Keep in mind that the resin can get trapped where the walls close in on certain places. I tried using the Cube shape for the Hulk model and found out that it fits within the hole automatically. Lychee slicer has the Cylinder and Cube shapes of the drainage hole that you can choose from, depending on what will be more suitable for your model. If you’re worried about the drainage holes ruining the look of your model, you can also add them within the design of the model itself so it doesn’t look too noticeable. The black hollowed part is where the resin can get trapped so we will use drainage holes to drain the resin out. Here’s another example where you can see a drainage hole placed carefully on Hulk’s arm. The black part with little white dots represents the hollowed part and the single black circle is the drainage hole. The image given below is a good example that even though the model is hollowed, the drainage hole still needs more depth to get through to the inner area. This will allow your drainage holes to reach the inner area of your model and not be left out halfway through. Based on the wall thickness, you want the hole to be deeper than the wall thickness so it penetrates through easily. On the other hand, drainage holes have a specific size and depth. This simply determines how thick the walls of your model are going to be when it’s hollowed out, which translates to strength. When you hollow your model, you get to choose its wall thickness. In the screenshot below, you can observe how the drainage holes are dug at the bottom of the model, facing the build plate. This can be useful if you want a differently shaped hole since the Lychee slicer only offers Cube and Cylinder as the hole shape. You can also choose to turn your object into a hole so you can apply it to other models. The default settings can get you started well, with a Diameter of 1.5mm and Penetration of 2.0mm, as long as your wall thickness is below 2.0mm. You can adjust your “Diameter” and “Penetration” (length of the hole) in this tab. Click on the “Holes” tab then click on your resin 3D model to create the hole in your desired area. A window will appear where you can see the “Supports” and “Holes” tab. To find the “Hole” button in the Lychee slicer, you need to click on “Supports” in the Lychee Slicer workflow at the top.
#PREFORM FORMLABS DRAIN HOLEE HOW TO#
How Do You Dig Holes in Resin Prints How to Dig Holes in Resin Prints In Lychee Slicer The following video is a great explanation and illustration of how drainage holes work in your favor. I’ll explain where you should add drainage holes further into this article.ĭo keep in mind, drainage holes don’t always work as well as you think, especially if your part orientation isn’t optimal, or if the holes aren’t big enough. The usual process is to hollow your models in your slicer, then to add a few drainage holes where it makes sense. There are many benefits to adding drainage holes to your resin prints, so making sure you know how to create drainage holes properly is important. In addition, a hollowed model with no drainage holes might “explode,” as stated by Formlabs. That can easily lead to safety issues with uncured resin leaking from your model, as well as print imperfections that ruin the look of the print. Rather than having the uncured resin trapped inside your print, you can create drainage holes so that the uncured resin flushes out easily.ĭraining out this resin has many benefits such as saving resin, reducing print failures since prints are less heavy, and the holes work as a method of reduction in suction pressure.Īnother thing that can happen when the uncured resin is left inside your prints is the increase in pressure actually building up which ends up leaking out and even creating cracks in the side of your model. When your part is being created, the liquid resin can actually build up inside the model without leaking back out into the resin vat. The method of SLA 3D printing is done layer-by-layer using liquid resin. It also increases the success rate of your resin 3D prints by reducing the weight of your model. Resin 3D prints need drainage holes to allow the uncured resin to drain out of the model, as well as to relieve internal pressure that builds up between the FEP sheet and your model. Why Do Resin 3D Prints Need Drainage Holes?
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