Printing issues

[AvMDesign]

Hi,

I’ve run into an issue printing this model, where very long gaps appear between the print layers, but not in the first layers of the model. I’ve never seen this before and I don’t really know what caused it.

It’s the first time I use this type of filament and print this model. But I’ve printed very similar models before without any issues so my best guess is that the filament is causing it.

Hopefully someone has had the same experience before and can tell me what happened.

[Arnoldas]

Hey,

Would you specify:

• What kind of printer you have?
• What material you use?
• And what setting did you print this in?

That might help people assist you with it

Cheers

[AvMDesign]

Yes that might help

I’m using a flashed XYZ printer 1.0a with Repetier host and Slic3r. It’s ABS, 0,4mm layer thickness, no support. I did one with 60% infill (accidentally) and one with 30%, both had the same issue.

If any more settings are of interest please let me know.

[3DReneHub]

Have you ever printed with ABS before? And, do you have the same problems with for example PLA?

[3dreamprint]

It could be under-extrusion. You may want to have a look at the following link: A visual Ultimaker troubleshooting guide - 3DVerkstan Knowledge Base

Click on the under extrusion part to get a description of the main causes of such problems

It is quoted as an Ultimaker troubleshoot manual but you will find that most of the problems appear universally.

Other than that it could be the software that is actually not slicing properly the model. You may have to readjust the settings for contouring (creating the outer layer) the object. Not sure about the default XYZ software but in Cure i’ve had it corrected and solved a similar problem

[AvMDesign]

I only use ABS, never had any problems like this. It’s just the first time I use this particular filament role, its from a different brand then that I’ve used before, but that could just be coincidence.

[AvMDesign]

Thanks, I’ll try increasing my nozzle temperature to see if it has any effect.

Also gonna print the model with a different filament to see if it has the same problems.

[3DPrintedArt]

If you are using ABS and the layers you are printing are thin at all, you need to turn off fan cooling completely. When the layers are thin, the fan cools it to fast and the layers don’t adhere. Hope this helps,

3D Printed Art

[3Dscaleworks]

Ok, always check the best temp to print because color and different manufacturers have different temps

most of the time this is a typical ABS problem because of the quick cooling of of the filament.

You won’t have so much problems printing with PLA

Random you starting point per layer or increasing printspeed can help a bit also keeping a better environment temp if your printer cannot be closed by making a cover.

3greetz

John

[AvMDesign]

I think this might have been the problem, seems I checked active cooling for this print. Also makes sense because the problem is more evident on one side of the printed object.

Thank you for the reply, learning a lot

[AvMDesign]

Quick cooling seems to be the issue, I checked active cooling on, something I normally never use. Explaining the difference with previous (similar) prints.

For this object I can’t use PLA because it will be exposed to high temperatures. I also use aceton finish often so I haven’t played with PLA yet, but it does have some interesting properties compared to ABS.

Thanks for the random starting point tip, that’s a new one for me and actually something I was looking for since I’m printing fairly smooth surfaces and the seam was very visible.

[3DPrintedArt]

No problem, glad I could help!

[Tank]

ABS can be very temperature sensitive. Do the gaps only appear after a certain height? When the heat of the bed no longer reaches the higher layers that can happen. SOlution is to have an enclosed printer or a very warm room…

[Tank]

Yes, no fan!

[Arnoldas]

I am curious. I see this from time to time in some prints - did you manage to figure out what caused it?

[3DPrintedArt]

Hey @Arnoldas, I only print with ABS, so I learned about this early on. On a thin print like this, if you have auto cool on (which he did), some layers may not adhere. This causes the cracking. Hope this helps,

3DPrintedArt

[AvMDesign]

I was able to fix it, but I changed multiple settings so I’m not sure if it was just one setting that did it.

Turned off fan

Increased nozzle temperature (from 230 to 245, filament range was 220-260)

Fixed filament feeding to be a bit smoother (doubt this had anything to do with it, but I changed it recently)

Switched settings to print infill before perimeters.

I think the last one had the most effect, but it might just as well be a combination.

My prints come out great now (see attachment), so I’m really happy with the changes I made.

Front one is with aligned seam, back one is with random seam.

[Design_Concepts]

Seems like under-extrusion to me. Have you tried bumping up the flow %

[tk0084]

This could be a model issue. I always run models through an online fixing tool before printing. I’ve had similar issues and only noticed after studying the sliced item and seeing that the problems in the actual print were also in the sliced model.