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Curved parts

Posted by hanex

hanex

Curved parts
March 06, 2015 07:25PM

Registered: 9 years ago
Posts: 5

Hello,

I just bought my first 3d-printer kit (prusa i3). But I have problems like in attachment picture? curved lines? I have used PLA 1.75mm with several different temperature options, but always the same result...What could cause this?

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tmorris9

Re: Curved parts
March 06, 2015 09:39PM

Registered: 11 years ago
Posts: 1,171

That is warping. The print is not sticking to the bed and comes loose as the plastic cools and shrinks.

You don't mention what exactly you are printing on but either you need to change (bare glass is not good) or maybe adjust the Z end stop down a tiny bit. There are tons of posts mentioning various things people like to use on the bed for adhesion ranging from blue painters tape to hairspray or purple glue stick. Just do a search.

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hanex

Re: Curved parts
March 06, 2015 09:50PM

Registered: 9 years ago
Posts: 5

Now I have been using blue painters tape and also heating bed to 65 and 60 for another layers. Part sticks to tape very hard, but maybe I should investigate it more and clean the ped before adding tape? but maybe my tape is not so good quality....

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IMBoring25

Re: Curved parts
March 07, 2015 12:36AM

Registered: 9 years ago
Posts: 351

At 65 you may be over glass transition for your PLA, which would be counterproductive. How warm is the room? Are you giving the part some time to cool before you remove it from the bed? Are you sure it's PLA?

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Ohmarinus

Re: Curved parts
March 07, 2015 06:29AM

Admin
Registered: 11 years ago
Posts: 3,096

Quote
IMBoring25
Are you sure it's PLA?

Same thing I wondered. I've never seen PLA warp this bad.

http://www.marinusdebeer.nl/

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hanex

Re: Curved parts
March 07, 2015 02:25PM

Registered: 9 years ago
Posts: 5

It should be PLA smiling smiley

. Now I am trying it with hairspray. First test was so bad that I had to cancel it.

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Zolzar

Re: Curved parts
March 07, 2015 08:13PM

Registered: 9 years ago
Posts: 3

I have been using Aqua Net on bare glass with my ABS prints. Works like a dream. Best $2.50 I've spent on my 3D printer so far!

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hanex

Re: Curved parts
March 07, 2015 10:34PM

Registered: 9 years ago
Posts: 5

Well maybe I got it somehow to stick in bed, but it is weird that middle of part edges are still shrinked...

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snoekel

Re: Curved parts
March 08, 2015 03:23AM

Registered: 9 years ago
Posts: 4

At what temperature do you print the first layer? The first layers seems very glossy and more "melted" than the rest of the layers.

Oh, and don't use your heated bed when using hairspray.......won't work, same for the blue tape.

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iamdarkyoshi

Re: Curved parts
March 11, 2015 01:31PM

Registered: 9 years ago
Posts: 98

Either sand the tape, or print on glass with a thin layer of gluestick. I can print ABS at 50 degrees without warp