On the first layer of my pla print, the right side of the bed prints perfectly well, but on the left side, the nozzle prints around 0.5 mm in the air. I tried printing something similar with petg, but it was fine. Also when it was bed leveling before the print, there was a little bit of lag when leveling from the right to the left. Here is a video: https://www.youtube.com/watch?v=vhHvcK3pAas
also this a1 printer is about two weeks old, with about 150 hours of print time.
Your video is too short, missing the important bit and cuts off early.
It is hard to work out what is happening.
You say the nozzle is printing in the air, but it appears to have swapped filaments and started a new layer.
Not knowing what happened before the filament swap occurred or the model you are trying to print, everything we can offer will be guesses at best.
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Perform a single-layer test
If you do not have one to hand, use mine. These are used to print a single layer over the whole build plate to determine issues that require addressing.
These can be: bed adhesion, levelling, and extrusion issues (over and under).
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Reseat the build plate
Remove the build plate and make sure it is put down again without sitting on any part of the printer or the location blocks at the back.
You are confirming that you have accidentally seated the plate badly.
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Enable bed levelling
Make sure you haven’t turned this off
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Print a simple box in the middle of the bed.
Start a new build plate, add a primitive cube and set the dimensions to 20mm for x, y, and z.
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Repeat with one in each corner
Duplicate the first test with four more (making five), one in each corner and one in the centre.
What differences occur?
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I think I discovered the reason—After I modeled the file, I accidentally left one part 0.5mm off the ground, so when I imported the model into the slicer as one whole object, that one mesh body was also left .5mm off the build plate. I think that is the reason why.
Thank you very much for providing me with lots of solutions!
So, this then.