Printing on a slat
Hi;
Any idea what's wrong with this? I checked the bed with the upper rails, they are square. All calibration has been done per the manual...
You have some layer shifting, there are a few possible causes:
First, your print sheet is dirty, clean it with dishwashing detergent (Dawn/Fairy) and plenty of HOT water, rinse well and dry with a fresh paper towel. Handle by the edges only.
Please run a first layer Z calibration and show us the print on the sheet.
Your belt(s) may be catching, or wrongly tensioned:
With the power off, move the axis by hand; is is smooth? Does the resistance stay the same over the whole range?
Clean and lubricate the smooth rods, check they are not damaged/scratched. Check the idler pulley is not clogged, out of line, or damaged (loosen the belt and try turning it with your fingertip, is it smooth?)
With the belt loose try turning the stepper motor by hand; is it smooth?
Retighten the belt until it just begins to make a low musical note when plucked...
Make your next print this:
https://www.prusaprinters.org/prints/46639-tension-meter-for-the-gt2-belts-of-i3-mk3s-or-prus
It MUST be printed in Prusament PETG or the spring tension will be wrong.
Cheerio,