04-19-2020, 11:11 PM
Well, you do need to add drain holes, but as far as the hollow itself, no. As soon as you hit hollow, it should go through the layers showing you how it did it. It's super obvious that it's now hollow. If it's not, check your settings and think about what they mean, and how that would work with your model. ( For example, if you had a simple cylinder that is 10mm wide, and did a hollow with a 5mm wall thickness, that would leave 0 thickness for the hollow. )
Be aware: Most things people would want to print on a mars are not good to hollow. It needs to be a large, relatively simple object, with good spots for multiple large holes. It needs to let both resin in and out, and air in and out, as it moves up and down. This also means you need the holes to first start at least where the hollow starts. ) Anything otherwise is likely to cause problems, and a single failed print can easily devour more resin than you would have saved. I recommend a minimum of 3 3mm holes to drain a hollow, and the bigger the hollowed area the more drainage it needs. Then, even once you have a hollowed print finished, you're not safe. You need to be careful with how you cure it: The resin shrinks a decent amount, and gets quite hard. If you fully cure the outside, but inside is still raw...it can rip itself apart as much as 2 weeks later. You need to be able to some light in and really cure the inside too. I like to fill the hollow with water ( using gloved fingers to cover the holes as much as possible ), and shine my UV lamp inside. Once you get the inside at least a decent ways cured, you can do your normal curing, but still making sure some light is getting inside the holes.
Be aware: Most things people would want to print on a mars are not good to hollow. It needs to be a large, relatively simple object, with good spots for multiple large holes. It needs to let both resin in and out, and air in and out, as it moves up and down. This also means you need the holes to first start at least where the hollow starts. ) Anything otherwise is likely to cause problems, and a single failed print can easily devour more resin than you would have saved. I recommend a minimum of 3 3mm holes to drain a hollow, and the bigger the hollowed area the more drainage it needs. Then, even once you have a hollowed print finished, you're not safe. You need to be careful with how you cure it: The resin shrinks a decent amount, and gets quite hard. If you fully cure the outside, but inside is still raw...it can rip itself apart as much as 2 weeks later. You need to be able to some light in and really cure the inside too. I like to fill the hollow with water ( using gloved fingers to cover the holes as much as possible ), and shine my UV lamp inside. Once you get the inside at least a decent ways cured, you can do your normal curing, but still making sure some light is getting inside the holes.