Support not printing fully.

[Rebekah_harper]

Hiya everyone.

I've had some issues. When printing the support starts to fail the higher it goes. Basically it's seems to pile filament onto the support but doesn't bridge the gap. Eventually it just looks furry.

I'm using a 0.2mm nozzle at a height of 0.1mm at 15mm/sec .

I can add the factory file I needed.

[DarthRevan]

Could you post some pictures? I can't quite visualize what you're describing.

[Rebekah_harper]

here are some images of the problem.

I am using a 0.2mm nozzle.

[Rebekah_harper]

This one is part of the same print group as the picture above. so you can see it can print quite well

problem I have is that when I reach the top solid layers it's just can't stretch accross in one piece. It just looks torn up and full of gaps. not a solid layer over the support.

I am wanting to understand what the cause is for this problem to occure.

[jimmybuckets]

It's hard to tell from your pictures but it looks like you could be over extruding...which is causing your hot end to drag though already layed down layers. Make sure you are measuring the diameter of your filament and enter that into S3D. Draw a 2 inch cube in cad then slice it with one bottom layer, one perimeter, zero infill and no top layers. This will give you a single wall print that should have the wall thickness match what S3D has for extrusion thickness. If it doesn't then adjust extrusion multiplier and reprint until your average thickness of the print wall matches extrusion width. Measure using only the top few layers.

[MFitz73]

not for nothing.... but clean that nozzle off!

[jimc]

Ok it looks like you have multiple support angles. This means that each angle is printed on its own layer like rectilinear infill. What happens is you have a ton of little bridges going on there. You are going to get cleaner support if you print on 1 angle because every startnd is lined up and printed on another. Having a broken and fuzzy support or infill situation is usually due to underextruding and temps too high. With rectilinear infill we could overcome this with turning up the infill extrusion width. You have no such setting with support. So in a nutshell, go back to a single support angle and drop your temp a bit

[Rebekah_harper]

I will give that a go.

the number of angles was 2 0deg and 90deg. but I will give a single angle a go.

those cubes were coming out with a margin of error of 0.01mm so I think the exrusion is spot on.

not sure what to do about the temp as that was set at 230. might drop it a bit.

cheers guys.

becky

[Rebekah_harper]

something I noticed is the GCode entries.

(dual extrusion, right T0 = 0.2, left T1=0.4)

the hieght and width for the extrusions are nicely added to the code and splits it up in nice sections.

the thing I've noticed is that the height is 0.01 off a rounded number so instead of layer 2 being 0.2 it's 0.21 why is that. because I thought the axis were zeroed before the print starts.

in additions it's stating widths of 0.3 at times and I am not sure where that comes from.

could someone have a look at the GCode and possible spend a little time explaining why some of the things differ from what I set up. I kinda think that its alowing for actions to be performed but I don't know.

GCode is stil a bit of mistery to me but I understand some of their meaings but yet to understand why.

cheers in advance.

[jimmybuckets]

If you are sure you are extruding the right amount and your temps are good. I have in the past run into my filament slipping because of a loose extruder spring or too much pull back from a role that's near it's end.