Jump to content
Ultimaker Community of 3D Printing Experts
pieri70

Feature request - Extrusion multiplier - where is it?

Recommended Posts

Hello

I'm new to cura 3.x, I am trying to use it instead of some other slicers (S3D)

 

In Simplify 3d and many other slicers there is an option to fine tune and correct the extrusion, i.e. extrusion multiplier.

 

Where is this value located?

I thought it was in material management but it's not there and I can't see it elsewere

 

Thanks

Pietro

Edited by pieri70
change title

Share this post


Link to post
Share on other sites

Thanks I see...

But this is something that is not linked to a particular material.

I mean, different material could behave differently (by over extrusion/under extrusion point of view) to the same extruder settings (fine tuned steps/mm).

On my machine I fine tune the actual filament length extruded with caliper and set fine tuned steps/mm this is a value saved to my firmware (eeprom) settings.

Then Each time I change a filament spool I make a new calibration process, with thin wall - single shell hollow cube to measure if the wanted shell thickness is what is actually printed.

The ratio between what is "wanted" and what is "achieved" is my extrusion multiplier for a given material on a given spool.

So for example I print PLA Tech with 0.96  extrusion multiplier, Pla wood with 0,92, PETG with 1.03 and so on.

 

So I would expect to find extrusion multiplier in "materials" tab under preferences, because each "material" has its own fine tuned extrusion multiplier on a given machine..

Flow percentage in Cura’s settings panel is fixed for a given profile and doesn't change when I change printed material..

 

In S3D I can save extrusion multiplier with material settings, together with hot end/bed temperature and fan speed for first layer and consecutive ones.

 

Is it possible to do the same with Cura?

 

Thanks

Pietro

Share this post


Link to post
Share on other sites
41 minutes ago, pieri70 said:

Thanks I see...

But this is something that is not linked to a particular material.

I mean, different material could behave differently (by over extrusion/under extrusion point of view) to the same extruder settings (fine tuned steps/mm).

On my machine I fine tune the actual filament length extruded with caliper and set fine tuned steps/mm this is a value saved to my firmware (eeprom) settings.

Then Each time I change a filament spool I make a new calibration process, with thin wall - single shell hollow cube to measure if the wanted shell thickness is what is actually printed.

The ratio between what is "wanted" and what is "achieved" is my extrusion multiplier for a given material on a given spool.

So for example I print PLA Tech with 0.96  extrusion multiplier, Pla wood with 0,92, PETG with 1.03 and so on.

 

So I would expect to find extrusion multiplier in "materials" tab under preferences, because each "material" has its own fine tuned extrusion multiplier on a given machine..

Flow percentage in Cura’s settings panel is fixed for a given profile and doesn't change when I change printed material..

 

In S3D I can save extrusion multiplier with material settings, together with hot end/bed temperature and fan speed for first layer and consecutive ones.

 

Is it possible to do the same with Cura?

 

Thanks

Pietro

Not that I am aware of.

  • Like 1

Share this post


Link to post
Share on other sites

I am not the one to ask about adding this feature. But hopefully the powers that be will see this thread and make note.

 

Also, you can create material profiles and make all the adjustments to them. Just open up settings and go to materials. You will find a 'wizardy' sort of interface to help you through. Not really a wizard, but an easy interface.

 

If you are making a new one, just duplicate an existing profile and then edit to rename and put in your values.

 

Nowadays, I just make dummy project files with proper labels with each set of values pre-edited. This way your project files should always load and not have issues between upgrades. And, it does not clog up your whole interface.

 

Up to youse ;p

Share this post


Link to post
Share on other sites
18 minutes ago, kmanstudios said:

If you are making a new one, just duplicate an existing profile and then edit to rename and put in your values.

Ok now I see, I must duplicate a material and then rename it and it's brand and a new section appears under brands..

Not much intuitive.

 

By the way, extrusion multiplier could be a nice addendum

 

Thanks again

Pietro

Share this post


Link to post
Share on other sites
2 hours ago, pieri70 said:

Ok now I see, I must duplicate a material and then rename it and it's brand and a new section appears under brands..

Not much intuitive.

I would say that depends on the individuals experience. For instance, people trained on Windows think the MAC is a mess and vice versa. Intuitive is over used these days IMHO. As software got more and more powerful and in depth, it kinda lost that value.

 

2 hours ago, pieri70 said:

By the way, extrusion multiplier could be a nice addendum

 

Thanks again

Pietro

I think this is a case of the same thing being called a different name. CG is full of messy nomenclature. Such as one function that has been around since we carved our keyboards out of clay tablets is "Surface of Revolution." But too many programs call it something else like ' lather' or 'revolve.' Surface of Revolution is the proper name and it should be called that.

 

And you are quite welcome :).

Share this post


Link to post
Share on other sites

Hello,

coming back to this post to clear some doubt.

 

In Simplify3d there is the "flow" parameter that for a 1,75 filament should be lowered if in over-extrusion and risen if in under-extrusion condition.

If I correctly understand  this can be achieved, in cura 3.2.1, changing filament diameter, with lower diameter for under extrusion condition and higher diameter for over extrusion.

Am I right?

 

Then

there is some problem in filament selection in cura

If I create a new filament and I set all parameters (temperature, retraction speed, filament diameter..) and I select a filament from the drop down list in printing profile, then the diameter of the filament under material section is not updated.

I must close and restart Cura (version 3.2.1 on MacOSx HSierra).

Anyone could confirm this?

 

Thanks

Pietro

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

×

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!