Inspired by the Oldham mechanism, dealing with XY
compensation with a central bolted dual plate and 4 steel balls.
First glimpses were seen in Zoran 1 design, then MirageC and Evomotors machines from Hevort.
I put in place this oldham mechanism design for the Z-Upgrade of the Vcore 3 in regard to the fact that previous iterations tested tends to fails constantly to hold the bed weight, deforms, then lead to imprecision and does not bring fiability over time .
This design is reliable, without backlash and particularly effective and bring the Vcore's Z-upgrade a real decoupling solution.
-Advantages: Reliable at all levels, Compatible with "non planar printing"
-Disadvantage: thick (-46mm from Z)
This mechanism has been developped to be able to sustain the pressure of the bed weight; Previous oldham designs have shown to be unable to be durable in time. This design (3d FDM printed) contain this new durability and repetability feature with a smaller footprint The 4mm steel rods allow a good stifness, plates are made of reinforced annealedPA6CF material;
The system was designed to withstand the long term with a 6mm cast bed in 500x500, it would also hold the 8mm like my the simulation shows. However, for heavier beds, a solution will arrive in February with an Alu-Steel rod central plate.
This upgrade is compatible with ALL Z upgrade kits 😉
for the new kit with this mechanism, slightly modified arms allow to gain 3mm.
Only compatible with SFU1204 with 6 hole nut
New V3.0 for the Z Upgrade 2.0 and SFU1605 compatibility incoming...