I’ve been having considerable success printing with PETG as a support interface material for PLA and vice-versa, but I noticed the other day the bed temp changing when it switched between the two, from 55 to 70 (on the textured PEI plate) and it occurred to me, that if PLA is the base and PETG is being used for interface layers, this could be problematic as then the PLA in contact with the plate is over it’s target bed temp of 55.
I’m about to try a build adjusting a PETG profile for use as support interface to leave the temps at PLA bed temps for all layers beyond the first, but thought I’d check to see if this isn’t necessary or if there’s logic that just takes bed temps for whatever material is contact with the bed for the first layer only, for the whole print?
Then I thought about the generalized case, what about cases where there are two different materials with different temps set for layer zero, and both are in contact with the bed at the same time? Does the printer adjust bed temp between printing them both?
It may be an edge case, but I can think of some cases where compatible materials that have different bed set temps could lead to thermal set points cycling up and down during printing which could loosen the bond between the bed and the base layer.
/shrug