How to remove the Nozzle operation temperature of UM 2

[Royh 0]

I want to print some filaments which better temp range at 140~155℃

but UM 2 have limit (180~260℃)

I tried to change the code type (Marlin, Rearap)

but the printer still still no output any filaments from nozzle

how can I do?

[gr5 2,210]

By default I believe the feeder won't rotate at any given moment if the temperature dips below 170C.  This line of code in Configuration.h:

#define EXTRUDE_MINTEMP 170

So one option is to change that line of code and rebuild Marlin but this is not trivial and would take an experienced programmer maybe 2 to 5 hours the first time (just a few minutes the second time).  I did post how to do this:

https://community.ultimaker.com/topic/16856-how-to-build-marlin-the-way-tinkerghome-and-ultimaker-do-it-if-you-have-windows/

 

HOWEVER there is another option.  You can enable cold extrudes with the gcode M302 (allow cold extrudes):

M302 S0

 

So you could add that gcode early on in the program - I guess just before you first move the extruder

 

I'm not sure what you mean by "um 2 have limit".  Are you talking about the TUNE menu?  Or Cura?  If the Material settings on the printer itself have a lower limit as well then you can go back to cura and go into "machine settings" (tricky to find) and change the options on your gcode flavor to Marlin instead of "ultigcode".  This will let you set the nozzle temp in Cura (or you can do it by hand editing the gcode.

 

Normally, for UM2 printers, the temp is controlled by the filament type on the printer itself but most printers (including every other Ultimaker printer type) don't do this and you control the temperature in Cura.