Jump to content
Ultimaker Community of 3D Printing Experts
Sign in to follow this  
maxmk

Printing PVA support

Recommended Posts

Hi everyone!

I am trying to print a complicated part with PVA as support.

Cura already does a great job at this with activated purge tower and

temperature difference.

There are only two things that annoy me:

The tower goes all the way to the last layer, meaning that I get a few hundred unnecessary extruder switches. It would be great if the support extruder would just cool down when all supports are finished.

Another important thing for PVA support would be a roof for the support. Just two layers on top of the support would make the surface of the print much nicer.

Is there any way to do this manually or will those features be in a future Cura release?

Thanks in advance!

 

Share this post


Link to post
Share on other sites

Hmmm....

Regarding the first suggestion you could try to slice the model 2 times - one with and one without support and exchange the upper part where no support is needed any more with the gcode from the slice without support... and add a line for cooldown the PVA extruder (M104?)...

Can you follow...? Don´t know if it well explaines what I have in mind... :-)

I don´t know if this could work but I remember a discussion regarding a plugin for change infill...

 

Share this post


Link to post
Share on other sites

You mean the https://github.com/pmsimard/Cura/raw/SteamEngine/plugins/swapAtZ.pyplugin by http://umforum.ultimaker.com/index.php?/user/35529-pm-dude/... ;) Everything in there except the M104... which can be realised by the https://github.com/Dim3nsioneer/Cura-Plugins/wiki/Tweak-At-Z-pluginplugin... (which is available since today in an all new version btw. :) )

 

Share this post


Link to post
Share on other sites

Yes, that´s what I mean...

@ MaxMK, maybe worth trying with it... :smile:

Did a brief test - it´s working, just the order of generation of the files has to be considered

- first slice without support and second nozzle setting

- safe file

- slice same configuration with support and second nozzle setting

- past path to first file in the plugin

- define hight where no support is needed any more (in mm!!!)

- safe file again and open gcode-file in layer view to check :smile:

Maybe there is a chance to get a updated version of PM_dude with layer selection - I´ll ask him :smile:

 

Share this post


Link to post
Share on other sites

B.t.w. - with this you could also get a solution for the second part of your request

Just generate the support as a seperate part, merge it in CURA dedicated to the second nozzle and get a top support layer as normally used for a part...

Then use swapAtZ to modify the gcode where no support is needed any more and end with tweakAtZ for cooldown...

Might work but needs a lot of more PVA than just support...

 

Share this post


Link to post
Share on other sites

Might work but needs a lot of more PVA than just support...

 

I thought about that, too, but for high quality prints one meter more or less does not make much of a difference.

Another problem would be to create those supports in CAD. That can be quite a lot of work.

 

Share this post


Link to post
Share on other sites

That´s true - but depends on your CAD. As far as I know in SolidWorks there is an option to create molds so that´s maybe used to create a support structure too...

B.t.w. pm_dude replied that the swapAtZ has not been tested the second nozzle support (also I did just a brief basic test...)

 

Share this post


Link to post
Share on other sites

Hello,

Joining in a little late (3 days of stacked new topics and replies :D). Yes the layer number could be added. Also please check the resulting gcode afterward to make sure the swap of layer and the tweak at z interact well together. I had cases where the other plugin would get dismissed due to the swap.

There should be no real problem with the second nozzle but unlike the first nozzle, the material amount will not be adjusted to take the swap into account.

 

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
Sign in to follow this  

Announcements

  • Our picks

    • Architect Design Contest | Vehicles.
      We're open for entries! - Design and submit your 3D designs of architectural entourage - vehicles - for a chance to win a large filament pack. Presenting an idea, an architectural design or something as big as an urban project isn't easy. A scaled model can really help to get your idea across.
        • Like
      • 26 replies
    • What The DfAM?
      I'm Steve Cox, an experienced engineer familiar with 3D printing. I wanted to share some DfAM guidelines with this community to help and make stronger parts.
      I'm also an Autodesk Certified Instructor for Fusion 360, so many of the images in ...
        • Thanks
        • Like
      • 23 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!