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Nicolinux

Advice for printing with Colorfabb XT

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Hi,

I'd like to ask for some advice for printing with Colorfabb XT (non transparent). I printed this object on an UM2

 

with the following settings:

 

  • layer: 0.2
  • shell: 0.8
  • retraction: on
  • bottom/top: 1.2
  • infill: 50
  • speed: 50
  • combing: off
  • fan full on at height: 1.5
  • temperature: 245
  • bed temp: 70

These settings were suggested on learn.colorfabb.com:

 

 

However, the print looks really bad.

fanbase 01

fanbase 02

fanbase 03

fanbase 04

 

It is pretty stringy and blobby. Also there is underextrusion or at least it looks like it. Maybe there is a difference between transparent XT and the new one?

 

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I didn't try the colored XT yet, but i think you get better results with no Fans, except that your settings look good to me.

If you get some under-extrusion at that temperature maybe you could go for 0.15mm layers instead of 0.2mm ?

And to reduce the stringing you can raise the travel speed to 200mm/s it works good for me (i think you can go up to 250mm/s but i didn't test this)

 

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If I look closely at the picture it looks that the temp of 245 is too high.

All those blobs and (almost) drooping filament at the corners of the object.

My suggestion is to print at 240C on a UM2, with a fan speed of 50% and a layer height of 0.12 or 0.15mm.

 

Hi Harold,

Good suggestions about the temperatures. In addition to lowering the temperatures you can also lower the speed slightly, usually 40mm/s for best quality prints and increase the retraction speed, this is standard at 25mm/s but can be increased to 45 mm/s.

When lowering the temperature, don't be afraid to go lower then 240C. We have one UM which is able to print at 225C, 0.2mm layer height at 40 mm/s, although this is probably a temperature error.

cheers,

Gijs

 

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My last print with XT (clear) was at 235, no fan, enclosed with 0.08mm layer. The print was amasing and overhands up to 70 degrees printed well but it was having quite a few strings. I'll have to play with retraction.

The only problems I really have with XT is support removal. The seems to fuse with the print pretty badly and can be hard to remove without breaking like plexiglass...

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Hi Harold,

Good suggestions about the temperatures. In addition to lowering the temperatures you can also lower the speed slightly, usually 40mm/s for best quality prints and increase the retraction speed, this is standard at 25mm/s but can be increased to 45 mm/s.

When lowering the temperature, don't be afraid to go lower then 240C. We have one UM which is able to print at 225C, 0.2mm layer height at 40 mm/s, although this is probably a temperature error.

cheers,

Gijs

 

And how do I get maximum inter-layer adhesion? I'm trying to print something 4 shells thick (1.6mm) and get a very crispy result meaning it breaks all the time. I'm using XT red on my UMO.

 

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@UltiArjan: Printed it at 0.15 layer height, 40 speed and 240°

@hreedijk: I used the cooling fan but it came on late - at 25mm. On the second run I printed the object with 40% infill and with raft. Due to a bug in Cura, the fans come on instantly when using raft :/

@swanbennekom: Cool test. Which material does it apply to? XT only?

 

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