1 Topic by willthewill

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Topic: Prints tend to curl up!

Hello!

I've had my solidoodle press 2 weeks ago and i'm still strying to find the best settings. I would say i'm kinda happy with it ( it's sort of magical when your design emerge from nothing but you know what i mean big_smile).

My biggest problem so far is that when the overhang became intense, the print tend to curl up resulting in my nozzle touching the print and ultimately pushing the part off.

I read manyyyyyyy forum but still don't find a clear answer. Do you have any solution?

Printing setup:
White ABS
Extruder: 250 ( does the same at 210...)
Heated bed: 95

Thanks!

2 Reply by madfalcon81

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Re: Prints tend to curl up!

Increase bed at 100 and let it get "dirty". The more hairspray it remains on the bed, the higher the adhesion.

Fat kids are harder to kidnap!

3 Reply by willthewill

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Re: Prints tend to curl up!

The problem is not that it don't stick, glue spray 3M work wery fine, the problem is here ( as you see on the picture on the print behind )

http://soliforum.com/i/?SuqGb1z.jpg

When overhanging the print curl up.

4 Reply by toothrobber

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Re: Prints tend to curl up!

Hello willthewill

I had the same problems when I first got my Press. I was trying to print a large 5" sided triangle and the one edge kept on curling up. After searching and reading about the problem. Hair Spray was the answer. At first I tried a hair spray from my local store. All of the posts said to use the cheapest hair spray you could find. The first can that I got was $9.00 a can. It kinda worked. So I went to the Dollar Store and purchased the cheapest can of hair spray that I could get $1.68. This worked much better than the first can.

As an alternative I have also ordered some Kapton Tape because the hair spray is working the tape is a further experiment.

Keep trying, I found a good three or four coats of hair spray. Spray then leave it to dry then spray again let it dry works for me.

Robert

5 Reply by chenderson

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Re: Prints tend to curl up!

A bed of PEI has solved most of my adhesion problems. I also like to keep a squeeze bottle with a hypo needle filled with acetone I got from eplastics. If I am printing something large that I know will be a problem I put a couple of small drops on the corners I think will lift up after it has laid down a few passes..

6 Reply by scruffybob

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Re: Prints tend to curl up!

I don't think he's having adhesion issues.   I think he's describing something completely different.   I've seen the same thing.   When printing objects with overhang, if the print head moves backwards, it drags up the end of the overhung filament so that it is slightly higher than the rest of the print.   When it does that many, many times it builds up a little wall where eventually the nozzle can't get past it and it knocks the whole print over, regardless of how well it's adhered to the bed.

The only thing I've seen that has helped me in this case (except for manually squashing down the little hills with a paint scraper as they build up), is to "lean out" the amount of filament extruded.   I'll lower my extruder ratio until it's lean enough that it doesn't have anything extra to pull up on those overhangs.

7 Reply by Mysterio

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Re: Prints tend to curl up!

Yeah he's not talking about adhesion issues but rather an upward and inward curling of the UPPER edge of the print.  I had the same issue trying to print a pretty large "marble run" piece for my kid.  I had about 5 attempts fail mid-print before I realized what happened.  The bottom was very well adhered and not curling at all, but the upper edges curled upwards.  The print head started to clip against it since it was now invading it's space, and eventually the clip turns into a pretty hard "chunk", and eventually it interferes with extrusion enough that it clogs up.

It's been a couple of months since I even printed anything but I think I was able to finally get that piece to print by increasing both the extruder temp and the bed temp so things would just cool slower in general.

8 Reply by willthewill

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Re: Prints tend to curl up!

Indeed this is not adhesion problem!
I print at 250 for the nozzle and 100 for the bad so i dont think it is the temperature, but i post it in another forum and it seem indeed that it could be overextrusion!

I keeo you updated!

9 Reply by AZERATE

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Re: Prints tend to curl up!

Overextrusion may be a factor, but the given image is a little too blurry to be sure on our end.
I would recommend adding a fan for the nozzle and lowering your temps a bit. I'm currently printing ABS at 232-240, so 250 (assuming you didn't mistype) is quite high.

Actively cooling the extruded material is essential for PLA, but can also help with ABS parts. I've been running a fan with ABS for 4 months now and have no intentions on removing it smile

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10 Reply by willthewill

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Re: Prints tend to curl up!

I admit i'm a little bit lost, i heard that the delta in the temperature of two layer in abs was very important, anyway maybe i'm indeed too hot for print object of this size

11 Reply by willthewill

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Re: Prints tend to curl up!

I admit i'm a little bit lost, i heard that the delta in the temperature of two layer in abs was very important, anyway maybe i'm indeed too hot for print object of this size

12 Reply by mrallinwonder

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Re: Prints tend to curl up!

