due to my medical engineering studies, i’d like to print with several materials such as Agar-Agar. Therefore I need to cool down the extruder to 50C° or less. Sadly, if I use those settings (Extruder and Printer to 50C°) with the Repetier Host software the gear weels which should get the material aren’t rotating anymore.
Is this a software problem of Repetier Host or is it a problem of the printer itself?
Maybe someone tried something similar and can get me some tips?
[quote=“VEL337”]This is probably a firmware “problem”
It’s a feature called “cold extrusion prevention”.
If the hotend is colder than a certain temperature the extruder wont move.
You’ll have to edit the firmware and upload it again to the printer.[/quote]
Thank you for the fast answer.
Can you please tell me how and where i can edit the firmware with the feature? The printer is only a loan from the University so I haven’t worked with it a lot yet. Maybe something similar has been done in an other post (I couldn’t find one…).
Kind regards,
Fetsch92
Hy,
in marlin configuration.h file, you will find the values to modify here
#define PREVENT_DANGEROUS_EXTRUDE
//if PREVENT_DANGEROUS_EXTRUDE is on, you can still disable (uncomment) very long bits of extrusion separately. #define PREVENT_LENGTHY_EXTRUDE
i could change the Firmware so the gear wheels rotate with sparse temperature. Now another Problem showed up, the gear wheels rotate in the wrong direction. Aditionally i can’t autocontrol the Printer with Repetier anymore. I uploaded the latest Marlin Firmware and changed the part as described.
It would be kind, if someone can help me again.