Are you still worried about the printing effect is not good, the adjusting machine is not good, and the belt tension is not correct? Belt tension adjustment is the most important, related to the grain of the model 3D printer belt tensiometer reference value: The normal 2GT-6MM belt tension calibration reference value is about 5.2, Gates is about 5.3, and the high temperature non-slip belt is generally about 5.4 The normal 2GT-9MM belt tension calibration reference value is about 6.2, Gates is about 6.3, and the high temperature non-slip belt is generally about 6.4 Conditions and methods of use of 3D printer belt tension meter: 1. your machine belt must be leaked outside the machine, there is enough measurement space. 2. Slide the print head to one side and measure the middle position of the belt. 3. After resetting the measuring instrument, down the measuring button, lift the probe, clamp the belt in, place the belt on the two metal posts, and then release the measuring button to get the tension value of the belt. Material: plastic colour: blue+black Package Contents: 1 x 3D Printer Belt Tensiometer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.