[Is this stringing due to moisture?]

Below is an example print from my S5, AA 0.8 core, using the Ultlimaker Nylon material - pretty much fresh from a new package.

 

Perhaps I'm too naïve when it comes to nylon, but I was hoping that the default settings in (the most recent) Cura and S5 firmware, coupled with a new package of material would yield decent prints. However, as you can see, this print is a bit of a mess.

 

For reference, the Cura settings I used were the default for a "fast" print:

 

AA 0.8 core

0.2mm Layer height

20% infill (triangles) (likely no infill was used in this smallish piece)

245 deg C print temp

70 deg C plate temp

35mm/s print speed

Retraction enabled

Print cooling enabled (fan speed 40%)

Brim adhesion 

 

 

Despite this being a new spool, do I need to dry it out? I don't really think using my oven at home is a good idea, so are there other practical options?

 

 

[Strange ancillary shape using nylon and slicing with Cura 4.4]

Designing the supports is certainly an option, but increases the workload quite a bit for me as I am not an experienced CAD designer. However I may give this a go because I can't seem to find a decent group of settings in Cura to get this to print properly.

 

Your designs look beautiful btw!

 

 

[Strange ancillary shape using nylon and slicing with Cura 4.4]

I did let the print finish and it was somewhat of a disaster. The travel between the tower and my part was rife with strings which created quite a mess.

 

I've abandoned the use of the PVA support material - which removed the "prime tower". I'm using the nylon itself now as its own support material. It prints much better, but removing that nylon is a chore.

[Strange ancillary shape using nylon and slicing with Cura 4.4]

Hello community,

 

  I am a routine user of our Ultimaker S5. Up until now, I have only used PLA and PVA for supports. However today I switched to nylon for strength reasons (all consumables are Ultimaker branded). After changing materials, I ran Cura (v4.4) and it updated the settings within the software. I sliced my model and dutifully sent it to the printer, then went on with my day.

 

After a few hours, I went to check and saw something really odd -  not only was my shape printing (along with PVA supports), but there was a "phantom" shape in the corner. A cylinder of (apparently) the same diameter of my model. 

 

Going back to Cura and viewing the preview, I now see that it (Cura) did indeed make a shape off in the corner. 

 

Is this a feature specifically for nylon? If so, where do I find that defined or documented in Cura? 

 

If this is not supposed to happen, can anyone explain what is going on?

 

I've enclosed images of the cura windows - both the model alone and the preview pane.

 

[Strange "dots" in cylindrical slices]

Hello community,

I created a cylindrical shape to test different parameters of my Ultimaker 2+ and different brands of PLA. I use the tweakAtZ (4.0.2) plugin with Cura (15.04.6) to change the hot-end temp every 10mm up this cylinder.

I opted to print out two of them to check for stringing issues - so just loaded the STL file twice.

When I began printing, I noticed an odd behavior - which I also found by looking at the layer view in Cura. The gcode doesn't print out smooth circles for each layer - it first lays down a few dots on the periphery (within the wall) and then does the circle. See image.

This isn't working out very well - when the nozzle moves back around in the "proper" circle, it hits the dots and the print bed then shudders a bit.

Can anyone tell me why this is happening, and how to avoid it?

Thanks!