Don't know, but I will have a go...
NextX and NextY are the co-ordinates when the nozzle will move to next
PrimeX and PrimeY are similar, but can be used on the purge tower for additional movements
Warm and main are the temps fromt eh filament tab for (up to) 4 extruders.
As for the "exact use", that's difficult as I only use NEXT and PRIME on the purge tower, when loading and unloading with SNMM. These values are 10mm apart from each other.
Example (from "Select New Extruder" G-code):
Code: Select all
G1 X<NEXTX> Y<NEXTY> Z<MAXZ> E10 F370 ; Load filament
G1 X<PRIMEX> Y<PRIMEY> E24 F<LOAD_FEED_1>
G1 X<NEXTX> Y<NEXTY> E10 F<LOAD_FEED_2>
G1 X<PRIMEX> Y<PRIMEY> E4 F<LOAD_FEED_3>
G1 X<NEXTX> Y<NEXTY> E1 F<LOAD_FEED_4>
Peter