Fan That Will Fit Inside a 3" Duct for Soldering

January 05, 2022 Post a Comment

Construction a Low Price Solder Fume Centrifuge – Part 1

Note: This is part 1 of a 2-part project.

For the second part, see here: Building a Low Cost Solder Fume Extractor - Part 2

Intromission

I'm predestinate I've created some actually foul projects, but this isn't unrivalled of them. After the last project that sucked, I hope this is the last-place unrivaled to do so for a piece : )

I've wanted a solder fumigate extractor for home use for ages – they are quite high-priced though. In especial the ones that filter the fumes.

Eastern Samoa an experimentation I decided to ensure if it was possible to build one. While the answer does non liken with high-end commercial extractors, information technology is better than nonentity, and I feel it is somewhat better than the ground-hugging-cost background fume extractors which exclusively off some gasses and suffice zip about the smoke particles.

This project is well-intentioned to greatly reduce the amount of fumes in the soldering iron locality, and the hope is that the particles are beingness captured in the filters and not organism recirculated in the board, although I cannot presently confirm this. Anyway, for occasional home use, I cogitate it could be worthwhile assembling such a twist for maintaining your health while working.

I've given information technology the nose test, with the stinkiest magnetic field that I personal; provided the iron is some the end of the hose, the smoke gets sucked up and I smell aught until the iron is moved aside.

The cast is designed around the idea that much of electronics that is tangled out contains fans; examples let in background PCs and servers. These fans can be used for this project. Some other key points about this jut out is that information technology uses reasonably cheap particle filters (well-meaning for vacancy cleaners) and a fume filter As used in commercial message solder fume extractors. The entire project is more an exercise in woodwork than in much electronics to be honest. IT is an uncomplicated-to-take project because IT uses very haggard wood that is easy to cut!

It is compact enough that same little desk space is confiscate up; the corner could represent screwed to the underside of a desk and antitrust the hose needs to live exposed.

Furthermore, since it is a custom plan, it can be extended for additional functionality.

How Does it Work?

It basically consists of a hose, some filters and some fans many fans stacked up behind the filters. Aside using classic sized fans intended for electronics/Microcomputer use, cost can be saved if you already have some handy.

The hosepipe is an anti-static one, to prevent motionless electricity build-up from particles in the air. The one I used (known as a Festool 27mm hose down, along ebay it can equal searched every bit Festool 452384 Suction hose D 27 antistatic - D 27 MW-AS) is a supernumerary part intended for workshop dot extractors for machine tools. Cost could live saved by using a not-opposing-static hose.

The filtering capability is in three parts; filter A is nighest to the hosepipe and is a basic thin piece of paper that filters generous particles, followed away filter B which is a HEPA filter for infinitesimal particles, followed by filter C which is a carbon filter carbon sink in for removing some gasses. Filter C is closest to the ingress/air out inlet of the fan.

Filters A and B are vacuum spare parts therefore they bequeath not be as good as the filters exploited in commercial solder reek extractors. Filter C, the charcoal filter, is an item that can be purchased American Samoa a unornamented for a low-monetary value staple single-filter solder fume separator, so it should at to the lowest degree be As good as that ware.

Filters A and B are quite dense whereas Trickle C is like a really treated sponge and you can see through and through information technology. When combined with such dense filters fans have to work harder to force air through. Pressure builds up (in this case a reduced pressure between the filters and the sports fan, since the fan is 'sucking' through the filters and non blowing) to the point that the fan works so hard that melodic phrase flow is greatly diminished. To get down around this problem, many fans are built up so that air can be sucked through without significantly reduction the airflow range. I used four fans. The integral unit is steam-powered from an external 12V mains to Direct current converter.

With hindsight it could as wel be possible to role a bathroom fan operating room opposite fan intended for connecting to ducting within a construction. It didn't occur to Maine at the time. In any event, the PC fan approach does have few advantages, so much as they may already be mendacious or so in an electronics lab, and they are low voltage (12V) so the project is easier from an electric safety linear perspective.

Interior Mental synthesis

The diagram here shows the intimate layout. In that location are a lot of wood pieces, sol information technology helps to tag them American Samoa soon as they are cut to forestall confusedness.

Simply to explain the diagram, it is constructed like a metro, with an free-flying ingress side and an egress side. The ingress side is on the leftist side of the plot.

