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LSPc Technology Analysis
Posted by NEXA3D
Frequently asked questions
PRINTING SPEED
How do printing times change as a function of layering?
Why does every object have a different printing speed?
PRINTING QUALITY
Are you capable of printing solid objects?
Can you print surfaces and can we see the printing quality?
Does the self-lubricating film affect the resin and the finished printing quality?
RESIN
Can you use the resin more than once?
MISCELLANEOUS
Doesn't the printer have an enclosure?
I will try to describe the process as simply as possible, and there are obviously certain details that we can't divulge because they form part of our trade secret, such as the formulas of our films and resins, and how they are combined. Having said that you obviously need a clear idea of the printing quality that you get with our technology, but I hope you can appreciate how delicate some of this information is.
The answer to many of these questions lies in an understanding of the operating process of our LSPc technology, and especially in the time equation… First of all, you need to understand that our time equation is the result of our method, not the method itself!!
Unlike normal SLA/DLP printers, our printing time involves two speeds: the speed at which the new portion of resin sets (curing time - tp), and we all know about this and it's clear to everybody, and the speed at which the resin penetrates between the self-lubricating film and the recently formed object (refresh time - tb). We need this new parameter because we have dispensed with the tilting system that's typical of other printing methods, so we have to “wait” for the new liquid resin to penetrate! This second parameter depends on many factors, and here is not the place to list them all.
This is why we have a Partially Continuous Sequential System… if the refresh time of the resin is longer than the setting time… the machine has to “wait” for the new layer to get soaked in liquid resin… if, however, the refresh time is shorter than the setting time, the printer can form the object continuously, in other words, without layers!!
So having established that the setting time is constant in relation to the thickness to be solidified, why does our printing speed vary? Why do our videos show objects with holes?
The refresh time depends on many factors, but especially on the dimensions of the individual surface that we have to create for each individual layer… take a look at the example…