Ender 3 X-Axis Belt Tensioner Spacer
thingiverse
I started to notice some X-Axis issues so I dove into the subsystem right away. The first thing I checked was the belt tension, and after adjusting it several times, I couldn't get the belt centered inside the 2020 no matter what. No matter how I adjusted the tension and tightened screws, the belt would always veer off to one side. But I found a solution! Here are some shims/spacers that helped me move out the X-Axis tensioner so it's centered along the 2020 channel. What worked for me was using 2.4mm.
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