If the mesh has low spots get some .2mm kapton tape and put on top of the magnet sheet under the flex build plate.
The bed will never be flat at all temperatures. The whole point of the bed mesh routine is to allow Klipper to compensate.
The PROBLEM with the SV08 is the bed changes shape AFTER the mesh is taken so Klipper is following the wrong map.
If you are printing functional parts that need high accuracy in the Z axis, unless you are willing to plunk down $400 for a precision ground plate cut from billet stock, print off a raft.
I had considered trying to engineer my own SV08 flat bed solution using a $44 350x350x4 mm glass sheet from Amazon that recently became available or the $65 8 mm Funssor graphite bed for the SV08.
I just watched Nadir’s video on the Funssor 8 mm aluminum build plate kit for the SV08.
He is getting slightly more than 0.1 mm of warp across the bed which is way better than the more than 1.1 mm of warping on my stock SV08, although it looks like Nadir’s bed mesh is cheating by only probing the ~240x240 mm center of the bed. I just purchased the $217 Funssor SV08 bed upgrade (including shipping). I’m tired of messing with the warped bed and this looks like a reasonably easy solution. I’ll let you guys know.
After the bed is flat, then I’ll need to address the other SV08 shortcoming, the slow and inaccurate proximity sensor that’s used to make the bed mesh. Sovol has promised to sell us a USB Eddy upgrade for the SV08 soon after the Zero and SV08 Max are shipping, and that sounds like NOW to me.
I’m looking forward to my SV08 finally living up to its awesome potential.
If Sovol lets me down on their promised Eddy probe upgrade, I might be tempted to swap to Nadir’s V5 tool head and gain LED lighting so I can see the prints, top of extruder filament run out detection so I don’t need to move the run out sensor on top of my custom enclosure and a lightweight extruder with better TPU filament path.
They use the same pictures for all their beds. The SV08 has the correct 6 bolt holes. I confirmed that with them before I ordered it. I rec’d confirmation that mine will be shipping on Sunday or Monday.
6 Bolts is a horrible design. That gives the frame the ability to twist and taco the bed as the heat from the bed slowly warms up the metal frame imbedded in the plastic base.
I feel like a bit of a schmuck. I waited and waited for a decent after market solution to the SV08 taco bed, stumbled across Nadir’s recent video and made the snap decision last Friday to get the 8 mm thick Funssor aluminum bed. I spent the $217 to have it shipped to the US and then almost immediately saw the graphite bed. Derp. I’ll console myself that the thicker aluminum bed should be able to maintain “good enough” flatness to within 0.3 mm, even if it can’t achieve the < 0.1 mm flatness demonstrated in the R3men graphite bed video, which costs $251 shipped to the US. The thicker Funssor aluminum bed will be much better than the > 1.1 mm warping on my stock SV08 bed. It supposedly shipped two days ago but UPS is still showing they haven’t received it.
The R3men site showed four screws and standoffs ship with the bed. I agree with cardoc that three points define a plane and any more is not only superfluous but even counterproductive, but I think a much better design would be a bed mounting system that positively supported the bed in Z while allowing some motion in X and Y. Screwing down the bed with 3 screws, or 4, or 6, is a recipe for thermal expansion induced warping. Maybe constrain the bed in X,Y and Z (and also the three rotational axes of freedom) at one point and allow the other points to support the bed in Z while allowing thermal expansion in X and Y.
Now I need for Sovol to sell me an Eddy upgrade for the SV08 and I’ll be very happy.
