PLA as interface filament for PETG

I’m afraid there’s an issue with the translation software. I can’t find the function you mentioned in Cura either. The name displayed to me in German is likely a fanciful creation by the AI.

Sorry, I’ve probably called it the wrong thing.

I found it. There are two methods: either as a cut or as a modifier. I’ve now placed two modifier cubes at the two critical points and reduced the speed there from 200mm to 50. The test will only run once the print bed is free.

So thanks!

I have now found the solution to my interface issues:

Interfaces with 2 layers on top/bottom, smoothed, and 0.0 Z-distance.

Changed PETG from Generic-PETG (16mm³/s) to 270°C for both model and supports.

Reduced the model base on the supports via Modifier to 30mm/s.

Changed PLA from Generic-PLA to 6mm³/s (probably unnecessary, since the interface is already at 50mm/s) and 250°C.

Now, small interfaces hold on the supports, and the PETG holds on the interfaces.

Gray is the PLA, and on top of it are two ~1cm long black strips of the object. This should be the transition to full speed.

The same with only one layer of the object

Copy & paste it.

I tried another attempt with 5 half-objects without smoothing:

Fail 2 of 5:

I noticed that, when you go for ‘tree’ support, the snapmaker slicer doesn’t always make gcode for an interface. Even the bottom interface is sometimes missing. The result is that your support is touching the object if you select a 0 Z-Gap. And in most cases your support is of the same filament type as your object…

Hi! I’ve only been printing for 3 days, so don’t scold me too much. I also encountered this problem when printing PETG with PLA plastic support.. The simplest inserts are plexiglass holders for my top cover, as in the photo. They have a U-shaped appearance. I tried a lot of filament settings and nothing helped, the PLA plastic was constantly peeling off with snot and threads, or deformed by temperature. Yesterday, on the 7th attempt, I solved this problem by reading the WIKI of the PETG manufacturer on the Bambu website (PLA plastic from Snapmaker).

They recommended:

  1. Lower the PETG print temperature from 255 to 245
  2. Raise the PLA printing temperature from 220 to 230
  3. Lower the table temperature from 80 to 60

I also turned off the 0.2mm Z-gap for the upper support layer in the support settings and set it to 0.

Now the supports are printed perfectly and can be deleted quite easily. The surface of the part made of the base material (PETG) is perfectly smooth and quite durable, as far as I can tell based on 3 days of printing, mainly with PLA plastic :slight_smile:

After: