What Have You Been Hacking/Making [2017-06-26 edition]

[remmin...@2xlnetworks.net]

This is a message from reMMinderbot.

Makers! It's time to share... what have you been hacking on or making?

Reply to this email with a brief run-down of whatever projects have
been keeping you busy, either at the space or elsewhere.


reMMinderbot thanks you!

[vanlierm...@gmail.com]

Upgrading my China knock-off MK8 extruder with genuine E3D titan extruder. (old on the right, new on the left)

Just finished printing the newest brackets and fan duct (magnet clipped).  

Print quality could be better but then again, that's why I'm upgrading

more at http://core3d.tech

[the_digital_dentist]

I don't think that fan duct is going to work.  Axial fans can't move any air against back pressure and narrowing the duct like that produces a lot of back pressure.  Look into centrifugal blowers- they can move air against some pressure.

[vanlierm...@gmail.com]

I had a feeling that might be the case. Those fans really have no power to them. How come so many designs on thingiverse (and such) do exactly what I tried doing here? 

I did pick up a ffb03812hhn at American Science. Haven't figured out the wiring (yet) but you think it might work?

[the_digital_dentist]

I had a feeling that might be the case. Those fans really have no power to them. How come so many designs on thingiverse (and such) do exactly what I tried doing here? 

Because people don't think or test their designs before the post them on Thingiverse.  All the fan designs are based on looks because (almost?) no one who posts on Thingiverse knows anything about aerodynamics and the way air flows, and few have access to and skills to operate software that can simulate air flow.

I did pick up a ffb03812hhn at American Science. Haven't figured out the wiring (yet) but you think it might work?

It may work slightly better, but it's still an axial fan.  It will definitely be noisy because those fans tend to spin really fast.

This is the type of thing you want to use- they can blow air against some back pressure, though it's still best to avoid narrowing the duct as much as possible.

[maarten van Lier]

Thx, back to the drawing board. Really appreciate the feedback

[Jim Rawson]

While I was designing the support system for this table, I may have discovered a way to make it completely invisible!

On Mon, Jun 26, 2017 at 9:13 PM, maarten van Lier <vanl...@gmail.com> wrote:

Thx, back to the drawing board. Really appreciate the feedback

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[vanlierm...@gmail.com]

Second attempt. This one definitely blow air from the right places. 

Here is the actual implementation

The fan can move up/down to adjust for hot-end nozzle

[sshid...@tds.net]

Currently doing upgrades to my Makerfarm 3d Printer. Finally have a good profile on PETG. Next CNC router build.