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Common 3D Printing Problems

Joshua Vasquez edited this page Feb 13, 2020 · 5 revisions

Problem: Oblong Prints from the top-down

The printer is printing parts that are misshaped, i.e: circles are ovals.

Possible Causes

  • Uneven belt tension. Use the Gates Carbon Drive app to measure the belt tension of each belt to ensure that they are
    • within 1Hz of each other
    • around 50Hz
  • Loose Machine hardware. Check all screws nearby moving parts and ensure that they are tight.
    • XY motor screws
    • Z axis Motor screws
    • Z axis Leadscrew screws that connect the leadscrew nut to the 3D printed bed coupler
    • all shoulder screws that are connected to idler pulleys
    • the two drive pulleys that are attached to

Problem: Inconsistent Extrusion

Print layers, or parts of print layers seem to have "gaps" of missing material that should have been extruded.

Possible Causes

  • The filament source may be jammed. Check for knots in the filament.
  • The extruder may have debris stuck inside of it. Opening a hot extruder with this problem yielded this piece of PTFE which was formed likely from stretching a tiny piece that fell off the tube. (PTFE melts at a higher temperature than the PLA being printed.)

Prevention:

  • Ensure that the filament spool is not looped over itself before installing in the machine.
  • When assembling extruders, follow the manufacturer directions exactly.
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