u/MatheusBlu2

Hey everyone, I’m running into a super frustrating issue with my Mono 4 and could really use some fresh eyes on it. I keep getting recurring failures in the exact same spot: the front-left corner of the build plate.

Here is what’s going on, along with the photos attached:

The Problem & Setup

Presupported Minis: I used to struggle with placing supports myself, so lately I've been printing presupported minis exclusively. In the photo with the bases circled in red, the bottom 3 are failed prints. On the top part, you can see the Mimic's arm failed.

Disconnected Supports: In the photo of the presupported Mimic, if you look closely, some support tips aren't connected to the model at all. It feels like prints in this specific spot start off fine for the first few layers, but then fail higher up once the peeling force/cross-section increases.

RERF / Calibration Test Failure: After cleaning everything up, I ran a multi-exposure calibration test. In that exact same front-left spot, test block #2 completely failed and printed some to the build plate and some remained stuck flat on the FEP.

What I’ve Already Tried

Completely drained and cleaned out the resin vat.

Re-leveled the build plate from scratch.

Ran an exposure test.

Random failures happen from time to time, but having this specific corner fail so consistently is completely blocking my workflow.

My Questions:

Could this be a leveling bias issue (even after zeroing), or a tension problem with the FEP in that specific corner?

Could lift speed/peel force or temperature/rest time be tearing these supports apart at higher layers?

Is it worth checking the LCD/LED matrix for uneven light intensity in that spot?

Any advice, diagnostic steps, or similar experiences would be hugely appreciated! Thanks in advance!

Hi everyone, I'm facing a weird issue with my Anycubic Photon Mono 4 and I could really use some help.

The Problem: Randomly in the middle of a print, instead of printing normally, it creates these flat, cured plates/pancakes of resin inside the support structure, and then it continues printing perfectly fine afterwards.

In the attached picture, this was a batch of 6 miniatures. The other 5 printed flawlessly, and this specific one also finished, but I only noticed this huge solid chunk of resin hidden inside the support structure after cleaning it up.

My Setup & Settings:

Printer: Anycubic Photon Mono 4

Resin: Anycubic ABS-Like Pro 3 (Shaken for 1 minute, rested for 10 minutes to avoid bubbles).

Temperature: Ambient is 27°C (80°F), but I am also using the Anycubic Air Pure & Heat inside the enclosure to keep it stable and warm.

Slicer/Profile: Since the Photon Workshop software doesn't have a built-in profile for the ABS-Like Pro 3 yet, I am currently using my old settings for the ABS-Like Pro 2.

Could the Pro 2 settings be causing this (maybe exposure time or lift speed)? Or is this a corrupted sliced file / USB stick issue?

Any advice on exposure times for the Pro 3 or what else to check would be highly appreciated! Thanks!