I use a variety of filaments and sometimes have issues when printing something flat that covers most of the build plate (Box type stuff). Sometimes I get warping on my first layer no matter what temperatures I try. But when I add a raft its perfect across the entire build plate.
So basically I would like to request an option to make the bottom of my print use the print settings used when creating a raft.
When will the lift happens?
Sometimes it’s the infill and upper layers that when cooled it pulls or shrinks and causes the lift no matter how well adhered is the first layer.
Not always us this but might help if you reduce the infill percent or consider this in your designs.
Also reduce cooling fan speed and add a tad of temp to the bed in addition to glue stick and maybe a skirt.
Hope it helps!
The lift happens on the first layer of the print bed or the first layer on top of the raft. But the raft prints perfect. With certain PLA.
If it’s your first or second layer coming loose, that’s not warping, That’s bed adhesion.
Might be that the raft prints better because it’s printed with a slower speed
Yea these methods eventually work after some tweaking and thanks for the reply’s. But what I notice is the way rafts are printed with slight gaps in the first couple layers which crisscross over each other never have this issue when I try new PLA filament. In my experience the rafts just always work.
So why not just have an option to make that the bottom of your print so you don’t have to spend time tweaking new PLA’s. Because it could be a lot of different things for different people such as ambient temperature, what layer the fan turns on, type of print bed (Glass/ PEI), the print bed isn’t completely flat, adhesion, etc.
And I’ve experienced and tweaked all these things to get things working. But across all these issues the raft always prints just fine. So I figure its something worth looking into which could possibly save many people hundreds of hours tweaking the dreaded first layer lol.
[UPDATE]
Sorry. Just read: @matthiasdeblaiser post and saw that I misread you post. I didn’t see that you have gaps in the RAFT not on your first layer, so disregard what I say on this post as [ORIGINAL].
I agree with @matthiasdeblaiser that pictures would do a lot to help us understand, also the name (brand) of your material, what bed are you printing and what settings are you using.
[ORIGINAL]
If you see gaps it could be that the nozzle hight setting is too high or, it’s under extruding.
Try adding more flow with that filament setting.
This happened to me with prusament PETG, and did a custom profile and added flow rate to 105%.
You can add 5% and see if that fixes it.
I would also do a first start calibration sequence, so that it calibrated itself again, and make sure you check the marks for the calibrations at the start of the print too.
To me slowing down the print is not a good solution because you are not fixing the problem from the root.
If this doesn’t work try changing the filament brand.
well that’s just how rafts work. they usually leave gaps between the lines for saving filament and easier release from your model.
The fact that you can’t print a first layer without it coming loose is a problem, and printing raft patterns as a first layer is not a solution, it’s a bandaid.
There must be something else going on. How we can help you? Well you start by providing pictures and print settings.