Bed Leveling Knob for Tronxy X5S and #6-32 Screw & Nut

thingiverse

My Tronxy X5S had a little QC issue with over-bored build plate so that the tiny M3 screws would pull through. The screws were also a little short once washers were added to prevent the pull-through, leaving the adjustment range limited. Also, wing nuts kinda suck compared to knobs. So, the easiest source of near-M3 sized screws were non-metric #6-32 x 1.5 inch machine screws. I got Bulldog Hardware #6-32x1.5" machine screw 11-pack of screws & nuts from Walmart. UPC code 035061480102. The nuts are fairly large for the screw size, so this knob might need mods for other hardware. I printed this in PLA and the tolerances were nice & tight, just about right, but you'll need to apply some force to press-fit the nuts into the knob. For springs for the longer screws, Harbor Freight has a GREAT little box of 200 springs for $4.99 (beware, same box is sold on Amazon for about $12, with metric vs english units). If you look at the second photo, You might notice there are TWO springs as the 9.12x34.9 and 5.55x38.1mm sizes, as the springs are a bit lighter than the 15mm springs Tronxy X5S ships with. Those sizes will fit concentrically over each other and the inner also keeps the outer from squirming around so much. Together they are much closer to the spring strength of the original. Remember F=kx for the bed springs, so as mass on the bed builds up, the leveling springs will slightly distort the layer height. This really only becomes an issue when the mass on the bed is several kg, but hey, some people do that!