CR-10 V2 Z-Axis Timing Belt Tensioner

thingiverse

When disabling the stepper motors and manually leveling, I noticed that the X axis rail could become misaligned since the Z axis stepper lead screw would turn unevenly on one side but not the other. A timing belt may prevent this issue entirely. I also believe that this modification may synchronize the two Z motors more closely than stock, possibly resulting in even layers. For the new Z mounting blocks that provide room for a pulley, I used FattyGuyRiley's design since it doesn't cost any Z height: https://www.thingiverse.com/thing:3504265 I couldn't find a simple belt tensioner that fits FattyGuyRiley's belt height, so I designed one in Sketchup. You'll need: - 4 M3 T-nuts, which you can find here: https://www.thingiverse.com/thing:3050607 - 4 M3x8 screws - 1 M4X20 (or 30) screw - 12 M3 washers (unless you resize the thickness of the tensioner bracket) - 4 M3 nuts - 2 GT2 Timing Belt Pulley (20T, 8B): https://amzn.to/2t7D9eo - 1 GT2 Toothless Timing Belt Idler: https://amzn.to/2NxzCxh - 1 GT2 760mm-2GT-6mm 380 Teeth Timing Belt: https://amzn.to/2uFYBI1 There is some adjustability of this tensioner if you use this size belt and pulleys. When it's all assembled, make sure your Z screws still have some front and back movement in the bearings and nothing is too tight to the point of binding (very important). ***** Warning: even at its loosest setting, some belts may still be too tight. You may want to shorten the reach of the tensioner bracket for your specific use *****