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H-R Dust Extraction - Mk 1

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H-R Dust Extraction - Mk 1

Postby Phil » 02 Feb 2020, 10:34

H-R Dust Extraction

The scroll saw is very messy with its fine dust; the blower pipe at the top also blows all the dust directly at you. Bad design in the olden days.

The first problem, blower pipe was easy.
Disconnect from arm, wrap some wire around the pipe and then hook it onto the lamp. Dust as you cut then gets blown to the right of the table (when I cut the reindeer, with the pipe fitted on the arm, my paunch and shorts were covered in dust, sticks to the perspiration, requires a wash in a bucket next to the garden tap! :lol: )

The next problem is below the table where the bulk of the dust settles, drifts onto the shelf below and floor and anywhere else the dust-fairy decides to take it.

Dust without filter.jpg
Lots of dust without the filter
(28.87 KiB)


There is not much space under the table (old model) to retro fit the new dust extraction.
This required a bit of thought as I did not particularly want to hook up a vacuum cleaner because of the noise.

Scratched around in the electrical storage box and found 3 fans, different sizes and strengths.
Decided the large 150mm one would do.

Fan.jpg
150mm Fan to be used
(34.96 KiB)


As I did not want to waste timber building a trial model, I resorted to cardboard using a 3l wine box.
Hauled out the hotglue gun and started cutting and gluing.
Heath Robinson would have loved drawing this machine!

Apologies, no M-CAD drawings, all done as I went along.

The top of the box got a piece of vacuum cleaner pipe with the top of the front cut at an angle.

TopOfBox_pipe.jpg
Top of the box with the pipe and cables
(16.39 KiB)


The dust bag hangs at the bottom.

Dust bag.jpg
Dust bag hanging down
(17.43 KiB)


The cable connections are all open wire, so I needed to be extra careful.

Vacuumed everything nice and clean.
Switched on the extractor, very silent, and started cutting. Most of the Alphabet Puzzles.

Unit in use no dust.jpg
Running the unit while cutting
(20.66 KiB)


Results:-
The only dust below the table were some larger pieces that were cut off, the rest went into the extractor and bag.
There is still dust on top of the table, but I can live with that.

Very pleased with the concept and will now sit and do proper M-CAD drawings.
I found my small drawing board when moving boxes in the garage for the new shelves.

The trial model just hung from the shelf, somewhere in the deepest dark hours the one bracket came loose and it fell off :o . I did get up to check the noise, but being 75% asleep only found the source of the noise in the morning.

Cheers
Phil
Last edited by Phil on 08 Mar 2020, 15:04, edited 1 time in total.
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Re: H-R Dust Extraction

Postby Robert » 02 Feb 2020, 10:53

I was only looking at my old scrollsaw yesterday and thinking it needs some dust control.

Looking to cut a couple of plywood jigsaw puzzles soon. Didn't like the very fine dust floating about last time I used it.
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Re: H-R Dust Extraction

Postby Phil » 02 Feb 2020, 10:58

What make is the scroll saw?

Both mine are Hegners.

This is the large Polycut one.

I rarely use the smaller one.
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Re: H-R Dust Extraction

Postby Robert » 02 Feb 2020, 11:04

Its a pile of junk Delta that vibrates so much it would leap off the table if it wasn't bolted down.

For the amount of times I use it though it does the job.
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Re: H-R Dust Extraction

Postby Malc2098 » 02 Feb 2020, 11:51

Nice job, Phil.
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Re: H-R Dust Extraction

Postby Phil » 04 Feb 2020, 13:45

Malc2098 wrote:Nice job, Phil.




Thanks Malc.

Cheers
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Re: H-R Dust Extraction

Postby Phil » 04 Feb 2020, 13:49

Robert wrote:Its a pile of junk Delta that vibrates so much it would leap off the table if it wasn't bolted down.

For the amount of times I use it though it does the job.



Don't know the machine.

I had a 50 year old Rockwell (10th hand) before I got the Hegner. which could also be used a jigsaw.

There is an American Steve Good who only does scrollsaw. Maybe he can provide some advice?

Cheers
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Re: H-R Dust Extraction

Postby Gill » 09 Feb 2020, 23:28

Deltas used to have a very good reputation!
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Re: H-R Dust Extraction

Postby Phil » 08 Mar 2020, 15:04

Ok, the Dust Extraction "Mk 1" has been completed

Completed1.jpg
(33.06 KiB)



The dust suction under the table

DustSuction.jpg
(34.7 KiB)



I did a lot of cutting and all the fine dust ended up in the bag, only larger stuff dropped down

The dust from the top is now an issue as can be seen below
This will most certainly need to be addressed in "Mk 2"

TopDust.jpg
(39.76 KiB)


The tension adjustment knob at the back is becoming a problem for me to loosen and tighten as the grip is not good (fingers)

So back to M-CAD, quick drawing and measurement.
It must fit over the plastic knob
Out of the scrap box appears a large enough piece of Kiaat

The smell!!! 8-) 8-) 8-) Only Kiaat can smell like that
The shape was cut on the scroll saw, recess chiseled (some funny looking old tools) sanded and then epoxied over the plastic. Excellent fit.

CAD - Kiaat.jpg
(33.68 KiB)


Needs another 2 coats of Teak oil.

New-Top.jpg
(28.88 KiB)


I have similar finger problems on the blade change knob.
So I just repeated the process.
Only difference is that it is not epoxied, just a nice tight fit.
Why? Sore bruised fingers!
:oops:
I still need to ID that piece of timber. Lots of splinters.

Blade_Assist.jpg
(27.58 KiB)
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Re: H-R Dust Extraction - Mk 1

Postby Malc2098 » 08 Mar 2020, 17:07

Another proper job!
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Re: H-R Dust Extraction - Mk 1

Postby Andyp » 09 Mar 2020, 13:06

Another fit for purpose project. I’d prefer to see those connectors in a box though.
cheers

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Re: H-R Dust Extraction - Mk 1

Postby Phil » 09 Mar 2020, 17:43

Malc2098 wrote:Another proper job!



Thanks Malc
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Re: H-R Dust Extraction - Mk 1

Postby Phil » 09 Mar 2020, 17:46

Andyp wrote: I’d prefer to see those connectors in a box though.



Andy I fully agree with you.

I looked for 3 pin male to female connectors (don't surf :lol: :lol: :lol: )

The best was the chocolate block.

As long as I don't stick anything in there it should be ok.

For Mk2 I will address the problem.
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Re: H-R Dust Extraction - Mk 1

Postby Phil » 29 Nov 2020, 13:36

Andyp wrote: I’d prefer to see those connectors in a box though.



Does this look better? It was an old light switch that I mounted on a samll box and then connected up.


DustFanSwitch.jpg
(27.28 KiB)



Works well as the fan does not run all the time, only when I want to cut.
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