PWM possible for AC Aquarium pump?
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@papilio said in PWM possible for AC Aquarium pump?:
Incidentally, my "tusk" cooling system ...
wow! more text and pictures please!
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Hey @sigxcpu, my new pump's on its way ... thanks for the tip, can't wait to check it out!
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Thank you @c310! As my printer's yet to be commissioned I think I'll hold off on an in-depth discussion until the tusk setup as I've adapted it has proven itself in my experience, but please check out these posts by the concept's developer Michael Hackney
http://www.sublimelayers.com/2017/03/the-tusk-fan-shroud.html
http://www.sublimelayers.com/2017/10/tusk-part-cooling-for-titan-aero-and.htmlAnother yet-to-be-proven idea which is evident in that photo is something I'm rather excited about. I'm attempting to implement MakerGear's V4 hot end into the design. A fairly novel approach by MakerGear and welcome in my goal of eliminating all fans from the printer, this hot end is passively cooled. This is achieved by having a short, very thin-walled heat break just above the heater block. My tests upon receiving the unit, having placed a thermistor into a hole just next to the clamping collar in the custom-machined bracket, indicated that the top section of the hot end never goes above warm-to-the-touch (max temp reached was 43°C) during a two-hour run with the hot end at 260°C.
I'm not aware of the V4 having been used as a stand-alone unit previously, and quite likely never on a delta. As this hot end relies on short retractions to avoid jams it must be fed by a direct extruder, not a Bowden tube. The Zesty Nimble remote drive extruder allows this, and users find that retractions can be kept well under 1mm.
The adoption of both the tusk cooling system and this MakerGear hot end have really helped me to keep the effector assembly clean and minimalist. I've striven to keep the view to the nozzle as unobstructed as possible since I love watching what's going on. Sometimes it's fun looking back at the state of the printer's design in previous incarnations, here are a couple of images showing the massive effector head with its three hovercraft fans as I'd envisioned just one year ago!
https://photos.smugmug.com/Icarus-Delta/i-CkhbZmT/0/bcc6fe44/X3/_DSC3951-X3.jpg
And if anyone's as mesmerized by watching the Delta Dance as I always am, here's a short clip of the printer doing a first layer air-print
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Just wondering @sigxcpu ... I was looking through posts and found
https://forum.duet3d.com/topic/5238/berd-air-pump-configuration-notes-for-duet-users/19?page=1Is your PWM for the pump at the suggested ~F25500?
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@papilio said in PWM possible for AC Aquarium pump?:
Another yet-to-be-proven idea which is evident in that photo is something I'm rather excited about.
The link does not work...
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@papilio said in PWM possible for AC Aquarium pump?:
Just wondering @sigxcpu ... I was looking through posts and found
https://forum.duet3d.com/topic/5238/berd-air-pump-configuration-notes-for-duet-users/19?page=1Is your PWM for the pump at the suggested ~F25500?
The 12V one is
M106 P0 F20000 L60 B0 C"cool"The 24V one is... the same. I think this is just copy/paste, didn't bother to adjust them properly, considering that they are used on different voltages.
I have attached some pictures with the setup (the hose is a very soft silicone one from an aquarium pump). I've put a reverse diode on both motors right on their pins, just in case. The 24V one runs on a Duet 1.01 with no diodes on board, anyway.
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I'll be expecting my AliExpress 555 24V to arrive in the next week or so, can somebody direct me to the proper diode for use on a new Duet Ethernet, perhaps from the Digikey catalog? Thanks!
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UF4007 is a good choice.
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Got it, thank you @sigxcpu !
