K8400 test object: please comment

Hello,

I’m new to 3D printing and I have bought a K8400. Printing material is genuine Velleman PLA.

For testing it I used a “ctrl V test”-object.
thingiverse.com/make:191631

Below are some pictures of the parameters and the result. It looks acceptable, but I think there are certainly some improvements possible.
One thing I noticed during printing is that, when printing the top layer, the printer paused for a few seconds. During this time a bit of PLA escaped from the nozzle. This created some surface “bubbles” on the next shape that was being printed.

Feel free to comment, as I have no experience in assessing control parameters.

It looks like you might be running the extruder a little hot.
If you are printing with PLA try 190C.
You might want to adjust the retraction in Cura settings to 4mm and the retractions speed 110mm

Okay, thanks for your advice.

Unfortunately my printing is halted due to a malfunctioning servo. I will try your settings when this problem is solved.

Also just started.

Still struggling with the more challenging objects, however judging by a simpler tests I must say that the capabilities of this machine amaze me.
Just a matter of finding the right settings I guess.

Here’s the first simple project I did, an LCD Cover.
This is printed at 190 degrees.



Now this looks good I can move on to bigger and better projects :wink:

Wrong Way, I tried your settings and they seems to make better prints.

Below is a comparison between
210 deg, retraction speed 70mm/s, distance 9 mm and
190 deg, retraction speed 110mm/s, distance 4 mm

I used the keyfob and the quality of the 190 deg is way better (for instance the surface roughness)
But the little piece to connect it to a keychain still is a problem.

Alfred, that seems a very neat print. May I ask what settings you used?

The temp is a good starting point.
For different colors and brands of filament you may have to tweak it little.
On some you may also need to adjust the flow rate as well.
But it looks like it’s starting to come around.
The stringing generally means that the filament is still on the warm side you might try dropping the heat by 1 or 2 degrees.

[quote=“caph10”]Wrong Way, I tried your settings and they seems to make better prints.

Below is a comparison between
210 deg, retraction speed 70mm/s, distance 9 mm and
190 deg, retraction speed 110mm/s, distance 4 mm

Alfred, that seems a very neat print. May I ask what settings you used?[/quote]

Same as yours, 190 - 110 - 4 :wink:
Different colours give different results haven’t tested the difference with just a few degrees difference.
I find that especially circular/curved objects are way more prone to failure or rough outcome.