Ultimaker 2 print problem! please help!!!

[tinaou0711 0]

Hi I've been experiencing this problem for the recent few prints. It looks like it's skipping layers? But some photos I found of other's skipped layer prints looks a little different.

Here's the photos of the bad prints... they seem to occur randomly? Not exactly at the same layer every print. Please help me!!

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[gr5 2,224]

Either you are getting underextrusion (40 possible causes but filament tangle most likely) or more likely you have a Z issue where it drops down.

You need to figure out if it's the Z or not. Have you noticed it drop suddenly? Best thing is print something 10mmX10mmx10mm and if you get one of those rows then good! measuer the height and if it's too tall by more than 0.5mm then that's good! you found the problem. Maybe print someting that looks like stairs with each step at 10mm,20mm,30mm - once it fails let it print one more step and measure the height.

If it is indeed the Z you need to lower the Z current and/or cool the board more (the board under the printer).

One easy way to lower Z current is to add this to your gcode:

M907 Z1000

That sets Z max current to 1000mA. I think default is around 1300ma. You can just add that to your gcode file before you print it as a test.

[BrayChristopher 36]

What kind of filament are you using?

 

Either you are getting underextrusion (40 possible causes but filament tangle most likely) or more likely you have a Z issue where it drops down.

 

I highly recommend getting yourself a free-spinning spool holder. A lot of my extruder problems went away after that. There are a TON of designs on Youmagine and Thingiverse. Also I recommend putting the spool "below" the UM2 if possible.

A $10 lazy-susan on the table or floor is another alternative. I would put some kind of weight on the spool so that it rotates instead of being pulled off the lazy-suzan.

As for the other 39 here are some of the top things I have had personal frustrations with.

- Make sure the nozzle is nice and clean. Cold pulls or atomic pulls.

- Check the PTFE coupler. Warning, it is a pain.

- Check your filament diameters

- If you are using something other than Ultimaker filament, try going back to Ultimaker filament and see if you are having the same issues. All filaments act a bit different. Some are not worth the pain.

- I would say, double check your print settings, but if something there was off, your whole print would probably be junk.

- What slicer are you using? Can you preview by layer. Might want to double check and make sure these artifacts aren't a slicer glitch.

[IRobertI 521]

One easy way to lower Z current is to add this to your gcode:

M907 Z1000

Or just change it on the printer via Maintenance -> Advanced -> Motion settings -> Current Z