Toolhead preheat prior to a tool change.

Rushmere3D

There is a 3rd party PrusaSlicer post processor for this if your interested?

o_lampe

@hestiahuang I proposed to establish a tahead.g macro which runs, as soon as the look ahead planner finds a toolchange.
This could probably be too late, depending on the length of look ahead.
Finding the best solution is way harder, since each line of code can take longer or shorter.
My dual extruders always run at full temperature. Even when a tool is parked. I park the nozzle over a piece of nylon to prevent oozing and purge the tool, when it's reactivated.

jay_s_uk

@hestiahuang its part of the multiple motion support. https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x-Beta#reprapfirmware-350beta1:~:text=[Duet 3 MB6HC] [Duet 3 MB6XD] [Duet 3 Mini] Multiple motion systems are supported. See https%3A//docs.duet3d.com/en/User_manual/RepRapFirmware/Multiple_motion_systems. Caution%3A this feature is experimental and may not be fully working in this release.
there are now 2 gcode streams. however, how a user chooses which gcode stream is used I am unsure of

o_lampe

@jay_s_uk I guess these links won't work

jay_s_uk

@o_lampe works fine here (using googles copy link to highlight function)

o_lampe

@jay_s_uk You've posted one link, but it contains two http....addresses?

jay_s_uk

@o_lampe click it and see.....

o_lampe

@jay_s_uk said in Toolhead preheat prior to a tool change.:

there are now 2 gcode streams. however, how a user chooses which gcode stream is used I am unsure of

What I'm gathering from it is:

you slice two different parts (located at different places on the bed)
each part has it's own gcode file
In their start code you specify the tool number with M596 (both files will have X,Y and E components, but we don't need postprocessing to rename XY axes)

What I don't get is, how it will handle layer changes
And it doesn't preheat a tool, since both tools are working

hestiahuang

@jay_s_uk said in Toolhead preheat prior to a tool change.:

@hestiahuang its part of the multiple motion support. https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x-Beta#reprapfirmware-350beta1:~:text=[Duet 3 MB6HC] [Duet 3 MB6XD] [Duet 3 Mini] Multiple motion systems are supported. See https%3A//docs.duet3d.com/en/User_manual/RepRapFirmware/Multiple_motion_systems. Caution%3A this feature is experimental and may not be fully working in this release.
there are now 2 gcode streams. however, how a user chooses which gcode stream is used I am unsure of

Great to hear that, even it is for Duet3 6HC. Thanks a lot!

hestiahuang

@o_lampe said in Toolhead preheat prior to a tool change.:

@hestiahuang I proposed to establish a tahead.g macro which runs, as soon as the look ahead planner finds a toolchange.
This could probably be too late, depending on the length of look ahead.
Finding the best solution is way harder, since each line of code can take longer or shorter.
My dual extruders always run at full temperature. Even when a tool is parked. I park the nozzle over a piece of nylon to prevent oozing and purge the tool, when it's reactivated.

Any link about your tahead.g? Oh... I think I can check your post history and locate it. Thanks!