Blobs, Zits and Open Seams on Surface

Surface defects such as blobs (droplets) and zits (spots) are most common aesthetic problems:

🔵 Blob (droplet) on surface:
• Forms where nozzle starts or ends perimeter
• Cause: Excess material from retraction or ooze
• Solutions:
  – Enable Wipe before retract (wiping reduces pressure)
  – Increase retraction distance by 0.2 mm
  – Lower nozzle temperature by 5 °C
  – Seam position: Scattered (random seam distribution)

⚪ Zit (spot/pimple):
• Forms when nozzle enters perimeter from infill
• Cause: Over pressure in nozzle after infill movement
• Solutions:
  – Enable External Perimeter First
  – Wipe distance: 0.1–0.3 mm
  – Lower temperature or pressure advance value

🔴 Open seam (open line):
• Visible gap where perimeter loops closes
• Cause: Insufficient extrusion at perimeter start
• Solutions:
  – Seam Overlap: 10–15%
  – Increase Extra Perimeter Start Flow: 5–10%
  – Check e-steps and flow rate calibration

💡 General tip: • Test one change at a time • Save profiles for different materials separately