The100
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Adaptive Z-Offset Measurement
🕑 Added 2025-03-24 16:51:43 +0000 UTCHey everyone! Sorry things have been a bit quiet from my side this past week. I was still recovering from COVID, and trust me—running a loud CPAP printer right next to you with a pounding headache isn't fun.
So I was focusing on some enhancements to the THEOS firmware. Over the past few weeks, I've noticed that the BD sensor occasionally produces false-positive readings during the second homing cycle. Although these errors seemed sporadic, there was actually a consistent pattern whenever they occurred. After some digging, I suspected the issue might stem from an incompatibility between my modified second homing routine and the sensor's internal workflow.
I reached out to Markniu, and together we identified the root cause. The solution involves making some architectural changes to how homing is handled overall. It’s a bit more development effort, but the payoff will be huge—we'll be able to measure Z-distance in real-time.
In the video attached, you can see a quick-and-dirty implementation of Adaptive Z-Offset. The results were pretty impressive: out of 10 test patterns, 7 had absolutely perfect first layers. The remaining 3 had minor scratches on the underside, each smaller than a 1x1 cm patch—annoying, sure, but definitely not a dealbreaker.
This week, I'll be focusing on implementing the necessary changes for the Z-Offset feature. Additionally, there have been several bug reports on Discord and here on Patreon. I'll reproduce and address these issues, aiming to roll out a fresh update by the end of the week.
Comments
Daniel San Pedro
Jesus Christ the travel speed is insane. Can’t even see the tool head move to the next spot. Amazing!
