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correct. the onyx rev 5 bulges upward in the center. i though that maybe the mounting screws were binding it, but after loosening them, the bulge remained. Yes, my glass is perfectly flat. i started by measuring it by itself to verify. I shimmed with kapton tape under the clips. you can see it in ...

OK, i've done another 20 hours of work and did the following addressed my non-flat build surface. The heater was bulging in the center. i went down to only using three clips and shimmed the clips with kapton tape until it was mostly flat. i used a metal ruler and feeler gauges to work this out. i ...

Yeah, this is definately not an artifact from twisted towers. the height shifts dramatically when the carriages change direction of travel. if you're not convinced, i can do another demonstration that further discounts it. It appears to be backlash of some sort, but i'm not sure where it is coming ...

ping. any ideas anyone?

Did you change the horizontal radius and recalibrate when changing to the new arms? The manual says to start at 140. I ended up at something like 144. yes. that was checked out. horizontal radius will not cause this behavior. it only influences the concavity of the plane. here the z height is ...

my machine setup rostock max v2 injection molded carriage upgrade ball cup arm upgrade belt tensioner screw jack upgrade (my own design) e3d hotend stock firmware (repetier 0.91) i'm having a very odd issue with z height shifting. let me see if i can clearly explain my observations. this issue gets ...