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Among in 3d printing troubleshoot, layer separation could be one of the most disastrous. Not only does a print with separated layers look terrible, but it also has virtually no mechanical strength.
It’s also irreversible – by the time you see layers splitting in your project, you will likely have to start over.
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Contents(show)
What Is Print Layer Separation?
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Layer separation also called layer splitting or layer delamination is caused by the filament material layer’s inability to bond between layers.
Without anything to latch on to, the material expands as it cools, creating the characteristic appearance of the layer warping upward.
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Reasons for 3D Printing Layer Separation
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About print separate, there are so many factors that could lead to this problem. such as software setting(cure), types of filament, and printing preparation.
It is not the problem with 3d printer, you don’t need to upgrade special hardware for your printer.
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Filament Type
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The melting flow rate is different among 3d printer filaments. When coming back to 3d printing, some has better adhesion of layers. ABS and Nylon are two outstanding examples.
If you’re having delamination between layers with ABS or other material which needs high print temperature, switching over to something like PLA or PETG might be the easiest solution.
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Nozzle is not Clean
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Any residual filament, dust, or dirt in the nozzle can cause extrusion problems because of clogging.
Inconsistent extrusion can lead to poor layer adhesion and eventually, layer separation.
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Improper Setting
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3D printers can be quite unforgiving when dialing in the proper settings for any given filament.
Improper printer settings can lead to delamination layers. It includes cooling fan speed, layer thickness, printing temperature, and so on.
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Want to Fix Layer Separation? Try These Solutions
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To develop a comprehensive solution to the layer separation problem, we must look at each possible reason and try to address it.
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Reduce Layer Height
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When printing with an FDM printer, the rule of thumb sets the layer height at about 80% of the nozzle diameter. Any higher setting and you run the risk of layer separation.
Reducing layer height creates a “squishing” effect when the material is extruding. This action can mechanically aid layer adhesion by pushing the layers together. Adjusting the layer height settings can be one of the most straightforward fixes to layer separation.
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Improve Nozzle Temperature
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Plastic at a higher temperature will always bond better. You can take advantage of this behavior by increasing your nozzle temperature. If you’re having layer separation problems, try increasing the hot end temperature by 5 °C increments.
You can continue doing this as long as you’re still within the acceptable temperature range of your filament. Also, watch out for stringing or blobs – that’s a sign that your temperature is already too high. Dial down the temperature a bit and look at other possible solutions.
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Slow Printing Speed
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As with most 3D printing problems, taking it slow and steady is a safe approach to eliminating layer separation. In this case, you may want to reduce the speed of movement of the print head.
Try to reduce your print head movement speed by increments of 10 mm/sec until you can see a marked improvement. Ensures that enough filament extrudes out as the print head moves. It also gives the filament enough time to create strong bonds with the previous layer as it cools down.
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Print In Enclosure
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One of the most reliable ways to avoid layer separation is to slow down the filament’s cooling.
Allows the material to maintain high temperatures longer, thus bonding better with the preceding layer. It also redistributes thermal stress in the material to avoid the usual warping issues.
A great way to slow down cooling is to print in an enclosure. It can maintain an elevated temperature in the printing chamber and prevents heat loss to the surroundings of the 3D printer. This way is advantageous if you’re printing in a room with an open window and periodic gusts of wind.
If your 3D print does not come with a built-in enclosure, you can buy a third-party product. You can even DIY a 3D printer enclosure using inexpensive materials. Just make sure not to use materials that can melt or catch fire easily.
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Check Clogged Nozzle
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The clogged nozzle will almost certainly lead to under-extrusion. The layer will have holes or gaps in them and compromising layer adhesion.
Any residual filament, dust, or grime can get burnt inside the nozzle and cause a clog. To avoid this, you can use a brush with brass or steel bristle to clean the inside of the nozzle periodically.
You can also do the “cold pull” method. Insert a piece of Nylon filament inside the nozzle, heat it, cool it down, and pull it out.
If this still doesn’t work, then you can disassemble the nozzle and soak it in acetone. While you’re at it, take the time to clean your entire extruder assembly.
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Improve Print Cooling
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The cooling fan in your 3D printer is there for a reason. However, that does not mean that you need to use it all the time.
If you’re having problems with layer separation, the best course of action would be to turn your cooling fan off.
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Other Tips You Need to Know
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The solutions we have listed above all have to do with the actual 3D printing process. Just as crucial as dialing in the correct settings is making sure that you are working with a suitable filament.
Here are a few things to check on the raw material side of 3D printing.
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Filament Quality
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When you work with cheap and poor-quality filament, you cannot expect it to perform just as well as those coming from reputable brands.
A common characteristic of cheap filament is that they have poor diameter consistency. It will lead to extrusion problems and inconsistent layers.
If you cannot get your layers to print perfectly, you will almost certainly have layer separation problems.
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Store 3D Filament Properly
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It has been repeated time and time – humidity is the mortal enemy of 3D printing filaments. Filament materials are naturally hygroscopic, which means that they absorb moisture readily from the environment.
The filament that is absorbed with moisture will lead to heavy extrusion problems. Water will expand and evaporate in the hot end, resulting in layers with holes or gaps. These are weak points in layer adhesion and will eventually cause the layers to start splitting.
To make sure your filament stays in good condition, keep it in an airtight container with some desiccant. Silica gel is an inexpensive and easily accessible desiccant option. You can also consider drying your filament in an oven for 4 to 6 hours before 3D printing.
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Summary
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3d printer layers separate are frustrating because there’s no way to salvage. For this reason, it’s worth the time to double-check your 3D printer and slicer settings to make sure that no layer separation takes place.
It’s also essential to use high-quality filament and kept away from moisture. This may sound like a lot of work, but it is still better than letting all the filament waste.
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