Filter Inferno by Chickenhawk Prod.

Chickenhawk Prod.

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Description

This is my Filter Inferno. It is for heating the chamber and keeping at a constant temperature as well as filtering the chamber during and after printing. I run this and the hot plate to heat the chamber prior to the start of the print. You may want to tape the doors as well. It does not eliminate all odor but it helps.

I do not recommend building this if you are not comfortable with electrical wiring, modified G-code and more.

This is a 24vdc version as that was the power supply I had laying around, feel free to use whatever you want.

This version has a 24v 100w PTC heater, dual 15x50 fans, carbon pellets, hepa filter and a tempuerature controller. I have attached a BOM that lists everything with some other options depending on what you want to do. Some parts I had others can from Ali and Amazon.

Note: I am switching to the 200w unit to heat faster.

The fans I chose have a high pressure rating to push through the filter media (carbon/hepa) and are designed to stay on as long as power as applied. The heater unit has a microswitch that will cut off the PTC heater at the end of the print with a G-code mod added. There is also a channel to add a thermal cut out for a backup as well.

2 options for the heater. With and without the thermal channel.

2 options for the fan assy. Top or side mounted

3 options for the filter. A combo unit that uses the block charcol and a short and tall that use pellets, they are just sized for the amount of media you want.

The side mounted micro switch (with glue) must be attached then sat in place and the lever bent to your bed so that when the bed is lowered it trips off power to the heater. Add the G-code and adjuct from 250 as instructed or as low as 256. then adjust the switch to trip power to the heater. The fans keep running and scrubbing tha air. The power cable runs around and out the back. And the temp probe is in the back but can be put anywhere thats out of the way.

I also installed the isolation panels done by AP Engineering (Poop cover, Top Electronic seal, Bach Electronic seal (both) and Top Vent seal)

Happy Printing

Documentation (2)

Bill of Materials (1)

BOM_ce27f77e-f1e8-44fb-bc8e-12a8b8ad8216.pdf

Other Files (1)

Gcode_93a06b78-d981-4293-a07a-3b57ac42a5fc.pdf

Comment & Rating (10)

@chriss_goe

Nice design! What temperatures do you get with this? Also can you provide detailed information of the wiring? Thanks a lot!

(Edited)

The designer has replied

@ChickenhawkProd

it holds the chamber at 60c with the temp controller.

@ChickenhawkProd

for wiring I run the fans separately to psu(24v) and are always on if PSU is on. the I run heater power through thermal safety fuse, micro switch and the to heater. so if it over heats because the fans die the fuse trips and cuts off heater, if print ends G-code lowers bed and trips micro switch to cut off heater. fans always keep running to clean the air and so on. there is a simple pic of the wiring in the PDF file on MW. hope that helps.

@chriss_goe

Replying to @ChickenhawkProd :

I tested it with a 200W PTC heater and the wiring of the temp controller gets very hot. The specs say 24V 240W but i'm not sure if it should be used with that much current.

@FlaMtnBkr

Can you elaborate on the "with and without the thermal channel?" I assume you mean a physical channel that is a cutout so you can place a thermal switch in contact with the aluminum fins? If so, do you think it's needed? I've seen chamber heaters for sale and don't think they had a switch but don't want to build or buy one that doesn't have a thermal switch if it needs to have one. I know what they are and how it works but I have never actually used one before. I would think the metal gets much hotter than the air coming thru it, and I think the switch needs to be in direct contact with the metal that heats up? Maybe I'm overthinking it, but if you want a chamber temp of 80°c then you might need a switch rated to open at 2 or 3 times that??? If it's in contact with the hot metal you don't want it cutting off before it has a chance to get the air up to temp... I guess instead of trying to understand it all I should just ask if you used one, and where you placed it and what temp it is rated for? Any info would be greatly appreciated and I apologize for rambling on as I'm not really awake yet! Thank you!!!

The designer has replied

@ChickenhawkProd

the channel is for a thermal fuse for safety to cut of heater if the fans die and there's no airflow. I use 1 that is 5c below what ever print material you make the heater from is rated for.