Part Curling and how to fix

[Aaron Wintersmith]

Was printing the temp tower shown.

I noticed that during the print freshly printed layers would curl up and the hit the head. See circled area (sorry for poor pic). This caused some failures.

What causes this? Poor part cooling? How to I reduce/improve.

[Dan Flemming]

I would think it's part cooling.

The liquefied plastic isn't sufficiently cooling before the next layer is added, thus producing curl.

What printer & head unit do you have?

--
You received this message because you are subscribed to the Google Groups "3D Printing Tips and Tricks" group.
To unsubscribe from this group and stop receiving emails from it, send an email to 3d-printing-tips--...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/3d-printing-tips--tricks/1f4fdc5a-d3b7-4a34-8528-d9d907f6fe02n%40googlegroups.com.

[Joao Galante]

You need more cooling as mentioned. 

To solve it without messing with the printer, try print at slower temperature or/and slower speed. 

Usually dialing both gives the better solution. 

Or... 

Put the printer somewhere much cooler. 

Cheers, 

Joao Galante

---

From: 3d-printing-...@googlegroups.com <3d-printing-...@googlegroups.com> on behalf of Aaron Wintersmith <onecol...@gmail.com>
Sent: Saturday, March 2, 2024 11:22:13 PM
To: 3D Printing Tips and Tricks <3d-printing-...@googlegroups.com>
Subject: Part Curling and how to fix

 

--

[vrfx]

As noted - better cooling may improve the situation. 

So, 2 options additionally are - yes, you can go slower speed. And, typically there are settings in a slicer that allow you to set a Min time per layer. So, if its a very small area being drawn on a layer, the slicer will create "slack time" - to increase the time for that layer - and thus slowing it down. 

However, there's another trick. Create your own type of Prime Tower. This separate tower part will force the print layer to take longer to print - and thus slow the layer printing down even farther. Its a trick my buddy Shane did at Essentium a lot - especially when dealing with VERY Special customer prints and using things like Ultem - to really Dial things in to get a perfect part. He would do many, MANY Test prints as part of his testing process - and you may have to do similar - doing many prints - till you get things dialed in!

Am also curious. This Temp tower you're trying to print. I'd be interested in knowing why you are printing it??

-K

[Aaron Wintersmith]

I'm printing on a Tenlog TL D3 V2.

I'm printing the temp tower to try and characterize the printer & filament (PLA). 

I don't particularly think the filament is that special, but I'm still working my way through the various calibration/characterization prints.

And, as this one shows, I think my Tenlog has some particular issues with part cooling. This printer is also currently terrible at bridging. 

It's really weird, this extruder has TWO part cooling fans, each with their own duct. I don't understand why part cooling seems to be an issue but it defn is.

regarding the special type of prime tower. I get the idea. I've found similar before. When printing a very small part I've found that printing two copies can result in better prints, for essentially the same reason, the print head has to travel to another part on the same layer, thus giving the parts some extra cooling time.

ok, so print slower either directly or by adjusting the min layer time.

In the case printed above I generated the file on the teaching tech site, meaning no min. cooling time is enforced. If instead I slice the tower in Prusa slicer then it WILL enforce min time, but I'd have to manually edit the gcode to switch temps at various tower levels.

[Dan Flemming]

You didn't mention your printing temperature.

Since you have 2 part cooling fans, try turning down the fans to 40% to see if that helps, and the speed to 50mm/sec.

Adjust part pans up by 5% until you get good results.

I used a flat rectangle about 15mm thick (large enough to watch and adjust on the fly), with the infield at 10% to see what fan percentage worked best.

It was amazing to watch how the fan % effected the infield.

I printed best at 60% of fan percentage, this is now my default starting point).

Hope this helps.

To view this discussion on the web visit https://groups.google.com/d/msgid/3d-printing-tips--tricks/7ee47680-f8ca-4300-8bde-f1c0678b9c45n%40googlegroups.com.

[vrfx]

Aaron - NO - you should NOT have to edit GCode directly. There's a special method in PS - similar to doing Multiple processes in Simplify3D - that allows you to change various parameters based upon print level. My co-worker showed it to me Quickly the other day - I just didn't dig into it yet - so, I can give you details. But, you indeed should NOT have to edit your GCode. Just sayin'...

Others here - who are MORE familiar w/PS than me - should be able to point you in the right direction. I'm still kind of a Newbie (How DARE I admit that) w/PS - as I was previously a BIG TIME S3D user - 1st at SD3D (ironic the similar name) - and then at Essentium. I never owned S3D - just used it on those 2 jobs. I still think S3D Rocks - but, I did NOT jump into the New version - which changed DRASTICALLY - I found it a bit disappointing in that regards. Essentium was trying to switch over to Cura from S3D - so, I did have Some exp. in Cura. And, now - VM is also moving in that direction of open source slicers - and thus use PS.

Ciao for now...

-K

[vrfx]

Infield? Is this Baseball? Maybe you meant Infill? No worries - I just thought it was Punny...

-K

[Dan Flemming]

You know how these darn phones can interpret the wrong words when speaking instead of typing. 

On Sun, Mar 3, 2024, 11:08 PM vrfx <vr...@optonline.net> wrote:

Infield? Is this Baseball? Maybe you meant Infill? No worries - I just thought it was Punny...

-K

--
You received this message because you are subscribed to the Google Groups "3D Printing Tips and Tricks" group.
To unsubscribe from this group and stop receiving emails from it, send an email to 3d-printing-tips--...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/3d-printing-tips--tricks/cecc88e9-17eb-4f4c-9da0-26fed0f1868an%40googlegroups.com.

[3D Printing Tips and Tricks]

Sometimes there is simply no solution to this. Anybody here recall 3dizingof’s Cells Bowl?

IME worst case was I had to find a different material. There are times when your downward cooling won’t do it. One time I added a fan and pointed it at the print location.

[vrfx]

You know, Dan - Talk-to-Text technology on my phone is a Love/Hate relationship! I LOVE the idea of the Tech, and HAVE used it quite a bit! But, I HATE it when it makes typos, and I'm constantly forced to fix the typos!

So, yeah - I hear ya!

-K