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"Unload filament" featur heatsup a bed too.  

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Hooch
(@hooch)
Trusted Member
"Unload filament" featur heatsup a bed too.

Hi,
After printing I put my filament to drybox. I use "Unload filament" feature.
This features also heats up bed and leaves hotend and bed hot after using it.

I would like to suggest to add option (like question after filament unload) that asks you if you want to keep hotend hot or you want to switch to cool down mode. Also, don't heat up bed while using this option.

Posted : 16/11/2020 10:32 am
Neophyl
(@neophyl)
Illustrious Member
RE: "Unload filament" featur heatsup a bed too.

This is a user to user forum.  If you want to make feature requests you need to open an issue over at the appropriate github site.  

As the one you want would mean a change in printer firmware that would be https://github.com/prusa3d/Prusa-Firmware/issues for the mk3 series or https://github.com/prusa3d/Prusa-Firmware-Buddy/issues for the mini.

Also iirc you can use the lcd menu just to heat the extruder to temp (not using the preheat option but directly setting the required extruder temp) and when it heats up then choose unload filament and then it doesnt heat the bed.

Also one simple way at the end of the print is just to cut the filament off a few cm above the extruder and then store it.  Leave the stub in the extruder until the next time you print.  That way nothing can fall into the filament path as its got the filament left in.  

Posted : 16/11/2020 11:07 am
Hooch
(@hooch)
Trusted Member
Topic starter answered:
RE: "Unload filament" featur heatsup a bed too.
Posted by: @neophyl

(...)

Also one simple way at the end of the print is just to cut the filament off a few cm above the extruder and then store it.  Leave the stub in the extruder until the next time you print.  That way nothing can fall into the filament path as its got the filament left in.  

That is 10cm of filament that goes wasted.

Posted : 16/11/2020 2:31 pm
Neophyl
(@neophyl)
Illustrious Member
RE: "Unload filament" featur heatsup a bed too.

Maybe for you.  I however find uses for the myriad of small bits left on the end of rolls (of which I have lots) and any other short lengths.  My 3dpen has basically replaced my hot glue gun for tacking stuff down in many cases and I can use them in that.

If you are worrying about 10cm of filament then you are truly blessed.  It must be a joy to live a life without more pressing concerns.

Posted : 16/11/2020 2:43 pm
bobstro
(@bobstro)
Illustrious Member
RE: "Unload filament" featur heatsup a bed too.
Posted by: @hooch
That is 10cm of filament that goes wasted.
An admirable sentiment, but if you're concerned about 10cm of plastic waste, you shouldn't be 3D printing. Between prime lines, skirts, and supports, you are going to waste much, much more.
 
This has come up before. The logic is that, if you're swapping filament, you're probably getting ready to print. As @neophyl notes, the way to avoid this is to simply warm the nozzle up ahead of time.
 
I use Marlin 2.0 on my 2nd printer. It does offer the nozzle or bed only warmup options. It's not much of a time saver and does take a wee bit of memory. I know the Mk3 firmware is constrained for memory, so perhaps it was just a trade off decision. There may already be a GitHub issue open you can add to.

A great way to add simple capabilities like this is via OctoPrint. It is not constrained by memory and you can easily create elaborate macros for this sort of thing.

My notes and disclaimers on 3D printing

and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan

Posted : 16/11/2020 2:44 pm
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