New S3 auto-leveling issues when printer is warm

[xiaosong 0]

Hi,

 

I have a new S3 that is about a month old that is experiencing active leveling issues. If I start a print from my S3 that has been off or idle for a few hours, it passes active leveling and prints without any issue. However, if I then try to start a new print soon after the first print finishes, I will run into active leveling issues and receive the "Difference between detected height of both print cores exceeds realistic values" or "nozzle offset probe failed. Please check the nozzles and bed and try again." Here are two videos that demonstrate the behavior: https://photos.app.goo.gl/jkbp3zm88neK8cei6

 

Basically, the build plate starts moving up to the printhead and stops before even reaching the print head. 

 

However, if I wait an hour or more after the last print has completed and the printer has cooled down and then start the print, it will pass active leveling without issue and proceed to print without issue.

 

Have anyone experienced this before or know of the cause or potential fix? 

 

Thanks

 

 

 

Edited February 27, 2021 by xiaosong

[Carla_Birch 116]

I have never had the problem where it seems down to the temp of the printer, normally its due to other devices in the area of the printer making interference for the sensor.

 

Check the wires inside the print head from the sensor board are all fine and that it's plugged into the back of the print head fine (unplug it and plug it back in again). The sensor is the whiteboard you see when you drop down the print head front fan to access the print cores and you will see 2 metal pins in the center of it, check they are all fine and not lose.

 

If the problem remains and all the wires seem fine, then it's likely best to contact your local reseller who should be able to help. 

[xiaosong 0]

Thanks Carla. If I unplug the front fan when the printer is warm, it does seem to pass active leveling ok. I'm just confused as to why it only seems to be an issue when the printer is warm from a recent print and not all the time. 

[Haeder 2]

Hello xiaosong,

I have the identical issue  with my S5, when I do trials and stop prints and restart short after, then this kind of issues comes up.

If I start then a second time it will be work in 95 % of cases

 

Do you still have the issue ?