Jump to content
Ultimaker Community of 3D Printing Experts

ChangeAtZ5.1.1 slowing down the print

Recommended Posts


I sliced a large 3D-Model of a Building in Cura, and used the ChangeAtZ5.1.1 Post processing plugin (experimental, i know...) to slow down specific layers.

I set "Trigger" to "Layer No.", entered the Layer, changed "Behaviour" to "Single Layer" and then "change print speed" to 50% and repeated this for 11 specific layers. First it seemed to be ok, but now 5:30h into the print it slows down so much, that it is almost at a standstill. It seems to not accelerate back to 100% after the Single Layer as intended. I tried to compensate by turning the speed on the printer up, but that is limited to 999%, and even that is now about 10mm/s. At this rate this 8h print will probably take a few days to finish.


a) is there a way to revert the speed back to normal without aborting the print?

b) did I use the plugin wrong?


hope you can help me,



Share this post

Link to post
Share on other sites

If you change the print speed the script changes all print speeds in the gcode from that point on. So if you use the script once, print speeds after the trigger layer are effectively reduced to 50%. If you use it again, it will depend on the output of the first usage and reduce the print speeds again by 50% (so 25% now compared to the original value).

If you want to change up and down, you have to implement a 50% change and then a 200% change for print speed.

Share this post

Link to post
Share on other sites
5 hours ago, tinkergnome said:

with other words: "Behaviour" = "Single Layer" doesn't work like one would assume?



I managed to get the speed back up by typing M205 S60 into octoprints console. I won't use this Plugin anymore, simply pasting M205 S30 for example directly into the gcode of the specific layers and M205 S60 in the next one is probably safer.

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

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
        • Like
      • 97 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 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!