Hi folks,

I’ve used Cura as my main slicer with my Flashforge Creator Pro for several years with no major issues. It was a while since I had upgraded (4.12) and I decided to try out the latest version (5.6).

My printer and slicing profiles seemed to transfer over automatically, but when I tried to slice and print, I encountered a strange issue: It no longer heats the extruders or the bed.

It just starts “printing” immediately with stone-cold extruders and bed. The temperature settings in my slicing profiles seem unchanged from 4.12, so I’m a bit at a loss as to what is happening.

I can verify that this is not a hardware issue with the printer, as I can run print jobs generated in Cura 4.12, and the heaters work just fine.

Anyone else encounter this or a similar issue? Any known fixes or recommended troubleshooting advice?

Thanks in advance!

  • @sawecwEnglish
    1•5 months ago

    For me, this problem started with Cura 5.6. 5.5 was OK. It stems from lines in the start.gcode that have patterns with two values inside the curly braces such as:

    M104 S{material_print_temperature_layer_0, initial_extruder_nr} T{initial_extruder_nr} ; set left or right extruder temperature

    For a temperature of 200 and extruder 0, this should produce the gcode “M104 S200 T0”, but instead produces “M104 S(200,0) T0”. The latter causes the nozzle heater to shut off.

    It looks like this bug will be fixed in Cura 5.7. (https://github.com/Ultimaker/Cura/issues/17501)

    So the solution is to either go to a Cura version older than 5.6, wait for 5.7 or edit the start.gcode. For me, if I remove “, initial_extruder_nr” from each two value pattern, it works OK. In my Flashforge Creator Pro start template, this pattern appears 4 times. My nozzle temperature line looks like:

    M104 S{material_print_temperature_layer_0} T{initial_extruder_nr}

    If you have a configuration where the individual nozzles temperature/settings are different from the global ones, then things may not work as expected. For example, I am not sure if replacing {nozzle_wipe_gcode, initial_extruder_nr} by {nozzle_wipe_gcode} does the right thing, particularly with the left extruder. But I am printing fine with the right extruder.