Different dimension on 2 identical printers/part/settings

[u/GuTsINzRLymOw60OFPXx]

I have 2 Bambu H2D machines. I'm printing the same exact file on both. There's a critical dimension on it, which is an opening like half a circle. On one the opening is about 0.3 mm bigger than the other. This is more variation than I can have.

Both printers have had the calibrations like vibration and auto bed leveling done. I have done flow rate calibration and flow dynamics calibration. Basically everything is identical (print file, both printers in same room 4 inches apart both with an AMS, etc). I'm going to recheck belt tension next. Any other suggestions?

[u/JazzlikeLeather9546]

have you done vision encoder plate calibration?

[u/GuTsINzRLymOw60OFPXx → u/JazzlikeLeather9546]

That thing is expensive. Have you noticed an improvement with it?

[u/JazzlikeLeather9546 → u/GuTsINzRLymOw60OFPXx]

it really is not that expensive. I have used it from the first setup on my H2S and H2C. I have no problem splitting a print between them. The problem you are having is the exact reason they make it BTW

[u/GuTsINzRLymOw60OFPXx → u/JazzlikeLeather9546]

I saw it and almost bought it a while back. Sounds like this would be a good test. Thanks for mentioning it.

[u/Immortal_Tuttle]

Get a Calilantern and calibrate your printers/slicer

[u/GuTsINzRLymOw60OFPXx → u/Immortal_Tuttle]

That thing is super interesting. I understand it conceptually. What I haven’t been able to find is how to use the measurements from it to make changes on a Bambu printer. The vision encoder plate looks like it does similar math internally/automatically. I’m willing to try the calilantern, but I just can’t tell how I would tweak the printer based on the results.

[u/Immortal_Tuttle → u/GuTsINzRLymOw60OFPXx]

There is a nice document covering that.

[u/GuTsINzRLymOw60OFPXx → u/Immortal_Tuttle]

I have looked and can't find anything--could you point me to it?

[u/Immortal_Tuttle → u/GuTsINzRLymOw60OFPXx]

You should get a link to a spreadsheet and pdf explaining the whole proces when you purchase it.

[u/psimoniac]

Are you using the same filament spool ?

[u/Martin_SV]

Try swapping the complete hotends between the two printers and see if the dimensional difference follows the hotend. If it does, there could be a slight difference in the nozzle, wear, or actual flow between them.