Under extrusion -> Cloged -> Serious wobbly layer

[anicaric 0]

Hi! guys,

I'm always grateful for your kind help in this community.

My 'Ultimaker 2 Extended' was not so bad one week ago.

but, it have under extrusion problem for a few days ago.

and Now it has serious wobbly layer problem.

I have been using '3d universe brown PLA' with this setting.

 

Layer height (mm) : 0.05

Shell tihkness (mm) :  1.2

Fill Density (%) : 10

Print speed (mm/s) : 35

Nozzle size : 0.4

All the rest are default option.

 

Speed : 100%

Temperature : 225C

Buildplate : 45 C

Material flow : 100%

All the rest are default option.

and also I'm using custom acrylic box to protect from cold air.

To summarise.

Not so bad (week ago) -->  under extrusion --> increase temperature 250C --> cloged

--> clean using sewing needle and Atomic method a lot

--> found some fallen strange grub screw under buildplate

--> tried to find right place for the fallen screw --> could not find yet

--> tightened every grub screws for all the axis  --> test again

--> serious wobbly surface (now)

Here are some photos that shows the steps and the problem.

Any help on the matter would be greatly appreciated.

Thank you!

Edited December 10, 2015 by Guest

[anicaric 0]

Sorry for my poor English.

Isn't there any tips you can do to help me?

I don't have any idea to fix this problem.

I have been trying to solve the problem by myself searching internet.

(Change some options for test, Try other filament, Atomic method...)

But I still could not fix the problem.

I really need any tips, any suggestions from experts like you.

Please help me...

[DidierKlein 729]

Hi,

I checked the build manual to be sure but i didn't find any other places where such a screw is used except in the pulleys (and the feeder). So if there are all in place, it's most probably a screw that was lost during production?

I'm more concerned about the black dust that you see on the X and Y motors. It looks like the belts are degrading?

On your last picture it looks like it's over extruding, did you print hotter?

[BrayChristopher 36]

Have you checked the PTFE isolator coupler yet?

If it is deformed and brown it could be squeezing the filament too tight.

Do you hear clicking from the feeder motor when it prints?

[BrayChristopher 36]

I'm more concerned about the black dust that you see on the X and Y motors. It looks like the belts are degrading?

 

My UM2E has the same "black dust" on the motors. I also assume it is from the timing belts slowly wearing.

The machine has about 1000 hours of print time on it so far.

[anicaric 0]

Thank you for your time.

I used to think the black dust from degrading belts is normal for this Ultimaker2.

but is it not normal?

and I have been using 225C for the brown 3d Universe PLA filament

and using 205C for the silver Ultimaker filament.

Do you think it is too hot?

and I have been using some acrylic box for this Ultimaker 2.

Well, Is that may be part of the problem?

Edited December 10, 2015 by Guest

[anicaric 0]

Have you checked the PTFE isolator coupler yet?

If it is deformed and brown it could be squeezing the filament too tight.

Do you hear clicking from the feeder motor when it prints?

 

I have not check the PTFE isolator coupler yet.

Becuase, I used to think it will difficult to reassemble the part properly...

But I think I'm supposed to check it.

I'm going to check it searching proper method on internet.

Thank you for your advise!

[DidierKlein 729]

Go on the support page it's full of valuable information!

Like this:

https://ultimaker.com/en/support/250-disassembly

[anicaric 0]

Go on the support page it's full of valuable information!

Like this:

https://ultimaker.com/en/support/250-disassembly

 

Thank you, DidierKlein

[BrayChristopher 36]

and I have been using 225C for the brown 3d Universe PLA filament

and using 205C for the silver Ultimaker filament.

Do you think it is too hot?

 

I also use PLA from 3D Universe.

I run it at 210C. I have had pretty great success with it.

https://ultimaker.com/en/community/17420-looking-for-a-reliable-low-cost-filament-supplier?page=2#reply-120349

 

and I have been using some acrylic box for this Ultimaker 2.

Well, Is that may be part of the problem?

 

My understanding that that you do NOT want to cover the printer when printing PLA.

PLA does not require the elevated temps to prevent warping.

Also, I have read that enclosing the chamber can make the feeder motor get hot. This heat then travels through the shaft to the knurled thing that grabs the filament. This can cause problems because PLA has a lower melt temp, so it might start to soften the PLA.

[BrayChristopher 36]

I have not check the PTFE isolator coupler yet.

Becuase, I used to think it will difficult to reassemble the part properly...

 

It is a pain in the butt. be prepared. Definitely use the blue tape to hold the housing together.

Look into buying an I2K Insulator. https://ultimaker.com/en/community/17279-i2k-insulator-duptef-couplers

[ultiarjan 1,223]

It is a pain in the butt. be prepared.

 

It's just a matter of practice... once you've done it a few times it's easy.... I'm not gone try but I think by now I can do it blindfolded

[anicaric 0]

BayChristopher and ultiarjan,

Thank you for your time and kind response.

I think it would be very helful.

I'm pretty a newbie for 3d printing.

and Ultimaker 2 was my first printer.

So I might have many very basic and silly questions.

Now I'm just curious...

Does every all the FDM printers need to replace PTFE isolator or Nozzle regularly?

(Sorry for my poor English.)

[ultiarjan 1,223]

Nozzle's don't need to be replaced regularly when you just print pla. When you start printing materials filled with abrasive particles like copper fill or bras fill or glow-in-the-dark they will wear out. It's the same on every printer.

Ptfe will wear on every printer that uses it at a certain temperature and use. You can avoid it by using a full metal head like the e3dv6 which is very nice for abs but imho does a much worse job than the um2 head on pla.

[anicaric 0]

Nozzle's don't need to be replaced regularly when you just print pla. When you start printing materials filled with abrasive particles like copper fill or bras fill or glow-in-the-dark they will wear out. It's the same on every printer.

Ptfe will wear on every printer that uses it at a certain temperature and use. You can avoid it by using a full metal head like the e3dv6 which is very nice for abs but imho does a much worse job than the um2 head on pla.

 

Ultiarjan,

Thank you for all the good informations!