Troubleshooting: regular ripples on the surface especially on the walls

[william0000]

Dear guys,

we are trying to DIY one of the FDM 3D printers by ourselves but it seems that the sample is not good.

U will see the regular ripples on the surface by our hardware and firmware. However, we just modified the sailfish firmware a little bit.

It spends ur several months to solve this problem but failed, so we'd like to know it there anybody face it before and how to solve it or any suggestion?
QQ???????.jpg

[3dkarma]

It looks like you're under- or over-extruding. Have you calibrated e-steps/mm and played with width over thickness / extrusion multiplier?

[Black Rabbit]

It could also be due to vibrations of motors or belts (belts too tight perhaps?)
good luck!

[Geoff]

Dear guys,

we are trying to DIY one of the FDM 3D printers by ourselves but it seems that the sample is not good.

U will see the regular ripples on the surface by our hardware and firmware. However, we just modified the sailfish firmware a little bit.

It spends ur several months to solve this problem but failed, so we'd like to know it there anybody face it before and how to solve it or any suggestion?
QQ???????.jpg

Lower the temperature slightly and also tighten your bolts, usually a wobble vibration issue.

[brainscan]

If your z nut traps are locked to the x smooth rods like with a mendelmax you will get regular ripples caused by the z screws. Mutleys mendelflex put the z nuts on their own bushings and fixed this. Sorry if this doesn't help.

[jimc]

That is a real common issue. Some printers are worse than others. Its a resonance wave. A change in direction causes a wobble or frequency to travel through the hardware. Very difficult to get rid of 100%. Almost all printers will do it to some small degree its just a matter of how bad. As recommended by the other guys here the first thing you need to do is make sure everything is solid and tight as possible. Second, go into the firmware and reduce the acceleration for the x and y axis.