Unwanted lines on box

[Tiger91]

Whenever I print a large box, I get slight imperfections in the form of bumps on the front/back, which is in the same plane as the infill lines. I've attached a few photos and documents for reference. What causes this and how do I fix it?

[jimc]

Thats looks more like a hardware issue. excess play in the axis giving the issue.

[Tetraodon]

Problems in the extrusion feed can do this (eg spools not turning smoothly, or wrong temperatures) - generally if it doesn't show on the GCode preview, then it isn't caused by the software, and is instead a mechanical or filament issue.

[pixel3design]

You got just one problem.

TEMPERATURE.

I could bet that your printer PID is wrong and need to be recalibrated.

Look at the Z. The problem is cyclic, means that hotend reach the terminal temperature, then it became too cold to extrude correctly at the given speed.

Recalibrate the PID with:

Code: Select all

M303 E0 S200 C8

When calculated store it in the firmware EEPROM

[Tiger91]

You got just one problem.

TEMPERATURE.

I could bet that your printer PID is wrong and need to be recalibrated.

Look at the Z. The problem is cyclic, means that hotend reach the terminal temperature, then it became too cold to extrude correctly at the given speed.

Recalibrate the PID with:

Code: Select all

M303 E0 S200 C8

When calculated store it in the firmware EEPROM

I've never messed with EEPROM firmware - how do I go about doing that?