Stop Unload filament after each printing

Bambu Lab AMS General discussions
1

Hello, is there a way to stop AMS to unload Filament after each print?

I don´t need this. I only want to have it if on a new print the Filament needs to be changed.

BR
druckgott

2

Use a Y Splitter and load from an outside source do a manual removal when you need colors? I am really confused why you want to mod the software instead of making it easier on yourself, is there something you’ve not explained yet?

1 Like
3

Put a pause in your G-code at the very end of the print, and when the printer pauses, abort the print. It doesn’t unload the filament when a print is aborted (at least, it doesn’t seem to do so on my printer).

5 Likes
4

Ok can you send me your End gcode if it Do Not unload for you

I want to have this to changed because after a short Print it makes for me no sence to unload.

This has nothing to Do with manual load. I have a splitter inside.

The only thing what happens is that the cutter in the printer which Cuts the filament need to be changed earlyer. And this makes no sence for me.

I want to use ams because if i pint 5 parts in one color and other 5 parts with differnt color I dont want o load manually.

So if it do Not Happen on All peoples Printers maybe there is something wrong where it could be changed in config/ endgcode… .

Do anybody know where?

5

Just have each part printed on the plate as a whole model before moving on to the others, which is done in the slicer, just tell it to print by object instead of by layer

6

Ok thx But i also want Not to unload if the Print is finished. I only want to unload of a Differential slot is necessary aß long aß this is Not Necessary it should Not unload. Is there any config where i can do this or is it in the gcode or is it in the system integrated.

And what i am wondering is that some people. Do Not have this.

7

because the automation doing all of it causes you what 15 extra seconds? They won’t ever do that you’ll have to create your own software fork and create it yourself, too many others need it

8

There are several “Fast Start” gcode modifiers available on the web. I’ve been using this one for a long time and it works great. I use this if I’m doing a bunch of small test prints one after another with a single filament to fine tune something.

9

Ok I take a look the end code is the same. But now I found where the AMS puls back:
grafik

The Question now is, what lines do I have to remove so that the pullback do not happen

Is it up to M621? What is M620 for?
The rest of the GCode is clear.

There is something more, but I think this is not necessary:

grafik
grafik784×546 12.2 KB

10

Any updates on needed changes to end code? Did somebody figured this out?

11

No I haven´t time to do this. My goal is that it only pull out the filament if the color is changed ore I do it manually.

1 Like
12

I know this thread is a little old - but the Wiki was updated in January with this…
https://wiki.bambulab.com/en/ams/manual/ams-not-unloading-to-save-filament

10 Likes
13

Oh god, is BL this slow to react to users input?
I just got the X1 combo today, it really bugs me unloading the filament after each print. Why would it do that?(rhetoric)

  • adds time to the current print
  • adds time to next print
  • eats energy
  • eats filament
  • adds wear to hardware
    I would have thought it only retracts/changes filament if the new part uses a different one to start with. Hell, maybe a check mark in the settings would have been fine and easy to implement, do you want to unload? check! But no, it’s better to waist time, waist filament, waist energy.
14

Did you read the post directly above yours?

15

Did you?
If the solution is that I have to modify the Gcode and apply basically a hack I don’t know what to tell you…
What is worse is that BL considers this a “SOLUTION”.

16

It’s not a hack. It is a solution. If you need the printer to do something outside of the normal operation simply remove the gcode. You only have to do this once and save it as a “No Unload” profile.

1 Like
17

Yeah, I’ve seen what it does, what I wanted to emphasize is that the normal operation should not produce waist. Not if I have to print 20 parts from the same spool. If the majority of users never print two consecutive parts with the same material I would see unloading as normal, but again I thought this would be a simple setting that you check if you need it.
Anyway, thanks for your help, I still think this is a very good printer!

18

What I don’t get (apart from that they totally could make an option in the slicer or even in the ams fw itself to nut unload unless changing material or color, but don’t seem to want to), is that they keep claiming " But there is a certain risk of causing the clog at the hot end during the next printing, please operate with caution."

I get that not flushing when changing materials could cause a clog, but as long as you use the same material, what’s the risk? It is exactly the same as what the manual feed does (only unloadswhen you explicitly tell it to via the menu), and it never has caused a clog for me…

19

Hi

Thanks for sharing the link

Designing a new part, I had to print several prototypes using the same filament. I did use this solution that was working perfectly

The only issue I see there is when you launch the first print. As the flushing is deactivated from the filament start gcode, it won’t flush and you’ll start printing with the rest of the previous filament that remains inside the extruder.

The only solution I see there is to load and flush filament from BS or BH interface

And as a reminder, don’t forget to unload filament from BS or BH interface when you’re done with the last print

Cheers

JC