u/T_o_n_e_92

Unexpected layer separation/deformation on Anycubic Photon Mono M7 – supports completely intact. What could cause this?
Hi everyone,
I’m trying to understand what caused a failure on my latest resin print.
The printer is an Anycubic Photon Mono M7 and I’m using Anycubic ABS-Like Resin 2.0 (White).
The strange thing is that the supports in the affected areas did not break at all. They remained attached and apparently intact, while some areas of the actual model show what looks like layer separation/deformation.
This makes me wonder if the problem could be related to the Z-axis movement/lift mechanism, for example a sudden step, vibration, mechanical resistance, or some kind of abnormal movement during printing.
Printer
Printer: Anycubic Photon Mono M7
Layer height: 0.05 mm
Slicer: Lychee Slicer 7.4.2
Resin: Anycubic ABS-Like Resin 2.0 – White
Resin color: White (#EFF0F1)
Resin specifications
According to Anycubic:
UV wavelength: 365–405 nm
Viscosity: ~283 mPa·s @ 25 °C
Density: 1.06–1.09 g/cm³
Hardness: 83–85 HD
Tensile strength: 34–42 MPa
Elongation at break: 20–25%
Bending strength: 1400–1800 MPa
Young’s modulus: 1800–2200 MPa
Volume shrinkage: 3.9–4.9%
Manufacturer’s recommended parameters
Printing environment: 20–40 °C
Normal exposure: 1.5–2.3 s
Bottom exposure: 28–35 s
Recommended cleaning: 95% IPA
Washing time: ≥3 minutes
UV curing: 405 nm / 3 minutes
I’m particularly interested in the fact that the supports themselves did not fail in the affected areas.
Could this be caused by:
A temporary Z-axis/lift movement issue or mechanical “step”?
Z-axis vibration or binding?
A sudden change in lifting force during those layers?
Incorrect lift/retract settings?
Something related to the resin/exposure?
Or is this more likely to be a normal layer adhesion/support-orientation problem?
I can provide more photos and a video of the printer during the problematic section if that would help.
What would you check first in this situation?
Thanks!

Hi everyone,
I need some advice from experienced resin printers because I am having a problem with my finished models.
Some of my resin prints are developing cracks months after they were printed, washed, and fully cured. The models were not dropped, damaged, or exposed to direct sunlight. They were stored indoors, but after some time small cracks appeared.
My setup:
Printer: Anycubic Photon Mono M7
Resins used:

Anycubic Standard Resin
Anycubic ABS-Like Resin 2.0
Washing process:

90% IPA
Washed carefully before curing
Curing:

Anycubic Wash & Cure station
Around 5 minutes under UV light
The problem happens after the models have already been finished and sitting for months.
I would like to understand what could be causing this:
Is it mainly a resin problem (too brittle or internal stress)?
Could it be caused by over-curing under UV?
Could temperature changes or heat cause cracks over time?
Could there be problems with washing, drying, or trapped resin inside the model?
I mainly print collectible anime-style figures and I want to achieve a professional quality suitable for selling. I am considering switching to more durable resins like Siraya Tech Fast, Siraya Tech Fast Tough, Elegoo ABS-Like 3.0, or similar.
Thanks!