Cleaning strip settings Quantity and start  

RE:

;
; Extrude purge line
;
G92 E0 ; reset extruder position
G1 E{(filament_type[0] == "FLEX" ? 4 : 2)} F2400 ; deretraction after the initial one
G0 E5 X235 Z0.2 F500 ; purge
G0 X225 E4 F500 ; purge
G0 X215 E4 F650 ; purge
G0 X205 E4 F800 ; purge
G0 X202 Z0.05 F8000 ; wipe, move close to the bed
G0 X199 Z0.2 F8000 ; wipe, move quickly away from the bed

This is the original start GCode from the C1

If he's going to start washing up, I would personally do it like this:

;
; Extrude purge line
;
G92 E0 ; reset extruder position
G1 E{(filament_type[0] == "FLEX" ? 4 : 2)} F2400 ; deretraction after the initial one
G0 X235 Z0.2 F500 ; move to bed without E5
G0 X225 E4 F500 ; purge
G0 X215 E4 F650 ; purge
G0 X205 E4 F800 ; purge
G0 X202 Z0.05 F8000 ; wipe, move close to the bed
G0 X199 Z0.2 F8000 ; wipe, move quickly away from the bed

Alternatively:

https://www.printables.com/model/1499858-core-one-nozzle-wiper-v2-with-purge-bin-left-right

Or like this:

https://www.printables.com/model/1565570-prusa-core-one-nozzle-wiper-remix-with-steel-brush

RE: Cleaning strip settings Quantity and start

Here is the G-code from my Core One Plus

;
; Extrude purge line
;
G92 E0 ; reset extruder position
G1 E{(filament_type[0] == "FLEX" ? 4 : 2)} F2400 ; deretraction after the initial one
G0 E5 X235 Z0.2 F500 ; purge
G0 X225 E4 F500 ; purge
G0 X215 E4 F650 ; purge
G0 X205 E4 F800 ; purge
G0 X202 Z0.05 F8000 ; wipe, move close to the bed
G0 X199 Z0.2 F8000 ; wipe, move quickly away from the bed

M591 R ; restore stuck detection

G92 E0
M221 S100 ; set flow to 100%

RE: Cleaning strip settings Quantity and start

Replace

G0 E5 X235 Z0.2 F500 ; purge

With

G0 X235 Z0.2 F500 ; move to bed without purge

E5 means that the extruder feeds 5 mm of filament. Remove this and the code will now only start when the nozzle is 0.2 mm above the bed.

RE: Cleaning strip settings Quantity and start

Das ist die Ausgabe bei mir im Code!!! Wo muss ich da jetzt was ändern, hab eda noch keine Erfahrung im Coden That's the output in my code!!! Where do I need to change something now? I don't have any experience in coding yet.

;
; Extrude purge line
;
G92 E0 ; reset extruder position
G1 E{(filament_type[0] == "FLEX" ? 4 : 2)} F2400 ; deretraction after the initial one before nozzle cleaning
G0 E7 X15 Z0.2 F500 ; purge
G0 X25 E4 F500 ; purge
G0 X35 E4 F650 ; purge
G0 X45 E4 F800 ; purge
G0 X48 Z0.05 F8000 ; wipe, move close to the bed
G0 X51 Z0.2 F8000 ; wipe, move quickly away from the bed

RE:

Das ist die Ausgabe bei mir im Code!!! Wo muss ich da jetzt was ändern, hab eda noch keine Erfahrung im Coden That's the output in my code!!! Where do I need to change something now? I don't have any experience in coding yet.

However, there are other reasons for premature filament extrusion. Unfortunately, I don't know which filament you are using, but it may be (just a guess) that it is too “wet.”

Replace

G0 E7 X15 Z0.2 F500 ; purge

With

G0 X15 Z0.2 F500 ; move to bed without purge

RE: Cleaning strip settings Quantity and start

Posted by: @bricktec-lights

Good morning dear printer fans, I need some advice from you. It's about the settings for the cleaning strip that is made before each print. Shortly before it goes down to the plate, it already pushes filament through so that it rolls on the nozzle and then prints the strip onto the plate. How can I set it so that the cleaning strip is only printed when it is on the plate?  

The fact that the filament already gets extruded when the nozzle is still in the air is actually not a bug but a "feature" -- and one I like quite a lot. The curly end gives you a very convenient handle for pulling the deposited strip off the print bed later. With the Anycubic printer I had before, I have painful memories of filament strips ending up under my fingernail...

If the filament curls up so much that it sticks to the print head -- as Jan said, maybe it is too wet? 

