Avoid Travel Moves over Different Colors?
 
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Avoid Travel Moves over Different Colors?  

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aidave
(@aidave)
Active Member
Avoid Travel Moves over Different Colors?

I'm printing flat objects like nametags, with multiple colors.

However I keep getting messy strings because the nozzle is moving over different colors when it doesn't need to (I'm not talking about a color change)

Is there any way to tell Prusa to avoid travel over different colors when possible? It would make more travel moves, but would make a cleaner print.

Posted : 28/10/2021 5:27 pm
Swiss_Cheese
(@swiss_cheese)
Noble Member

Well, you have given us, as little information as I think it's possible to, for us to help. So I can only suggest that you try "Avoid crossing perimeters" If you haven't already, and maybe you can do something with the "lift Z" in combination with adjusted retractions.

 

Good Luck

 

Swiss_Cheese

The Filament Whisperer...
Posted : 28/10/2021 6:55 pm
JoanTabb
(@joantabb)
Moderator

If the problem is strings dropping onto other areas, try reducing the print temperature a little, this should reduce strings... 

 

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 28/10/2021 10:23 pm
aidave
(@aidave)
Active Member
Topic starter answered:
Filament Temperatures
Posted by: @joantabb

If the problem is strings dropping onto other areas, try reducing the print temperature a little, this should reduce strings... 

 

 

That's a good point.

I have some glow-in-the-dark filament that just doesn't do well under 220

Mixed with regular colors that do well at 190 ... and that is the problem, the regular ones get hot to 220 and ooze+string.

I'll look for temperature settings for each filament, that should help

Posted : 28/10/2021 11:15 pm
JoanTabb
(@joantabb)
Moderator

indeed... 

if you are doing colour change by layer height, what you can do, is to choose 
'Add Another Code' 

instead of adding the normal filament change... 
then within your code, you could , for example move the nozzle away from the Print  say.... 

G1 X240    ; Move Extruder to right, away from print
;then if you are changing to a hotter filament  perhaps  add
M104 S220 ; set extruder temp 220C
M109 S220 ; wait for extruder temp 220C
M600 ;  cause filament change after temperature changes... 

On the other hand, if you are changing to the cooler filament you could consider 

G1 X240    ; Move Extruder to right, away from print
M600 ;  cause filament change before  temperature changes... 
;then if you are changing to a cooler filament  perhaps  addM104 S190 ; set extruder temp 190C
M109 S220 ; wait for extruder temp  to drop to 190C
; and then the print should continue at the new temperature

the red commands should raise the extruder temperature to load Glow in the dark filament, 

and the Blue Commands should help you revert to normal PLA... 

I would do a test print to check the codes before committing them to a real task... because these codes are off the top of my head... 

Good Luck, 

Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 28/10/2021 11:57 pm
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