Jump to content
Ultimaker Community of 3D Printing Experts
DaHai8

Increase Print Time Estimate Accuracy?

Recommended Posts

I was wondering if there was something I could do to increase the accuracy of the print time estimate after slicing.

In both v15.x and 2.1x, the current estimates are around 20%-25% under. In other words, if Cura estimates a 8hr print, it will take closer to 10hrs. For a 1hr estimate, its usually takes 1hr 15 mins.

Maybe this is just an artifact of a non-Makerbot printer or its firmware specific. I read some previous posts from a few years back about acceleration factors. So maybe there is a tweek I can add to a parameter in Cura (15.x or 2.x) to take this into account and narrow this delta a bit?

Wondering if anyone else is seeing this delta or if its just me and my printer.

Thanks!!!

Share this post


Link to post
Share on other sites

Cura used to always be inaccurate in predictions but then they included most of the marlin planner mechanism into the planning and now it's spot on - around 1% error. But they used the acceleration and jerk settings for a typical Ultimaker and even Ultimaker people mess with that. Ultimaker is 25% faster at the speeds you print (because of the higher acceleration). So one solution is to buy an ultimaker. :)

Share this post


Link to post
Share on other sites

Found the fdmprinter.def.json file on GitHub and have been trying to insert the Acceleration and Jerk settings for about 3 hours last night before giving up. I thought maybe they weren't implemented yet, but then saw this post:

https://github.com/Ultimaker/Cura/issues/798

Clearly, I'm doing something wrong. Any help on this would be greatly appreciated:

 

"speed": {       "acceleration_enabled": {           "label": "Enable Acceleration Control",           "description": "Enables adjusting the print head acceleration. Increasing the accelerations can reduce printing time at the cost of print quality.",           "type": "bool",           "default": false,           "settable_per_mesh": false,           "settable_per_extruder": false       },       "acceleration_print": {           "label": "Print Acceleration",           "description": "The acceleration with which printing happens.",           "unit": "mm/s²",           "type": "float",           "min_value": "0.1",           "max_value_warning": "10000",           "default": "300",           "enabled": "acceleration_enabled",           "settable_per_mesh": true       }   }

 

Edited by Guest

Share this post


Link to post
Share on other sites
The nightlies of Cura can have jerk & acceleration set per "feature"

Very cool but that doesn't answer my question.  Are these accelerations used to calculate the print time or is print time calculation not configurable (hardcoded)?

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

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
      • 14 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
      • 18 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!