RE: Cleaning strip settings Quantity and start

Just to state the obvious but OP says he doesn't know gcode stuff:

To avoid making that change every time, click the floppy disk icon next to the printer profile name and save it as a custom profile:

RE: Cleaning strip settings Quantity and start

I made the change you suggested in the code. Unfortunately, the result is not good, see pictures. I had to cancel the print after a few seconds.

RE: Cleaning strip settings Quantity and start

n that case, you have to extend the cleaning line so that the filament can fill the nozzle in time and the pressure in the nozzle stabilizes. I will not describe how to do it, although it is simple and everything happens at the gcode level. And a person who does not know at least the basics should not tinker with the settings if he does not know what he is doing.

RE: Cleaning strip settings Quantity and start

Posted by: @bricktec-lights

I made the change you suggested in the code. Unfortunately, the result is not good, see pictures. I had to cancel the print after a few seconds.

 

I don't think that poor print has much (if anything) to do with the way the priming line is deposited. The problems continue well into the first layer, by which time the filament flow should have stabilized in any case.

Which filament are you printing with? Have you dried it before printing? (How?) Have you cleaned you build sheet well? Given that it is the textured sheet, have you tried correcting the Z height of the initial layer, to ensure the filament is pressed into the pores of the sheet a bit?  

RE: Cleaning strip settings Quantity and start

Did it print okay without making that change? Not clear from the original post. In addition to what Jurgen was suggesting: Just a bit of filament on the nozzle can make live z calibration go off the rails, which could lead to the nozzle being too high and create the pattern you're seeing. Especially with PETG (but I don't know what material you're using). So while the nozzle is heating up, clean it with a silicone brush (millions of models for that on Printables) or a soft wire brass brush to make sure there's nothing sticking to it.

have you tried correcting the Z height of the initial layer, to ensure the filament is pressed into the pores of the sheet a bit

Easiest way is to hold the knob down just when the print is starting, to get the Live Z adjustment menu. 

RE: Cleaning strip settings Quantity and start

You can also set the Z offset to -0.05 mm instead of 0 mm in the slicer.

If you always have this filament residue, the nozzle wiper can help, but two or three loops are enough to move the object.

RE: Cleaning strip settings Quantity and start

You can try to print a "skirt" just before your model starts, see below.
https://help.prusa3d.com/article/skirt-and-brim_133969

RE: Cleaning strip settings Quantity and start

Dear printer friends,First of all, thank you very much for your advice. Unfortunately, the problem persists.

@miroslav.h4 It's a shame that I'm not qualified enough for your advice. I think you join a community to get tips from people who know what they're doing!!! Even if you don't know everything yourself.

The problem isn't the streaks themselves, but the fact that the filament is being pushed out into the air beforehand. It starts to roll at the nozzle and then sticks to it, which leads to streaks across the print bed. This in turn leads to smudging or similar issues in the actual print.When I used my MK4S with firmware 6.2.4, the filament was only pushed out onto the print bed. Which was cleaner than now. I would like to know why this is happening and how I can best stop it. Thank you for your support.

RE: Cleaning strip settings Quantity and start

@miroslav.h4 It's a shame that I'm not qualified enough for your advice. I think you join a community to get tips from people who know what they're doing!!! Even if you don't know everything yourself.

Please let us know if you have tried this:

Posted by: @gertl

You can try to print a "skirt" just before your model starts, see below.
https://help.prusa3d.com/article/skirt-and-brim_133969

Posted by: @foxrun3d

Correcting the Z height of the initial layer, to ensure the filament is pressed into the pores of the sheet a bit

Easiest way is to hold the knob down just when the print is starting, to get the Live Z adjustment menu. 

Posted by: Jürgen

Which filament are you printing with? Have you dried it before printing? (How?) Have you cleaned you build sheet well? Given that it is the textured sheet, have you tried correcting the Z height of the initial layer, to ensure the filament is pressed into the pores of the sheet a bit?  

Please remember that we are all just normal people who make mistakes. Successful assistance or even the resolution of problems by the author of a post on a platform such as this only works reliably if questions from other users are followed by answers!

RE: Cleaning strip settings Quantity and start

Posted by: @bricktec-lights

The problem isn't the streaks themselves, but the fact that the filament is being pushed out into the air beforehand. It starts to roll at the nozzle and then sticks to it, which leads to streaks across the print bed.

As mentioned earlier, the solution to that problem does not lie in changing the printer's priming movement. The filament should not curl upward like that, but flow straight down. Try to clean your nozzle -- from the outside with a brass brush, on the inside via a cold pull. Make sure to dry your filament, or try a different spool.