Tevo Tarantula X axis belt tensioner

thingiverse

An unusual issue reported by users about the Tarantula is that the X-axis belt does not run parallel to the axis, resulting in some unwanted Y-movement on the carriage. This design addresses this problem by incorporating adjustable idle pulleys made of high-quality 608 bearings. Initially, a different type of pulley was used, but they turned out to be of poor quality and failed to rotate smoothly, prompting a switch to the 608 bearings solution. To implement this fix, you'll need to print two brackets and provide two 608 bearings along with four M4 screws and their corresponding T-nuts. The end of the shaft also allows for an M4 screw with a 4x12mm washer to be installed, but in most cases, this should not be necessary since the 608 bearing fits securely on the shaft.