1/11/2024 0 Comments Cura cetus3dOn the MK3 Tiertime used a different one way clutch bearing. Intersting fact here is that the MK3 positions great so there have to be differences which I figured out 2 days ago. The result with my tests at this time to adjust the bearing tension ends by loosing it again as the z-level was not pisitioned precisely anymore. Especially when the axis have to move short distances which happens at every print. It is indeed possible to hold the position of the Z-axis on the MK2 version but makes the axis behave like there is a backlash. A long time ago I already tried to adjust the MK2 bearing to stop at the position when the z-axis motor is off but struggled with some issues after. What I realized that the bearing on the MK3 behaves much different and slowly let the axis fall down when the board is shut down or motor off command is sent. This bearing should prevent the axis falling down and crashing the build plate in case of emergency stop of the board or power loss of the motors. I´m not sure if the MK1 had this also so this is only one finding from yesterday on my printers. Both look the same but have slight differences construction wise which doesn´t make it possible to upgrade easily a MK2 to a MK3.īoth the MK2 and the MK3 have a one way needle bearing installed on the z-axis motor shaft. As some of you might know I have a modified Cetus MK2 and a modified MK3 here. This weekend I took some of my free time to bring my MK2 Cetus to the newest parts.
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