Hi folls, Every time I print a benchy, in slic3r, craftware and s3d I get 2 layers that contract and leave an ugly band in the print. Similar layer size differences happen on other models are visible on straight walls on layers with areas of solid fill. I’m using a tevo tarantula with the latest popular community firmware with the prusa i3 settings with retraction changed to 4mm at 80mm/s, I’ve tried printing much slower and with a range of temperatures. The links below show an example and my settings.

If you are getting this on multiple models with multiple slicers then I think you may have a hardware issue. Not really sure what it might be though.

Check the tension on your belt make sure it is not too tight or to loose

both are tight enough, but not tight enough to bind, and tuned to the same frequency, so should be equal in all respects.

OK, Great so the next thing is to test the slic3r one thing to try is in slic3r look for extrusion multiplier and add about 200% to it see if that changes anything and let me know. What are your settings?