Jump to content
Ultimaker Community of 3D Printing Experts
neotko

Perfect Last top layer

Recommended Posts

Just an idea, that I haven't seen on slic3r, cura or simplify3d, and that would be kinda useful to make stuff 'look' better.

Allow slower speeds for 'last' top-layer. We can place speed for fill layers, or perimeters or inner perimeters, but not for the 'last' top layer. And we all know that to print stuff that looks nice we need to print slower to have a nice finish without holes on the fill, etc.

Also, it would be really nice if we could set parameters for the 'last' top layer, the one that it's visible, like:

- Ofc, speed reductions % or direct mm/s

- Z movements to avoid crossing and making the last layer look nice.

- Or instead of Z head move, a parameter to 'surround' and move the head only on perimeters (like combing) or to force the head to move around the empty area (ofc this could make 'drip' so user can set this if necessary, since each object have different needs).

Ofc all this can be achieved by setting the print speed lower, but what I mean it's to print fast, and only make the last top layers slower, since it's the part that can only be controlled for the full object, not just the visual part.

This way we could make the last top layer of texts or specially big flat layers, to really shine, making the interior of the object less beautiful and print faster.

  • Like 2

Share this post


Link to post
Share on other sites

There is top / bottom speed in Cura, it was mentioned a while back that it's hard to detect the last top layer as there can be many top layers in a model.

The top bottom speed works well as long as you dont go too slow then it can end up 2 hot. Just a few mm/s seems to work best.

Slowing them down increases the print time heaps though.

Share this post


Link to post
Share on other sites

Well the speed it's a factor but it could be really nice to have the z and combing or new path detección for just the least top layer. But of it's hará to detect them nothing. For big objects most of the z movements and stuff to make good finish are a waste of time until it reaches the last layer. Ofc depends a lot on the model and it could done by separating the top layers on different objects, but that on 3D software it's also a bit hard to manage.

Share this post


Link to post
Share on other sites

And what about this idea:

A manual toolbox to 'click' while viewing the gcode layers that males a list of the layers the user want to have a list of options like:

- Z hop

- Retract while crossing spaces

- Slower speed

This way to 'custom' an object it would be faster and easier to manage.

Share this post


Link to post
Share on other sites

if I remember right, someone said, that in the new cura you can assign different profiles for different layers. or is it planned but not yet implemented? that would match your last suggestion quite well.

you often have no distinguished top layer, look at the treefrog for example.

  • Like 1

Share this post


Link to post
Share on other sites

I think it is a great idea. Sure something like a tree frog would not benefit probably but I have plenty of stuff where a pristine top layer would be great. Which is not to say one cannot get a good top layer but the slicing sometimes seems to take an odd route if one considers the optimum result to be a perfect layer.

  • Like 1

Share this post


Link to post
Share on other sites

if I remember right, someone said, that in the new cura you can assign different profiles for different layers. or is it planned but not yet implemented?

 

Planned, not quite implemented. You can assign different profiles to different objects on the build plate.

Share this post


Link to post
Share on other sites

Planned for me just sounds fantastic. No other slicer can do that, and to be able to select profiles for different layers, or for a layer, that would make a total difference when going for good looking finish without having to speed down the whole print.

  • Like 1

Share this post


Link to post
Share on other sites

Well on simplify3d you can split the job and do that ofc. I use it. But imagine an object with toons of flat layers, you should need to resplit it on 5-10 and also when splitting it thinks it's a new object, so new bottom layers, top layers. For a box it perfect, for something more complex it's a mess but doable.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Our picks

    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 replies
×

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!