Random layer shifts

I get this strange error while printing. At some layers the print is shifted to one side. Strangely i can print the K8200 board cover without any problems. And a small frog. But this car and some other items i just cant print without getting this problem.
i60.tinypic.com/jg15ys.jpg

Please host pictures somewhere that isn’t a browser grabber!

That looks like the X-axis shift I was getting. The X-axis is the heaviest (it has to carry the Y-axis) and certain moves cause trouble.

Lower the jerk settings for both axes to 15mm/s and acceleration to 3000mm/s/s

Is it possible for you to post a screenshot so i can see where to find this setting?

The changes are made in firmware or EEPROM.

See; youtu.be/7HsIZuj9vOs?list=UUb8Rd … ROUVg46h1A

Also look at Tom’s firmware videos and others.

Hoejdata,

Is that happening on the X axis?
If you have the version 1 firmware you should check the log area for end stop hits (same for the Y axis)

Check if your belt isn’t too tight, that was causing the same problems for me.

I had the same issues first.

Then i rechecked my belt tightening.

set it tight, but not clampy. (belt should be bendable with slight finger pressure)

Then i set the Stepper driver voltages up to 0.55V for all axes.

And finally i reduced jerk and acceleration values.

Now it prints very well, even at 15ß or 200% speeds.