Printing Bed Desag

thingiverse

Printing Bed device to fight center (and other locations) sagging. my bed, PCB with aluminum surface, 220x220 mm does sag a bit in the center. leveling is very stable at the edges,but after 5 years, the bed sag noticeable, so much the first layer shows a variance in extrusion width. Placed between carriage and heating bed. Rings (small or big) have a grove for the heating bed temp sensor cables. Lift per turn: 15 um (3.7 um per quarter turn) max Lift: 3.3 mm Height min: 13.5 mm Height max: adjustable, by z-axis scaling of rings ;-) you can make it higher by simple scale up the ring to the height required. Required: - M3x25mm allen screw (easy to turn/adjust underneath heating bed) - washer (optional) - M3 nylon nut