Part Fan Duct: how close to nozzle | directed or around the nozzle? January 28, 2016 06:14PM |
Registered: 8 years ago Posts: 1,035 |
Re: Part Fan Duct: how close to nozzle | directed or around the nozzle? January 28, 2016 09:06PM |
Registered: 8 years ago Posts: 1,873 |
Re: Part Fan Duct: how close to nozzle | directed or around the nozzle? January 29, 2016 04:25AM |
Registered: 8 years ago Posts: 1,035 |
Re: Part Fan Duct: how close to nozzle | directed or around the nozzle? January 29, 2016 06:58AM |
Registered: 8 years ago Posts: 1,873 |
Just from a practical perspective, the fan on the right is easier to work with. With one on the left being so close, it's difficult to get a position where the air doesn't hit the nozzle and the tip of the duct is still clear of the print. Other than bridging, I don't think the airflow needs to be so closely targeted at the nozzle tip either, it seems to me that a fairly general cooling of the print is what's needed, so a bit more distance helps spread the air flow around a bit, at least with these ducts which have a fairly small exit. I think a better design might have a larger exit with a little more angle away from the nozzle.Quote
So the funnel on the left you say is too close to the nozzle. Why do you say that?
Re: Part Fan Duct: how close to nozzle | directed or around the nozzle? January 29, 2016 08:04AM |
Registered: 8 years ago Posts: 1,035 |
Re: Part Fan Duct: how close to nozzle | directed or around the nozzle? January 29, 2016 08:19AM |
Registered: 8 years ago Posts: 1,873 |
Re: Part Fan Duct: how close to nozzle | directed or around the nozzle? January 29, 2016 08:56AM |
Registered: 8 years ago Posts: 1,035 |
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JamesK
Duct to nozzle distance looks fine in your drawings, and I would think the 5mm gap on the intake side will be fine as the total inlet area is much larger than the outlet. (won't there be two blowers that are restricted this way?).
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JamesK
You might want to add something to make sure that air from the middle blower doesn't bounce off the heatsinks and go back down around the print area. You want to maximise the control you have of when air hits the print, so you don't want any accidental spill.
Re: Part Fan Duct: how close to nozzle | directed or around the nozzle? January 30, 2016 04:53AM |
Registered: 8 years ago Posts: 3,525 |
Re: Part Fan Duct: how close to nozzle | directed or around the nozzle? January 30, 2016 06:18AM |
Registered: 8 years ago Posts: 1,035 |
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DjDemonD
That looks like it will cool parts very well but I wonder if the hot end heatsink cooler in this design will provide enough cooling without a fan shroud to direct the air over the heatsink fins.
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DjDemonD
But why not do a flying extruder, it must be possible to suspend a fairly simple 1.75mm direct drive over the build area above the print head it's just a case of getting enough elasticity so that the bowden tube remains attached during printing. It would be easy for a 100mm square sized build area but gets more problematic with a larger travel.
Re: Part Fan Duct: how close to nozzle | directed or around the nozzle? January 30, 2016 10:04AM |
Registered: 8 years ago Posts: 1,035 |