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Cura adds heating commands before my start code which contains other heating command


titust1
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Posted · Cura adds heating commands before my start code which contains other heating command

Is this a bug?

My Start code in Cura contains the following
M104 S180 ; sets hotend temperature for bed leveling (warm but not dripping)
M140 S60  ; sets bed temperature layer_0 for your material
M109 R180 ; sets hotend temperature for bed leveling and wait until temperature reached
M190 S60 
Despite that Cura is adding in the generated gcode other commands for heating
M140 S60
M105
M190 S60
M104 S210
M105
M109 S210

I don't understand why it is doing this. It defeats the purpose of having a start code and it does not give the control to the user.
Why is that?

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    Posted · Cura adds heating commands before my start code which contains other heating command

    You should use replacement patterns with curly brackets like so:

    M104 S{material_print_temperature_layer_0} ; sets hotend temperature for bed leveling (warm but not dripping)
    M140 S{material_bed_temperature_layer_0}  ; sets bed temperature layer_0 for your material
    M109 R{material_print_temperature_layer_0} ; sets hotend temperature for bed leveling and wait until temperature reached
    M190 S{material_bed_temperature_layer_0} 

     

    Cura looks for those replacement patterns (ie: the text + the curly brackets). If your start gcode includes those, Cura will not add its own preheat sequence.

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