Part cooling fan - unbalanced airflow
btthrt opened this issue · 6 comments
Hi guys
Decided to move from AB-BN to Stealthburner.
The first thing I've noticed is that part cooling airflow is now not even close to uniform.
With AB-BN it was around 60-40, with stealthburner it's more 90-10 which results in uneven cooling and yada yada yada.
Tried with 2 fans: original sunnon and gdstime. No luck.
Please post more a more descriptive summary of the issue you are having. What toolhead, fan setting, photos of the issue.
Fan setting: spin-spin to push the air in
Toolhead: any
Photos: posts pictures of air
Also, both gdstime and sunnon rotors are not centered on the inlet. This known issue can potentially contribute.
How to reproduce the main issue:
- keep toolhead attached or not, does not matter
- put a glass of water close to the print head nozzle, right between the fan ducts
- turn part cooling fan on
- observe water being pushed from left to right, since there is no air pressure in the right fan duct
What toolhead are you using?
Does it really matter? They all have the same internal structure.
I've tried dragon, revo and rapido toolheads, all perform the same.
My guess - this whole problem is due to stealthburner's intake design, especially how the part cooling fan is seated. (!!!) Not the toolhead design.
If you place your hand near the inlet, you can feel that the fan is actually pushing a substantional ammount of air back.
My guess is, again, this is due to the rotor being off-centered and due to enormous gap between the rotor and the intake.
Does it really matter?
yes it does, we do actually test this stuff in development and we did not see significant uneven flow like you are describing, our CFD simulations also do not show significant differences in the flow from each duct so we need to understand WHY your setup is producing different results compared to the setups we are using during testing. and the biggest part of understanding why is figuring out where the tests are the same and where they are different.
Closing due to inactivity