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Print material not sticking to bed

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Hi, this is our first post. Any help would be greatly appreciated.

We are printing in PLA and on our ultimaker 2+. We are having problems where the printed material doesnt stick to the bed effectively. This only seems to happen to the centre of the bed.

Any suggestions welcome. We have adapted the bed, changed nozzles, material etc and various other changes. Is this a common problem? Its almost as if the print nozzle moves around too quickly.

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Hi and welcome to the forum.


You could take out the glass plate and put it on a flat surface. Then tap with your finger on all four corners to see if the glass is flat.

Another idea would be that the build plate leveling was not done properly. When you are asked to use a piece of paper and slide it between nozzle and bed, don't push down on that paper because it would in turn push down on the bed.

If it still does not work, can you post a short video of the problem?

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Just from your words it sounds like the nozzle is too far from the glass.  But there can be many causes including the glass is dusty or oily.  You need to clean the glass about once per month.


But a much more thorough answer is here - I know it's a long video (15 minutes) but the details of how to get filament to stick well to the bed (really really well) is complex:


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