Jump to content
Ultimaker Community of 3D Printing Experts
Food24

Estimated time on CURA

Recommended Posts

Dear All,

my question today is on the estimated printing time by CURA.

I have printed a small pyramid with a base of 29*29 mm and an height of 22 mm.

The estimated time by CURA is about 4 minutes.

My printer finished to print after 2 min and 40 s.

It is possible that CURA has some bugs which produce this type of error ?

I have this problem when i print at very low print speed of 11.21 mm/s while when I print at 16 mm/s and 21 mm/s the estimated time are close and lower than the actual times, respectively.

Maybe there are values of minimum Feed Rate at which the printer cannot move ?

From the display of my printer (a Delta Wasp 2040) i read this setting conditions

Vmax(x,y,z,e) 250 250 250 60

Vmin 0

Vtravel min 0

Amax(x,y,z,e) 20000 20000 9000 3000

Vx,y_jerk 20

Ve_jerk 5

Accelleration 3000

A_retract (e) 3000 - - -

Estep(x,y,z,e) 85.33 85.33 85.33 400

Food24

Share this post


Link to post
Share on other sites

I would prefer an overestimation of time as you show rather than underestimation.

I posted a similar topic and someone suggested that the quirks of individual printers may have slightly different timings on operations that cause the over-estimation. Also, if it follows some rules that are applied to other software (3D Rendering, animation, compositing) it will speed up and slow down based on a number of factors.

But, an overestimation is good by me :) Helps me factor time better. I would feel more comfortable telling a client 4 hours and have it done in 3 than to tell them 4 hours and it take 5. I have seen people get bit by that in a very, very bad way. Even saw some loose clients.

Dunno if this helps. But I can say that Cura had a bad rep for bad time estimations such as being 50% under (6 hours actual printing vs. 3 estimated) and have been pleasantly surprised that it is either spot on or a bit off by way of estimating a bit of extra time.

Share this post


Link to post
Share on other sites

> It is possible that CURA has some bugs

I can say with 100% certainty that Cura has some bugs.

> which produce this type of error ?

But this type of error is not caused by a bug but by a mismatch between your printer firmware and the default values that Cura has to use when the printer definition does not include values about how fast your printer accelerates/decelerates while moving.

Share this post


Link to post
Share on other sites

Dear ahoeben,

something is not clear yet.

Are the values about how fast my printer accelerates/decelerates while moving, defined by my firmware?

What do you mean when speak about ' mismatch between your printer firmware and the default values that Cura has to use when the printer definition does not include values about how fast your printer accelerates/decelerates while moving' ?

I known that the installed firmware contains the parameter by which the printer will move. By using CURA we only define most printing parameters which are contrained by acceleration/deceleration, jerk etc as defined in firmware.

Also, i would like to understand if CURA well define the movement of a DELTA printer or some bugs could be between the estimated movement and the actual one.

Thanks

Food24

Share this post


Link to post
Share on other sites

Are the values about how fast my printer accelerates/decelerates while moving, defined by my firmware?

Yes. The firmware in your printer manages a set of speed/acceleration/jerk values. And so does Cura. If the values don't match between the firmware and Cura, Cura cannot calculate a proper print time.

Also, i would like to understand if CURA well define the movement of a DELTA printer or some bugs could be between the estimated movement and the actual one.

I don't know, perhaps @Bagel-orb can tell.

Edited by Guest

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

    • Taking Advantage of DfAM
      This is a statement that’s often made about AM/3DP. I'll focus on the way DfAM can take advantage of some of the unique capabilities that AM and 3DP have to offer. I personally think that the use of AM/3DP for light-weighting is one of it’s most exciting possibilities and one that could play a key part in the sustainability of design and manufacturing in the future.
        • Like
      • 3 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!