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rich080487

XT-CF20 settings help...

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Posted · XT-CF20 settings help...

Hi,

 

I have a UM2+ with a Bondtech extruder (recently fitted) and a ruby nozzle.

I have been experimenting with ColorFabb XT-CF20 over the past few days. I have been struggling with getting my settings spot on...

I first used the average settings suggested by colorfabb (250degC, 65degC bed, 50% fan, 55mm/s print speed, plus other standard settings).

My first print created lots of stringing, so I designed a basic part to test for stringing and tried again...

 

Capture.thumb.JPG.7ffa00b567ea042d4da2075af10964e5.JPG20190610_143449.thumb.jpg.2ce6ace71aa0c25d60cd79b9ca20442c.jpg

 

To counteract this I tried reducing the temp to 240degC and increasing retraction length to 10mm. This definitely helped, but it still isn't perfect (especially at the top of the prints).

 

I have tried a number of prints varying print temp and retraction length to try and reduce the stringing. I still can't get a perfect result.

My second print is the best one, but there is still a very small string at the top of the print and looks like it might be starting to under extrude.

 

IMG_20190612_144814.thumb.jpg.3c0494db6215d6e73531e3506ef52d05.jpg

 

I am going to set off another print, but at a slower speed to see if that helps. Does anybody else have any further suggestions?

 

TIA,

Rich

 

P.S. The nozzle also gets caked very easily. Any ideas? (hoping this is unrelated)

 

 

20190610_143449.jpg

IMG_20190612_144814.jpg

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