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Cura 2.3.1 Heat the bed and nozzle at the same time


catohagen

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Posted · Cura 2.3.1 Heat the bed and nozzle at the same time

Nope. In a lot of cases this is intentional as we are on a pretty tight power budget. We've had printers that would turn themselves of if you tried heating them with max power from the start.

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    Posted · Cura 2.3.1 Heat the bed and nozzle at the same time

    Nallath, printer works fine with this in Simplify3D

    M190 heats the bed with wait

    M140 heats the bed but jumps to next line

    so added these lines to the start gcode in machine settings :

    M140 S{material_bed_temperature} ; set bed temp

    M104 S{material_print_temperature} ; set extruder temp

    M109 S{material_print_temperature} ; set extruder temp

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    Posted · Cura 2.3.1 Heat the bed and nozzle at the same time

    Nallath, printer works fine with this in Simplify3D

     

    Like I said, it can work. But not all power supply units are exactly the same.

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    Posted · Cura 2.3.1 Heat the bed and nozzle at the same time

    Apart from @nallath electrical concerns, there's another reason why it is nicer to first heat up the bed, before starting to heat up the hotend: The hotend is going to reach its target temperature much sooner than the bed. Idle filament in a hot hotend can start to ooze and/or deteriorate in quality. For some materials (eg wood filled or brass filled), it can even lead to clogged nozzles.

    The added wait time of first heating up the bed and then heating up the hotend is going to by negligible compared to the print time for anything but the smallest of prints.

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    Posted · Cura 2.3.1 Heat the bed and nozzle at the same time

    Apart from @nallath electrical concerns, there's another reason why it is nicer to first heat up the bed, before starting to heat up the hotend: The hotend is going to reach its target temperature much sooner than the bed. Idle filament in a hot hotend can start to ooze and/or deteriorate in quality. For some materials (eg wood filled or brass filled), it can even lead to clogged nozzles.

    The added wait time of first heating up the bed and then heating up the hotend is going to by negligible compared to the print time for anything but the smallest of prints.

     

    Yes, I totally agree....but if we know all these things and still want to heat both, I think there should be and option :)

    If a print is finished and i want to do another one, the bed and nozzle are already warm but temp drops, if I start a Simplify3D file, both starts heating back up again, but start a Cura file, the bed heats and the nozzle cools meanwhile

    Hide it under expert settings or in the machine settings with a warning of weak PSU issues and clogged nozzles.

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    Posted · Cura 2.3.1 Heat the bed and nozzle at the same time

    A) Go to Preheat on Tinkergnome's firmware. Heat the bed to material temp, and set the extruder temp to 130 or so, which should be safe with any filament I've used.

    B) Wait for the bed temp to get to 3-5 degrees below target temp.

    C) Print the model, with the nozzle already pre-heated. The bed will reach the target temp at about the same time as the print begins.

    This is all automatable with Kisslicer using simple pre-print gcode and KS' temperature variables.

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    Posted · Cura 2.3.1 Heat the bed and nozzle at the same time

    A) Go to Preheat on Tinkergnome's firmware. Heat the bed to material temp, and set the extruder temp to 130 or so, which should be safe with any filament I've used.

    B) Wait for the bed temp to get to 3-5 degrees below target temp.

    C) Print the model, with the nozzle already pre-heated. The bed will reach the target temp at about the same time as the print begins.

    This is all automatable with Kisslicer using simple pre-print gcode and KS' temperature variables.

     

    Tinkergnome's firmware is UM2 only, im on UMO

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    Posted · Cura 2.3.1 Heat the bed and nozzle at the same time

    Nozzle heats up faster than the bed, so I set the bed to heat upto 50° first, and then start heating the nozzle and bed at the sime time, its perfect.

    Start Gcode :

    M190 S50 ; wait for 50C bed temp

    M104 S{material_print_temperature} ; set extruder temp

    M140 S{material_bed_temperature} ; set bed temp

    M109 S{material_print_temperature} ; wait for extruder temp

    ...

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