Dual Z lock for the CR10-500

thingiverse

Dual Z lock for the CR10-500. I've encountered some problems where the two sides get out of alignment, so I investigated possible solutions and found that a GT2 1220mm closed belt and two 50-tooth GT2 pulleys fit perfectly. They fit well under my frame braces and should work with most frame braces. You can find these parts on Thingiverse: https://www.thingiverse.com/thing:2898173. When mounting them, make sure to align your bed so it's the same height above the frame on both sides before rotating each Z axis so the X axis is parallel to the bed. To help with alignment, I created a small bed level piece that you can print and use. The 50-tooth pulleys are a bit harder to find than 40- or 60-tooth ones, but I found them on AliExpress: https://www.aliexpress.com/item/GT2-Timing-pulley-50-Teeth-8mm-Bore-for-6mm-Width-Belt-2pcs-lot/32660628656.html?spm=a2g0s.9042311.0.0.39674c4dKLGvVG. Keep in mind that you should ensure the pulleys are 8 mm bore. It's likely possible to do a similar setup for the S4 and S3 with 976mm and 28T, and 760mm and 20T, but I haven't confirmed these numbers.