Partially cured resin on FEP

Guest 2021-5-28 1167

Recently I've been having the following problem shown below where I print a number of parts successfully - and they turn out great, but there is a thin layer of partially cured resin on the FEP of my Vat. I have an Anycubic Photon Mono X.  When I first started using the printer about 3 months ago I had the problem but it seems to go away after a while, and I could run successive print jobs without cleaning the vat.  Now the problem is back. I've read about others having this issue and have check a number of things. First, I did a calibration test to see the condition of my LCD. It seems fine and don't see any burn-out or irregularities. Next, I check my build plate home/zero position - and re-ran a job, but that didn't help.  

I suspect and fear that the problem could be due to the fact that I recently had to replaced the polarizing filter on my LCD. I did adjust/install it correctly by angling it properly to block the most amount of UV light and observing that before I cut it and mounted it. It doesn't have adhesive but is mounted with the surround electrical tape.  I think the problem might be that the filter I purchase is not as effective at blocking light as the factory-installed filter that comes with the 4K LCD panel from Chitubox?


Any other potential causes that you can think of?



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  • Guest 2021-6-2
    Quote 2Floor
    We are not sure where the problem is, would you mind posting a picture here of your polarizing filter on your LCD?
  • 2021-9-28
    Quote 3Floor
    this might help.

    https://www.reddit.com/r/AnycubicPhoton/comments/gk0mrc/comment/fqp9nuf/?utm_source=share&utm_medium=web2x&context=3

    I made an official Chitubox + PHOTON ZERO thread... following wit as it's updated.
  • Guest 9 Months+
    Quote 4Floor

    Could you perhaps post a photo of your LCD's polarizing filter on this page so that we can better understand the issue? Rainbow Friends 

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  • Guest 7 Months+
    Quote 7Floor

    Since you recently replaced the polarizing filter on your LCD, it's possible that the new filter is not as effective at blocking UV light as the factory-installed one. Double-check the filter's orientation and how well it blocks cookie clicker UV light. You might consider trying a different, high-quality filter to see if it makes a difference.

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