Jump to content
Ultimaker Community of 3D Printing Experts
Sign in to follow this  
tomnagel

first three layers show increasing offset in Y

Recommended Posts

My Ultimaker is less than 3 weeks old, so I have little experience yet.

I did make some ok prints, but the last three object all show a strange phenomenon: the first few layers show an increasing offset in Y direction, so when I look at the object from the side of the Ultimaker, the side of the object should be perpendicular to the print bed, but it looks like a stairs.

To be very specific: layer 2, 3 and 4 each shift around 0.2mm (one wire thickness) w.r.t. the layer below. After that, layer 5 and further are perfectly on top of each other.

The first time this happened I had increased printing speed to 75mm/s, and I assumed the Y-stepper had lost some steps in the first part of the print. But it is reproducable, also with speed back to 50 mm/s.

I have been editing the start-Gcode to lift the printbed a bit after homing the Z-axis (which by the way didn't work). I don't see any relation to my problem, but maybe there is.

Any help is appreciated.

Share this post


Link to post
Share on other sites

It's called "layer shifting" and while right now you have it on the first few layers, it could happen on any layer. What you should check is:

* Does the Y motor have enough power

* Are your pulleys firmly attached to the rods

* Are both your long AND short belts tight

It could also be that your start height is too low, and that the head moves into the first layers during the print of the next layer, but this usually also results in other problems.

Share this post


Link to post
Share on other sites

I am relatively new to this, I bought an ultimaker original that was a few years old from somebody and put the newest version of the electronics in (1.5.7), I also upgraded the extruder and hotend. It prints small objects perfectly every time, but when I tried to print a larger object every layer from the start of the print to the end slides down the y axis (about .5mm) each layer. I have tightened the drive belts, lubricated all of the shafts, and tightened all of the set screws, reinstalled the firmware. I don't understand what else it could be and it doesn't make sense to me that its only on prints that take up a large portion of the bed. Any advise would be greatly appreciated.

 

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
Sign in to follow this  

  • 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!