Cura - Control extrusion speed

[jot4p 0]

Hi, 

I use cura for my CONCRETE printer. 

I need to know where is possible to configure the extruder (motor) speed independent of the xyz axis:

G1 F1980 E0 << retraction is ok (10mm/s) 

G1 F600 X110.419 Y137.472 E73.3386  << Here I have the same speed for xyz and E axis

I need to create a indepent value for E ... it's possible on cura ?

 

Thanks.

 

[burtoogle 509]

30 minutes ago, jot4p said:

G1 F600 X110.419 Y137.472 E73.3386  << Here I have the same speed for xyz and E axis

 

No, the F600 applies to the X/Y movement only. So the move to those coordinates from the current position will take a certain amount of time, let's call it T. While that X/Y move is happening, the extruder will extrude 73.3386 units of concrete (in M^3, perhaps?!) and so the extruder rate will be 73.3386 / T.

[jot4p 0]

OK. It's possible to increase the amount of concrete? 73.3386 / T.

[burtoogle 509]

On 7/5/2018 at 4:22 PM, jot4p said:

OK. It's possible to increase the amount of concrete? 73.3386 / T.

 

Yes, there are various parameters that influence the extrusion rate. If you want to modify the extrusion rate without altering the line width or print speed then I would have thought that the Flow setting in the material section is the one to go for. By default it is 100% but you can make it larger or smaller and that will scale all extrusions.

[jot4p 0]

On 7/6/2018 at 8:20 PM, smartavionics said:

 

Yes, there are various parameters that influence the extrusion rate. If you want to modify the extrusion rate without altering the line width or print speed then I would have thought that the Flow setting in the material section is the one to go for. By default it is 100% but you can make it larger or smaller and that will scale all extrusions.

But If I increase the flow from 100% to 200% the speed is 2x less.... 


 

[burtoogle 509]

1 minute ago, jot4p said:

But If I increase the flow from 100% to 200% the speed is 2x less.... 


 

Why is that?

[jot4p 0]

1 minute ago, smartavionics said:

Why is that?

The double amount of material for the same distance is equal to slow speed of x/y for the same speed of extruder..  I don't understand why is not increased the speed of extruder maintaining x/y speed..