Solved Will Not Extrude When Temp Is 185

Hello forums its been some time since a post, I still lurk and try to find an opportunity to contribute though.

I looked and searched and found this thread
http://community.robo3d.com/index.p...se-filament-after-heating-up.8420/#post-74760

But my issue isnt a clog.

I found this issue after setting a temp of 180, when the extruder wasn't moving i checked it manually no clog comes out fine. If i try it at this temp using cura control panel it will not extrude if told to do so.

When a print with a temp setting 184 or less it will not extrude.

Example if I set to 185 it will work until the usual flex of the temp drops to 184 then extruder stops.

If I run 186 the temp can flex to 185 and keep on extruding fine.

I am guessing there is a minimal temp setting in the firmware with the range of 0 to <185 which triggers "Will not cold extrude emergency stop"

Its not a clog I can start a print at any temp 186 and up and the issue does not occur.

Anybody have this issue and fixed before I do digging through the firmware?

Have a good weekend

 

I usually print PLA at 190-215 you are on the really low side of melting it.

 

Yep 190 pretty low and pushing it but even the manuf RigidInk recommends 180 - 210. All the benchys I have tested thus far are screaming to be printed lower. Im on my seventh benchy and even tried an obnoxiously high min layer cooling time it helped but still not enough.


210 saggy and popping
205 same but less so
200 ""
195 ""
190 ""
188 is better but it really wants even less

Thanks for the reply

 

Thanks Geof, figured it might be firmware but didnt want to have to dive in there unless I was sure. Now I just have to remember the last one I installed

Appreciate the replies everybody I'll find the line fix test if all good Ill update the changes in here for the next person who runs in to this.

 

Here is the line in the firmware, I could find any others. Ill be testing this evening so will update is successful.

#define EXTRUDE_MINTEMP 175

Im dropping mine to 175, ill just be very careful in building/selecting my filament profiles to avoid trying to push a high req temp PLA

 

Marking this one solved by changing the "#define EXTRUDE_MINTEMP 185" line to 175 and uploading the firmware I can print just fine at a lower temp. 180 is running pretty well.

Also side note when updating your firmware save some headache and be sure to have Arduino 1.0.6 installed. Otherwise you may see a variety of compiling errors in newer versions. 1.0.6 worked first shot no issue and no special libraries or changes needed to the sketch.

 

Just an fyi on that. If you look at the comments at the bottom of the Robo firmware page, you will see my post about how to get the newer arduino versions to work. An old struct name in the firmware called fpos_t interferes with a global arduino library. So renaming that to filepos_t using a global search and replace in the sketch clears that up. Wish @ROBOLabs or someone would update the downloads. All the newer official Marlin firmwares use filepos_t for that struct name.

 

@danzca6 Awesome thanks for that I will stash that knowledge for future!