Multi-Material Print Settings at Material Interfaces
What I am trying to do is print PLA on top of TPU. In order to adhere to TPU, I'll need to be around 225-240 degrees C.
However, the problem I am running into is two fold:
1. I am using a modifier to change the material rather than a piece. The slicer does not compute an interfacial layer or shell, and instead tries to print the infill pattern on top of the prior material. This is causing failure at infill densities less than ~60%.
2. The printer does not print at the first layer temperature I've configured for the PLA extruder when printing the first layer of PLA onto the prior layer of TPU.
I've been able to get around number 1 by increasing the number of bottom layers, which are still evaluated from the print origin. But I need to be able to configure this to occur when one extruder is printing on top of the output of the other extruder instead. I probably need to turn on some kind of interfacial shell layer setting. For #2, I can set the entire print to 225, but I think that may make the print less reliably good than my default settings of 215 for the first layer and 210 thereafter, although 225 is in the tolerance for the PLA roll. I also have a PLA roll that allows printing up to 240, so I should be able to get good adhesion and get this print off my table, for now.
To summarize, I think there may be 3 things that need to be accounted for in Prusa Slicer to have control over this situation:
- interfacial shell layer ON and COUNT setting
- interfacial print temp per extruder, set for each extruder, with default fall through
- both settings can be manipulated for modifiers and sub-parts
If anyone could point me to the configuration options that I can manipulate to control the interfacial settings going forward though that would be a huge help, because I am not always going to be printing with my mass fill rolls, and being able to fuse the more fidgety (and expensive) colors properly to materials that print at a higher or different temp the first time would be amazing!
Thanks!