Tangental thoughts on better control of part cooling at the Nozzel
Has anyone tried this Berd-Air MAX-24 approach to part cooling? the main + for me would be getting better view of what is happening at the nozzle as the plastic is extruded.
The system has been gaining popularity with the delta folks but it looks like it might work with the Prusa.
http://www.themakerhive.com/shop/viewitem.php?productid=75
I was admonished for posting this in another thread on this topic and I do understand that the noise levels of this DC air-pump cause this approach to be a nonstarter for many but these issues can be worked around if a proper RepRap approach is taken to the problems.
the 24 volt dc pump can be silenced this way https://www.thingiverse.com/thing:2927537
and many ways can be found to attach the very lightweight parts to the hot-end
There are quieter air pump designs that run off line voltage and their output can be controlled by valves under the dc output of a printer controller which would provide far more control and volume of part cooling air at the printer nozzle.
I think that airbrush pump designs might be worth looking at but they too are line voltage so flow control would need to be done via a bleed air valve or diverter valve from the printer controller... I think a simple servo as used in RC models might be an approach.
I do have shop air in my basement machine shop with its industrial 20 cu/ft per min at 150 psi compressor located out in the barn but I think that can be classed as overkill for this application 🤪
just trying to start a conversation on a possible solution to several problems caused by the current part cooling fan and shroud. and I apologize for asking in the other thread but the thread title did not seem to me to exclude conversation on other ways of skinning this feline.
Re: Tangental thoughts on better control of part cooling at the Nozzel
I'm interested in this as well, but have nothing to add other than I've know there's at least one person running this on their Prusa MK3. They are also running the Skelestruder designed by one of the forum members here.
Re: Tangental thoughts on better control of part cooling at the Nozzel
I think given the way my printer needs to have the blue boot or the heater block becomes a strong attractor for filament spiderwebbing leading to blobs in long unattended prints... if the circle of pipe with its holes could be moulded into the blue boot it might be even better but as it is insulated from the heater by the boot and cooled by the air passing through it perhaps it is not a problem with luck perhaps the person you mention will chime in and let us know how it works for him from that video.
it obviously gives you great control of the air flow pattern and as I mentioned restores vision of the point od plastic deposition to the operator.
Re: Tangental thoughts on better control of part cooling at the Nozzel
I am still trying to get inputs on this concept and I thought using cold air might improve a low volume solution higher velocity device like the Berd-Air
I have played with the concept (as a mental exercise only so far) of using a https://en.wikipedia.org/wiki/Vortex_tube
Vortex tube to provide very cold air to the [url] http://www.themakerhive.com/shop/viewitem.php?productid=45 ]
The Berd-Air cooling pipe ring is designed to wrap around the nozzle of your printer directing air flow onto the material immediately after being applied.
This helps prevent softening and goo build up with small perimeter parts. The Straight pipe is cut at 45 degree creating a "fan" type output and also opens up the end of the pipe for better airflow. These two pipes can be "Y"' together with the provided Y adapter and positioned to your specifications for Maximum air cooling from a single pump.
the angle of the outlet holes can be adjusted by printing another drilling jig of which there are several designs on thingverse as can their size and spacing....
I have no idea if my smalish 35 gallon 150 psi air compressor could provide the volume of air that a Vortex tube requires or if I could supply the chilled air to the silencer box in which my Berd-Air pump will reside.
I used an early version of the Berd-Air on my Delta printer as seen in the delta efector picture above but if we can control the temperature and volume and speed of the tiny jets of now chilled air we might get better control of part cooling.... we should also test if control of the flow was better done with a solenoid valve rather than adjusting how hard the little air pump is pumping via PWM control
Re: Tangental thoughts on better control of part cooling at the Nozzel
I'm interested in this as well, but have nothing to add other than I've know there's at least one person running this on their Prusa MK3. They are also running the Skelestruder designed by one of the forum members here.
I sent a reply to the owner of that youtube channel trying to get some details but no response after 3 weeks I sure wish I could get some input on this from some others that have experimented.