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Tape down pink paper onto the surface to the left of the buildplate
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Start Pattern Test
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Pattern test is a visual confirmation of how the print heads are functioning and is solely for the operator
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Check for missing lines on pattern test
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If some lines are missing in a scattered pattern, print heads are still good and operational
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If multiple lines are missing from a single head/section, run a purge sequence
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Options -> Purge Sequence
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Run pattern test again, if there are still chunks missing, run through a head cleaning procedure
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If there are still issues, this will most likely indicate an issue with the print head and require a print head replacement
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