[Cura retraction during fill?]

Hi!

Oh sorry, it looks like i deleted my config during testing/playing around with 13.06 and 13.10 debugging the problem with infill directions.

Unfortuantely i can not reconstruct my settings where i got that behaviour...

I just reinstalled 13.11 and the problem does not seem to happen with my current settings.

If i ever encounter them again, i will post the settings here. Thanks for looking into it!

Regards,

Simon

 

[Cura retraction during fill?]

Oh sorry i made a mistake in my ordering, i swapped 3 and 4.

what i see in your notation is:

1) Cura prints a bit

2) Cura retracts

3) Cura moves to infill

4) Cura pushes back from the retract at 2)

5) Cura prints infill

and now the bad part:

6) Cura moves to the next (far away, parameter crossing) section

 

The move from 5 to 6 is without retract. The behaviour i would expect is

1,3,5,2,6,4

(= retraction only for the big move and not for the infill)

 

So the detection when to retract goes wrong. If i set the minimum travel/extrusion values before retraction to

very small values i get many retractions but at least it adds the right one between (5) and (6)

 

I just found out 13.10 does not do it wrong, it starts with 13.11.

You can observe it with this file:

http://www.thingiverse.com/download:86621

 

The first (5 or so) arm layers after the base are ok, then cura starts to show the wrong behaviour.

 

Regards,

Simon

 

[Fill-Direction always the same ??]

Hi!

I just found out cura 13.10 does not show this wrong Behaviour.

In order to repeat/debug the problem you can

download a file that prints wrong with cura 13.11 here:

http://www.thingiverse.com/download:84980

And here are my settings saved as ini:

http://pastebin.com/mPb6ju2S

Regards,

Simon

 

[Fill-Direction always the same ??]

Hi!

I just stumbled upon the same issue printing a large panel (Cura 13.11):

The first and second layer are rotated 90° and the following layers are all the same :(

Simon

 

[Cura retraction during fill?]

Hi!

I did some experiments. I think there is something going wrong....

If i print the hollow calibration pyramid, the first layers where the arms start to be printed work fine,

then cura changes to a strange behaviour:

1) it prints one arm

2) retracts (E=Eold - 4mm)

3) prints a very small part from infill

4) moves E=Eold

5) moves to next arm position

It should retract after the infill print?!

I see the minimum extrusion kicking in, if i st that to 0.0 it retracts after 4 as well but i get a lot of retractions.

Any clues?

Regards,

Simon

 

[Cura retraction during fill?]

Hi!

Thanks for your suggestions, i will try them tonight.

To me it looks like there is some timing issue (?) with cura.

The prints look really really bad compared to slic3r, even printing at 210°C in slic3r looks way

better than 190°C in Cura (talking about stringing issues).

To me it looks like cura times the retracion in a wrong way, it seems that the retractions happens "too late"

-> i get strings when the head starts to move to a new position

-> after reaching the new position i do not get enough material being pushed out resulting in not closed infill

I will post pictures today from the tests i printed yesterday.

Maybe i will dig into the produced gcode, mayber i get a clue what cura does differently.

I might try older versions of cura to see if this helps.

Regards,

Simon

 

[Cura retraction during fill?]

Hi!

Thanks! That looks much better. However i still get some oozing...

The same retraction (30mm/s, 4mm) for my kossel delta (bowden) work fine with slic3r.

When i use cura (13.11) and the same settings i get a lot of strings.

Even if i set it to 70mm/s 6mm it looks still bad.

What does Cura differently than slic3r?

Another thing i noticed with cura: At the continuation point after retraction i get a weak (incomplete) fill.

Very strange... Any ideas?

Too bad, i really like the way cura calculates its toolpaths :( I do not want to switch back to slic3r :-

Regards,

Simon

 

[Cura retraction during fill?]

Hi!

When cura changes the xy position while inside an object it does not seem to retract. Can i enable that somehow?

The problem with the current behaviour is that the infill that gets printed over the stripes/dots caused during those moves results in an uneven finish :(

regards,

Simon