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Need to Calibrate Z-Zero when Using a New PSP Resin Container


When switching to another resin container, please check the Z zero again. The silicone thickness may have some variations.

Version two PSP comes with a silicone that is softer and much stickier. If the build platform squeezes into the silicone, the four corners of the Teflon film may pop up and the linear stage will tilt slightly backward. Use your finger to feel the adhesion of the silicone. If you slightly push one of the corner, you will see the corner pops up. Avoid warping and distortion near the corners and edges of the film is the only way to prevent resin getting underneath the Teflon film. If there is no curing under the film, you can clean up the PSP and the film and then put the film back (the silicone is sticky enough to hold the film). Without the film, you may still print on silicone a few times with very mild resins.

Also please note that the build platform needs to be parallel to the PSP (completely flat) - or else the platform can press onto the corner of the PSP. Using the small build platform will decrease the chance of this happening as the smaller platform won’t press on the corners of the PSP.


The instructions mention that Z-zero calibration should be at the point where the build platform just touches the teflon surface. Can you clarify how to optimise this a little more?
At the moment i just have to visually inspect to see it isn’t pushing down, then run a few prints experimenting with .01 closer or further away.
How close is too close?
How far away is too far?
What is the tolerance?
What should we look for in a print that might indicate too close?
What should we look for in a print that might indicate too far?

Sorry to be so particular, but ive found that z-zeroing makes a massive difference on my prints and ive found optimising this calibration very difficult.


@systemnova - Please see below for two videos we have currently:

We will provide another video soon with more description. In general we lower by 0.1 mm until the 4 corners of the build platform doesn’t move. We then use a small piece of paper (around 2 cm wide by 4 cm long) to test if the paper can still fit between the build platform and the resin container. We lower the platform by 0.1 mm until the paper can barely fit in the gap.

We also overexpose the first layer of printing to account for any gaps between the platform and resin container. The way to tell if the platform is too low is by seeing if the side walls of the container bends. If the platform is not low enough, the first layer of printing would not stick with the platform.

To tell if the first layer stuck on to the platform is to make sure that the resin container lifts up after the first layer is printed.

Thanks and please let us know if you have any followup questions!

-Kudo3D Team