Re-design the print head to centre the Nozzle?

[IRobertI 520]

He's using radial fans that push the air out of the slot on one side of the fan housing. So all the air that the fan is pushing is pushed down, towards the bed.

[gudo 246]

the centrifugal fan has only one side where the blow can come out

as you can see in the picture, the blow comes straight out down in the arrow direction

[BIKBart 3]

Holy cow, I didn't expect such a response on my question/idea, this is great!

Gudo that's a really nice design, I don't have enough experience with the UM2+ yet to tell if the stock fans are 'good' enough or not. I'm curious of your findings with the radial fans. I was just thinking about a re-design where as much stock parts as possible are re-used to make it a cheap and easy improvement, but if better fans yield better print results your design could be a really nice upgrade!

[gudo 246]

Hi BIKBart

Thanks to you and to the other members for giving me the opportunity to share already  some ideas, I had not plan doing that now, I wanted wait to go further before sharing. I feel less alone

I don't have so much experiment in 3D print, just start in this field since January of this year

It's my micro-mechanical designer experiment and passion that talk to me may be there are improvements to do..I still have to learn in the electronic and software side, Gcode etc.....

since near six months my UM2 extended not + works well after some modifications, cooling fan duct, feeder( I use Bontech feeder), hot end fan cooling.... without issues, but I print mainly with the PLA material, it's easier !

Self-replicating machine would be great !