind bad surface finish on parts will be different depending on whether the rough surfaceis in the vertical plane or the horizontal plane.7.9.1 Bad Horizontal Surface FinishExplanation:A bad surface finish on horizontal surfaces is usually the result of debris buildup on the Spreader Roller.The debris sticks to the Roller and prevents it from spreading a smooth, flat layer of Core. See the photobelow (color part shown to highlight the problem).SolutionClean the Spreader Roller. See Section 6.5, ’Clean The Spreader Roller’.7.9.2 Bad Vertical Surface FinishExplanation:A bad surface finish on vertical surfaces is usually the result of either or both of these:• A problem with the print head.• A motion problem with either the Fast Axis or the Slow Axis.