Felix printers Felix 2.0 Instruction Manual page 25

When you turn the bolt clockwise the belt will get more tension.
Put some double sided tape on the opto-sensor and mount it onto the
bracket with the small philipshead screws.
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Assembly instruction manual FELIX 2.0 3d printer
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It finally should look like the picture above. This however is a picture
from an older revision.
Cut off the remaining piece of belt. Only 2cm should stick out of the end
of the extruder base. Don't waste any belt. There is only one long
belt in the kit, which must be divided in such a way that it is usable
for the x and y-axis.
You have now finished the x-axis!
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