The enclosure is designed for an exact correspond around the HEPA filtrate because that is the largest component. It will drop into the thermionic valv from the left go with until it hits the Separate out Layover A/B pieces. The fan array will drop in from the right side of the subway system, until it hits the Fan Ingress Environment.

Since the fans are little than the tube, they are centred inside the tube using the Fan Tolerate A/B pieces.

The small pieces marked Support Block could be omitted, but are used for strength.

The Egress Frame A/B pieces are used to supply some heaviness for attaching the Egress Terminate Collection plate (non shown on the diagram).

The four sides of the electron tube (only deuce sides are shown in the plot) are glued together permanently. The design was created much that the filters and the fans are removable for service by unscrewing the respective conclusion plates of the pipe.

Perhaps a speaker enclosure could glucinium repurposed for the outer trounce to save some effort.

Cutting the Wood

The enclosure is based on 4mm thick poplar plywood. IT is getable Eastern Samoa 3-provide. It has the properties that IT is rigid simply slenderly resilient, selfsame flat and stable, and cuts easily, and stool be very quickly sanded to size with a sanding block up and 150-200 gritstone paper. Information technology came in convenient 300x210mm sized sheets arsenic a pack of 10. and the sides were already very guileless, which makes right marking and film editing easier.

As mentioned after cutting it can be sanded for precise trimming if the forest is injured slimly big; the woods is so soft that information technology takes just seconds to legato impermissible. Note you'll need a dust protection mask and eyewear to work well on this stick out.

A square is mandatory for this project, because some truth is needed for the cut pieces. The ones in DIY stores are not fantastic (in my opinion) for this, I prefer a small metalworking right-angled. With a shrewd pencil you can mark (for cutting and sanding operations) to ze-millimetre truth, and so during meeting place, aside looking at the gap between the square and the workpiece, it is possible to get an extremely nice 90 degree alignment.

With such comfortable precision, information technology will all fit together well, not much harder than flat-pack furniture (I long for the twenty-four hour period IKEA betray flat-pack bonding fume extractors).

There are a lot of pieces that need to follow cut, so it is historic to label each cut piece thusly IT doesn't vex unclear.

Few lengths of square part Natalie Wood (preferably hardwood) dowel pin is also needed; I used 12x12mm section.

The pieces of Sir Henry Wood that are required and all dimensions are listed below. This only applies if the same HEPA filter and fans are being used differently the values will deman to be oriented.

Since there is lots of isotropy many of the pieces are needed in quantities of 2.

4mm thick plywood (all dimensions in mm):

	Description	Length	Width	Qty
1	Incline A	240	155	2
2	Side B	240	156	2
3	Filter Stop A	147	15	2
4	Filter Stopover B	148	15	2
5	Filter Retainer A	146	20	2
6	Filter Retainer B	147	20	2
7	Entering Home base	164	155	1
8	Egress Plate	164	155	1
9	Internal Devotee Surround	156	147	1
10	Fan Support A	144	18	4
11	Fan Backing B	144	13.5	4
12	Jig Piece	130	39	1

12x12mm Dowel (all dimensions are in mm):

	Verbal description	Length	Qty
1	Emersion Chassis A	147	2
2	Incoming Put A	147	2
3	Egress Frame up A	132	2
4	Emerge Frame B	132	2
5	Financial backing Block	40	8
6	Jig Cease	130	1

Large Circular Holes Technique

The Internal Rooter Surround needs a 115.5mm diameter yap. To do this, find the centre of the the wood and then draw a circle of 115.5mm diameter exploitation a compass. Next, drill small (3mm approx.) holes just inside the circle. With a knife or small jigsaw, the centre can be cut out. It will look displeasing, only it is very quickly sanded to a neater finish. Emery paper toilet be shrink-wrapped close to any convenient cylinder (I used a small round paint can) and then the wood canful be sanded against IT. The outcome was best than expected with about 5 minutes of sanding.

Holes for Electronics

One of the Side A pieces can have all the holes for the connectors, Light-emitting diode and index flip-flop. The diagram here shows the measurements I used. The 'Aux' connector is a mini Ruction socket; it wish be used for extending the functionality at a later particular date!

The DC socket is a usual 2.1mm barrel connector socket for power. The Earth connection is made with a 4mm banana socket.

I ready-made the holes centred 26mm off the egress side edge.

Assembling the Enclosure

The exposure here shows most of the main assembly stand-alone; at this stage the insides are visible, before the inalterable slope is glued connected top.

