Rigid 10K print fault

I was make severeal preprints by Gray pro resin for finally adjusting sizes, all was fine.
They when i was fully sure, model are ok, i try print it by rigid 10k resin, generally results and model looks brilliant. But i was confused with 2 faults where printer doesnt want print small verticall pipes. Print it partially, but partially it fully blocked, even drilling cant open the pipes. according picture. area marking as red arrow fully blocled, area maked as blue arrow unknow. Internal diameter 1mm, external diameter 2,6mm.

componetn very big, below 120ml, resin very expensive.
I can a little increase diameters, up to 1.5x3mm, but how to be sure it will not block on half way again. In both cases pipes print vertically and blocking happens on the “normal way” before pipe bending. Prewiev show there should be pipe. Generally even cheap chinesse printer can print pipes like this horizontally.

Printer form3, firmware and software latest at 09.04.2022. print thikness 0.05mm. all setup are automatic.

tryings to drill, then grinding for check, no any visibility of end of pipe
model not cured, washing only

Hello @Vertual ,

My name is Nakul Bende, and I will be happy to help you. Thanks for posting a detailed description.

Rigid 10K is one of our most accurate resins, I suspect what you are observing is a combination of difficulty in clearing enclosed channels, and bleed-through in overhang regions. We might be able to help, would you be willing to share the stl? It does not have to be the exact thing, even a block with representative geometry will help us in debugging and making suggestions.

Thanks!

Hello, NakulBende
Thanks for responce.

https://drive.google.com/file/d/1-Gh3uWz7SibUsL-CMx0sTbJpsn3ZM5OT/view?usp=sharing

Please send requst i will open file for you. It flow control unit for gas analyzer. Without whole unit electronics, firmware, software it useless. But mashine performance complete depend from accuracy of this component.

Expect print accuracy no worse than Black V4, Grey pro. (Grey pro good accuracy, but component flexible…)

declared problem are minor right now, elements which can`t printed by R10K was print as dedicated components by another resin and then glued. But mechanical engineer spend half year for air flow simulation and pipes shape - internal pipes accuracy most critical requirements.

Was used orientation pipes to build platform, automatic support generation without internal support. Then enable internal support and manually added where it possible remove after printing.

Has huge amount minor bugs caused by semi automatic drawing, it fixed manually right now, that can be ignored. That is especially that version of file as was printed in the April, With firmware and preform version actual for 11 April 2022.

About cleaning, i use Chinese PRK-188 (FAST) solution. Supplier not tell what is it, i not ask. Maybe it paint remover.

It like oil (smell like oil, not evaporate, consistency like light oil), which not dissolve uncured resin, it instantly displace uncured resin from surface of component. Then wash by water, rest of cleaning solution catch chemical reaction with water and stay white like milk.

Effect of washing looks like drop of gasoline on water surface. Even enough several dishes for complete clear big element. but I completely immerse this component in this cleaning solution and flush all pipes by syringe. After all clean by high pressure air.

Extreme useful when need catch accurate size and keep accuracy for extreme small elements, because in compare with dissolving solutions it not damage surface.

I sure, this is not a cleaning problem.