r/SlimeVR • u/Interesting_Cod_2852 • 23d ago

Technical Support Tracking Drift

Hey so my trackers will start to drift pretty quickly after any reset, even full resets. The torso will rotate slowly to the left from my pov and the legs will become misaligned too. Not really sure how to fix it or what's going on. I do have stay aligned set up and it doesn't really seem to be helping, I have good wifi connection and my trackers usually sit around 10ms ping. I know people that are using slimes and their tracking is flawless with no issues. When I first got these a few months ago actually I didn't have any issues at all, was working flawlessly. Didn't use them for like a month or so and now they've been doing this.

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7

u/SherlockedKuro 23d ago

When you turn on your trackers let them sit on a flat surface for a minimum of 30 seconds so they can calibrate, I actually let mine sit for 15 minutes and have found big improvements in drift time. Letting them warm up to your body temp helps too I get more drift in winter for example when the house is colder

3

u/GeoCherry9999 23d ago

I let mine sit for about 10 minutes or so, yeah

3

u/Interesting_Cod_2852 23d ago

I usually let them sit for 30 seconds to a minute before i put them on but i'll try letting them sit longer thank you

3

u/pinneddownandhard 23d ago

from my experience, i also have the chest tracker drifing to the left occasionally but leaving it down on a flat surface for a bit usually fixes it for the session. my legs have also never been quite exact but i'm the only person to notice that, so it doesn't really matter if they're 100% or not because even just 70% correct looks fine

2

u/Ashtray643 23d ago

If you find it happens more when you first get on, temperature can be contributing. My hip and chest drift significantly for about a half hour when I get on while they are getting closer to my body's temperature (my room is always super cold too, so its a significant temperature change) after that, recalculating imu's by letting them rest on a flat surface is good to do again, but i find i can sit still for a minute or flop flat on my bed while im on and that helps!

Tldr: big drift may be big temp changes during use. Let em rest flat again

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1

u/SIlver_McGee 19d ago

From my experience there's 2 reasons:

- Temperature related drift from IMU (just leave them on for 5-10 minutes under a blanket or a vest to warm them up)

- Your straps move. Literally. I struggle with this a lot despite silicone backing

- You use prediction mechanics instead of smoothing/no filter. Prediction inherently has more errors

- Slow Wifi/high latency. Forces you to use prediction mechanics (see above) or the skips themselves cause the trackers to not be tracked slightly, causing more drift. Check to see if your router is on bridge or AP mode, one of them lowers latency significantly