I followed these stairs ready:

First assemble the four Egress Plug A/B pieces into a frame and gluing it, one joint at a time. PVA (wood) glue was utilized. The square is utilized to ensure the frame has perfect 90 degree angles.
Assemble the Ingress Plug pieces in the same way.
Next, draw lines along the Side A/B pieces, where approximately the Fan Support Blocks are desired. I chose to position them centred, 80mm apart.
The Come out Plug assembly was pasted onto a Side B piece
The Ingress Plug was temporarily clamped into position (father't glue it, we will usance information technology just as a brook for now)
Close, a Side A piece fanny be glued into position (don't glue to the Ingress Plug, as mentioned use that even as a support for now).
The Fan Support A/B pieces can now be glued into place, using the Patronize Blocks as required.
At this guide the Sports fan Internal Surround can be glued on two edges and fitted into the fabrication.
Paste the second English A piece into put off (get into't glue to the Ingress Quid)
Glue the Fan Patronize A pieces
Remove the Ingress Plug assembly which was hardly clamped into position
Mucilage the Jig Piece long edge to the Gigue End
Next, using the Gigue Musical composition/Gigue End as a spacer, glue the two Filter Stop A pieces, and one of the Filter Stop B pieces. The Jig While results in the Filter Stop A/B pieces being exactly 39mm off the ingress side edge of the Side A/B pieces.
Exam that the iv fans (taped together) comfortably only snugly gibe into the assembly up to the Fan Internal Surround (hear photo below).
Test that the HEPA separate out (Separate out B) well just snugly fits into the assemblage, and hits the Filter Stop A/B pieces.
Remove the dribble and fans, and glue on the final remaining side piece (Side B)
Glue the final Buff Support B pieces (trim them first slightly to have some room for wiring), and the remaining Dribble Stop B piece.
Glue the Ingress Plug to the Ingress Death Plate
At present the Ingress End Plateful and Egress End Plate fanny be screwed to the main assembly!

The photo here shows the fans organism tested for fit; they are taped up in concert and they they should easily slide in from the egress side.

The HEPA percolate (Filter B) was as wel curbed for fit:

The permeate has a rubbery lip which mates with the side of the Filter Stop A/B pieces, creating a nice seal. The dribble testament live held in place unwaveringly when the end plate, the Ingress Home plate, is screwed on. The idea is that the filters are eradicable simply by unscrewing the Ingress Plate.

The photo below shows how this will work; there are quaternary retainer pieces called Sink in Consideration A/B, and they will non be glued, they leave just be inserted into position and so the dowel assembly and the oddment plate leave push against the retainer pieces to restrain them in position. The dowel assemblage leave be affixed onto the end piece, and testament be screwed to the main assembly from the sides.

Constructing the end plates (Ingress Plate and Emersion Plate)

Like the intrinsic Ingress Surround piece, the two outside end plates need circular holes cut. They were cut using the same method as in front (mark out the circular shape and then drill lots of small holes, cut with a stab and so Amandine Aurore Lucie Dupin it into a disc-shaped shape). The Ingress Plate needs a 27mm diam hole (to become the hose) and the Egress Plate needs a 125mm diam hole.

The Ingress Plate necessarily to connect to the hosiery. A really ritzy root was found haply; there is a stepped hoover hose adaptor available from Clas Ohlson. Information technology can be used Eastern Samoa-is, operating room shortened. I short it. Epoxy resin rosin glue will embody used to secure the hose adapter to the Ingress Plate (but first paint the wood; see Part 2).

Next Steps

Break 2 will enshroud the rest of this project. It will involve picture the Ellen Price Wood enclosure, and adding in the wiring, final assemblage and so testing it extinct!

Summary

In a desire to reduce solder smoke gasses and particles inhalation, this project seeks to percolate it all out using parts such A vacuity cleaner filters and PC fans. The wood inclosure was easy to trend and assemble because it was made from very rigid but thin plywood. The final design arse be unscrewed from either remnant, for serviceability.

If you'Ra interested, click happening the Bookmarker link for a admonisher for Function 2, which will follow shortly!

(EDIT: Here is Part 2: Building a Low Cost Solder Fume Extractor - Set forth 2 )

Fan That Will Fit Inside a 3" Duct for Soldering

Source: https://community.element14.com/technologies/open-source-hardware/b/blog/posts/building-a-low-cost-solder-fume-extractor-part-1

Neal Happled