@Azerate - is the fan controlled by anything, or just blowing continuously (& gently?) on the most recently extruded part?

13 Reply by AZERATE

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Re: Prints tend to curl up!

You can splice the fan wires into your existing wires for the extruder motor fan, or if electrical skills are as horrendous as mine, a separate PSU. I also chose to do the latter since I run lots of fans (Y motor, X motor, E3D, nozzle fan, 2 fans on the board, and one on the PSU). If printing PLA, you will need continuous blowing. Some ABS prints will require the same for good results...tall narrow parts where the nozzle sits over for too long.
You don't need an air mover for this. 30mm fans work just fine and they are cheap and abundant.
Some boards allow for Gcode controlled fans. The stock board on the Press is not one of those unfortunately.

To my knowledge, nobody has designed/shared a nozzle fan for the Press, so you will have to design your own or maybe reach out to a veteran Press user if they have the time.

Printit Mason and Printit Horizon printers
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Filawinder and Filastruder #1870.....worth every penny!

14 Reply by madfalcon81

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Re: Prints tend to curl up!

AZERATE wrote:

To my knowledge, nobody has designed/shared a nozzle fan for the Press, so you will have to design your own or maybe reach out to a veteran Press user if they have the time.


http://www.thingiverse.com/thing:852826

This guy did  and I printed one, but I am waiting for my 12V 20 mm fans from aliexpress. FYI the are more expensive that 40 mm ones. Dunno why.

Fat kids are harder to kidnap!

15 Reply by AZERATE

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Re: Prints tend to curl up!

I saw that one. However, since it has not been tested as stated on the Thing page, I was reluctant to recommend it. Far too many Thingiverse designs are only theoretical....
Let us know how it works out for you!

Printit Mason and Printit Horizon printers
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16 Reply by carl_m1968

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Re: Prints tend to curl up!

AZERATE wrote:

I saw that one. However, since it has not been tested as stated on the Thing page, I was reluctant to recommend it. Far too many Thingiverse designs are only theoretical....
Let us know how it works out for you!

My rule for Thingiverse is if I dont see a picture of the actual printed item I don't even bother.

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17 Reply by jagowilson

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Re: Prints tend to curl up!

madfalcon81 wrote:
AZERATE wrote:

To my knowledge, nobody has designed/shared a nozzle fan for the Press, so you will have to design your own or maybe reach out to a veteran Press user if they have the time.


http://www.thingiverse.com/thing:852826

This guy did  and I printed one, but I am waiting for my 12V 20 mm fans from aliexpress. FYI the are more expensive that 40 mm ones. Dunno why.

You dun goofed. The press is 24V. You'll need an additional power supply to use 12V fans.

18 Reply by madfalcon81

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Re: Prints tend to curl up!

jagowilson wrote:

You dun goofed. The press is 24V. You'll need an additional power supply to use 12V fans.

Hmm, I think I attached a 12 V fan to some pins on the motherboard and it worked. I will tell you for sure tonight when I get home.

Fat kids are harder to kidnap!

19 Reply by Goshdarnit

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Re: Prints tend to curl up!

jagowilson wrote:
madfalcon81 wrote:
AZERATE wrote:

To my knowledge, nobody has designed/shared a nozzle fan for the Press, so you will have to design your own or maybe reach out to a veteran Press user if they have the time.


http://www.thingiverse.com/thing:852826

This guy did  and I printed one, but I am waiting for my 12V 20 mm fans from aliexpress. FYI the are more expensive that 40 mm ones. Dunno why.

You dun goofed. The press is 24V. You'll need an additional power supply to use 12V fans.

Not so. My Press actually came with a 12V fan installed! It worked fine. I have since replaced it with a 24V as part of my E3D install, and that also works fine! Weird, but true!

20 Reply by joeix3 (edited by joeix3 2015-06-18 23:44:38)

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Re: Prints tend to curl up!

I have that almost in all of my ABS print outs.
No matter how you spray it or use a ABS- slure paste, it will always curl up or in the middle of the print object has some lift or gap.

Everybody will tell you that you need your bed 100-110 and filament should be in 200, they are correct !

But you also need to make sure your SD has an enclosure and not because your bed says it has reach 110 means it's good to print. You still need to wait a bit as the glass bed is the one that really need to reach the right temperature.

I did this method and since then, I never have that same problem.
  And also, make sure your filament is not a cheap imitation, that helped me too.

21 Reply by heartless

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Re: Prints tend to curl up!

try slowing the print speed down if the curling is on an overhanging part of the print - too fast will pull the edge upwards.

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22 Reply by Crucial

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Re: Prints tend to curl up!

Just as an FYI, the press is 24v but on the board itself, it either PWMs or regulates the voltage down to 12v for the fans.