Strange sagging issue

Niall25kV · 20 Dec 2022 at 01:44

Hi folks,
Just wondering if anyone could maybe shed some light on whats happening here.
The part on the left is correct and the one on the right you will notice has some sagging of the horizontal links. The obvious explanation would be that the horizontal links are too long and need supporting but no. What makes this so stange is that I've only recently started getting this issue after nearly 3 months of printing, and it doesn't always happen - Both the parts in the photo are from the same print batch! Yet one is near perfect and the other is noticeable sagging.... :confused:

Really perplexed by this one! Any thoughts?
Cheers, and Merry Christmas all! Niall

BeeP · 20 Dec 2022 at 13:05

Hiya,

I dont see any pics on this post.

Seems very strange that youjr quality is fluctuating though, same filaments etc?

Niall25kV · 20 Dec 2022 at 17:08

Ah yes sorry I realised AFTER posting I can't figure out how to attach pictures on here. It seems to only want to link something from a url.. ?

This is a resing printer btw. Anycubic Photon Mono 4k, and yes I'm using the same resin and printer settings I started out with.

bulb66 · 21 Dec 2022 at 14:04

Niall25kV said:
Ah yes sorry I realised AFTER posting I can't figure out how to attach pictures on here. It seems to only want to link something from a url.. ?

Go here, https://imgbb.com/ sign up and upload images, then use a URL from those uploads on here.

For example a BBCode medium linked URL, can be pasted directly the body of a post and create this.

Niall25kV · 23 Dec 2022 at 02:59

https://flic.kr/p/2o7pEF8

Scougar · 26 Dec 2022 at 16:14

What printer?
What slicer and have you changed/upgraded it ?
What's your fan setup?
Checked your fans and nozzles? (That fans are running and not clogged, and nozzles aren't melted or dislodged).

Rotate the model 90 degrees. What happens?

bulb66 · 26 Dec 2022 at 17:18

Scougar said:
What printer?
What slicer and have you changed/upgraded it ?
What's your fan setup?
Checked your fans and nozzles? (That fans are running and not clogged, and nozzles aren't melted or dislodged).

Rotate the model 90 degrees. What happens?

It's a resin printer.

bulb66 · 26 Dec 2022 at 17:19

I suspect it's a lack of support issue or possibly a screen issue?

Niall25kV · 27 Dec 2022 at 01:22

Here's a better photo.
On looking closer I've just noticed the ones nearest to the edges of the print bed have come out ok while the ones more in the centre have the bowing. Does this mean its something to do with the FEP film?
As I said in my previous post this has only become an issue fairly recently, it was fine until about a month ago. It it possible for the FEP film to stretch and sag in just a couple of months?
Also, the temperatures are a lot colder now than they have been, I wonder if that might have any effect?

https://flic.kr/p/2o836mm

Scougar · 27 Dec 2022 at 18:25

oh wait. This was resin? Sorry if I missed this. I have no idea. Maybe move it away from that area to see if something is obstructing the screen?