Print speed for first layer of interface material?
Is there a way to set the print speed of the first layer of interface material? For example, I use silk PLA as interface material. In some cases, I use PETG for support material. The problem is that when the first layer of silk PLA goes over the loosely spaced PETG support, it runs as full speed. Over support something like this:
Of course it doesn't bridge too well at full speed. The workaround is to set the interface speed to 50% or so, but then for subsequent layers it's just slower for no reason.
RE: Print speed for first layer of interface material?
I can't make sense of the image.Do you have a sample file? I'd like to take a look at it in PrusaSlicer.
RE: Print speed for first layer of interface material?
Simple answer is no. There is no setting to configure a different speed for the first layer of support interface.
RE: Print speed for first layer of interface material?
@joncl the forums are extremely screwed up these days, I suspect on purpose in order to confuse good information for bad, can you provide a working file and better explanation of what exactly your looking for from slicer. It's normal these days to see persons asking for things using the incorrect terminology for the thing they want, for example, asking for (information about "Parts" when they mean "Objects") this can be cause for the wrong information to be provided. If your willing to provide a file exported from prusaslicer the way you have been working it, people may be able to give you better information. Otherwise not.
RE:
I think there definitely should be a setting to control the speed of the first layer of interface material. I made up an example PrusaSlicer file attached.
The use-case is a flat horizontal overhang that needs support.
As I mentioned, I use silk PLA for interface material which separates cleanly from PETG, but still allows the PETG to "stick" during the print. Problem is, the first layer prints at FULL SPEED across the supporting (spaced out) material (unless set slower globally). Screen grabs below to help illustrate.
Example part:
One layer before the interface (layer 61):
Interface layer (#62). The problem here is that, if left at the default speed (100%), PrusaSlicer does not seem to know that it's printing over spaced-out support material, and it bridge across those gaps at full speed. PrusaSlicer needs to know that it's actually bridging here:
This is just a different view of the same first interface layer (#62) to show the spacing. I set interface spacing to 0 (zero), which leaves a nice bottom PETG surface. However, another useful setting would be to also control the spacing of the first interface layer, because zero spacing is not needed here (perhaps 200% of support spacing would be the default).
Also, it seems to print fine at default speed over the primary material (this is the first interface layer over the example part):
