Tonxy X1 adjustable Z axis

thingiverse

The Tronxy X1 is my first 3D printer. Like others, I quickly discovered that the Z-axis would come loose very rapidly, rendering the printer unusable. My skills in design took over, and I created a small improvement that makes the Z-axis fully adjustable - both during initial setup and to compensate for wear as it moves along the track. I folded a 20mm wide strip of 2mm thick steel into a U-shape with an outside dimension of 32.5mm and 10 & 12mm wide 'flanks'. As shown in the photos, two M3x32mm screws left over from the kit are then screwed through drilled and threaded holes, approximately lining up with the middles of the white plastic spacers. One 'flank' of the U is drilled centrally with a 4mm hole for an M4x8mm screw to go into a spare T-nut from the kit and attached this to the Y-beam. The other 'flank' of the U is drilled 2.5mm through the Z-axis steel plate in two spots. In the Z-axis plate, the holes are then opened to 3mm while the new piece is tapped M3. Two off M3x8mm spare screws hold this part rigid. I drilled two 3mm holes radially through one side of the two white plastic spacers that locate the single roller bearing on that side. At this time, I also filed the 5mm holes which locate the axle screw into a short slot, to allow adjustment. After reassembly, the two long M3 screws are adjusted to go into the new holes in the plastic spacers and push against the M5 screw that is on the axle of the roller bearing. To adjust the Z-axis play, loosen the M5 nut not on the bearing axle a little and evenly tighten the two now long screws until there is no play at all in the Z-axis. Then tighten the M5 nut to lock the setup. Nip up the M3 screws to prevent them from loosening due to vibration. I hope this description is clear enough, taking longer to explain than it did to make and fit.