Pre-heat button fails on M80 printers

[fieldofview]

Pre-heat button fails on M80 printers

[fieldOfView]

Start G-Codes are not sent when using the preheat function.

[fieldOfView]

I am not quite sure where to fix this. Sure, I could add a checkmark in the Connect to OctoPrint screen to "turn on power before preheating", though that would be quite machine-specific, and it would not fix the same issue when you connect the printer directly via USB. It should be somehow implemented Cura-wide, for any connectiontype, instead of every connection-type ending up with a slew of fairly specific printer fixes.

Honestly I think it should really be fixed at the firmware level (teacup firmware apparently does this: http://reprap.org/wiki/G-code#M80:_ATX_Power_On)

[AlexAhrens]

Try putting the comment in the Start-Gcodes in Cura. Right in the first line.

[blole]

Yes, you're right. I'm also thinking adding it in the firmware might be the best solution now.

[fieldOfView]

Or perhaps there should be more gcode sequences in the Machine Settings window in Cura, such as Pause/Resume/Abort print, Preheat/End Preheat, etc, similar to how OctoPrint already has these.

In the mean time, you could experiment with the following:
https://github.com/fieldOfView/OctoPrintPlugin/blob/2.5/OctoPrintOutputDevice.py#L449

    def _setTargetBedTemperature(self, temperature):
        Logger.log("d", "Setting bed temperature to %s", temperature)
        if temperature > 0 : 
            self._sendCommand("M80")
        self._sendCommand("M140 S%s" % temperature)

    def _setTargetHotendTemperature(self, index, temperature):
        Logger.log("d", "Setting hotend %s temperature to %s", index, temperature)
        if temperature > 0 : 
            self._sendCommand("M80")
        self._sendCommand("M104 T%s S%s" % (index, temperature))

[blole]

Yeah, that works :)

[Tollbringer]

Which file do I edit on a windows installation of Cura 4.0 to achieve this result?