Thread: Extraction System Men Shed

Brendan,

I take your point re the opening of the gates and turning on the DE. To say it won't happen would be very optimistic of me, to say the least. I'm sure it will happen at some stage, we will just have to deal with it then.

I'd be surprised it did not happen in my own shed lol.

Bobl

I take your point re the guard, It would take some work to modify to have an extraction point in the clear Perspex guard. If I could find someone to weld an extraction port in the Perspex guard this would be a better option.

We have a spare 2 HP mobile DE unit - bit of an over kill I guess. This mobile DE unit could be rigged to be switched on at the front of the STS, we would still have the problems of leaks. alternatively we could set up using a shop vac via mini cyclone system, as indicated this is additional cost outlay. The other issue we would have is limited space behind the STS.

Hmmm - looks like another modification on the books . Starting to compile a list and I haven't even connected all the tools up. If the workshop is ever finished as it seems there will always be some adjustments to improve our work environment.

Originally Posted by Brian45

Bobl

I take your point re the guard, It would take some work to modify to have an extraction point in the clear Perspex guard. If I could find someone to weld an extraction port in the Perspex guard this would be a better option.

Any thermal weld to perspex is going to reduce transparency and be brittle plus the existing guard is curved which is a bit of a pain to make a nice fit.

I would remove the existing guard alone and make a new square 4 sided one to replace it ie " back-front-top and LHS"

This might give you some clues.
My OH TS guard is described from this post forward.
Ducting update.

A 2HP DC will pull less air/dust than using your big DC.

Bobl

There was a lot of work put into making that guard. Was interesting to see the dust guard.

At this stage I do not have the available time to make anything like that, in fact I'm struggling to connect up the current tools. Hence why I'm getting a project file together for things to be modified later.

More work carried out with the Sliding Table Saw it is now connected to our extraction system. Of course this was a bit of a drama with the saw being fully checked out to ensure everything was tightened etc before it was commissioned. Did not want any blades flying off etc. Anyway it was soon identified the scribe blade was out of parallel with the main blade. This resulted in stripping the saw apart to get access to the scribe motor.

To rectify the issue we had to shim one side of the scribe blade motor out by 2.2 mm, 6 hours extra work for something that should never have been an issue if there was any quality control. The saw is now cutting square and is bloody fantastic to use.

I slipped around today and connected the extraction system, while I'm happy with the lower connection the upper is less desirable. So much so I will redo it later as it just looks ordinary.

As for dust collection it seemed to work a treat with the upper extraction point picking up from the table 2-3 mm bits easily so not sure what it will be like with fine dust particles, probably not great as Bobl has commented, will find out soon enough.
Scrib blade.jpgScribe blade Scrib blade 1.jpg Top off and shims in place STS DE 1.jpg STS Bottom.jpg Forgot to take a final shot but you get the idea.

Slowly getting there .

Looks Good Brian.

Originally Posted by Brian45

As for dust collection it seemed to work a treat with the upper extraction point picking up from the table 2-3 mm bits easily so not sure what it will be like with fine dust particles, probably not great as Bobl has commented, will find out soon enough.

Picking up 2-3 mm parts is a good start - really good is picking up say 25 x 25 x 12 mm pieces - of course that requires a bit of a seal around 2 - 3 sides of the pickup point with the other sides allowing air into the OH hood to generate the required combo of air speed (m/s) and flow (m^3/s) needed to create the lift.

While chips rely on a combo of air speed and flow, fine dust relies only flow so it is possible to pick up chips but if there is not enough flow some fine dust might escape the hood. You won't see this happening but over time you will notice fine dust settling out all over you shed. This is where good ventilation can help flush teh fine stuff out of teh shed.

If I'm reading your comment correctly. The blade guard would be best if it had a rear port and maybe a smaller port in the front so it draws air in to create more flow to pick up the finer dust. I'd be impressed if it would pick up 25 mm bits.

Dust settling in the shed hmmm not sure all the dust is from our makings. At least when we are in the shed all doors are open and fans are working, it maybe not perfect, I feel is better than what we started with . Our issue, and I'm sure many other sheds is the existing dust within in the shed from past ventures.

It will be a education to have people turn the DE on (bonus) when using the tools and to remove our sanders outside when using. Once we find a spot in the shed I can look at connecting them up. The sanders seem to be the biggest dust makers naturally.

I have been looking at the blade guard and I feel if the manufacture had a 100 mm port at the rear and a port at the front this may have been a good set up.

Originally Posted by Brian45

If I'm reading your comment correctly. The blade guard would be best if it had a rear port and maybe a smaller port in the front so it draws air in to create more flow to pick up the finer dust. I'd be impressed if it would pick up 25 mm bits.

Correct, an inlet port at the back and outlet at the font, 100mm if it's a DC and 50 if its a vac.

Dust settling in the shed hmmm not sure all the dust is from our makings. At least when we are in the shed all doors are open and fans are working, it maybe not perfect, I feel is better than what we started with . Our issue, and I'm sure many other sheds is the existing dust within in the shed from past ventures.

It will be a education to have people turn the DE on (bonus) when using the tools and to remove our sanders outside when using. Once we find a spot in the shed I can look at connecting them up. The sanders seem to be the biggest dust makers naturally.

I have been looking at the blade guard and I feel if the manufacture had a 100 mm port at the rear and a port at the front this may have been a good set up.

Yep

This is our current guard.

Blade guard.jpg An exit in the rear and opening in the front would most likely fit the bill. Be good if I could get someone to mould one up however this would be cost prohibitive $$$.

This guard seems to be made from a brittle type plastic, cutting and modifying more than likely would be an issue. To retain my sanity this modification is best left alone until I'm bored or need a challenge .

Originally Posted by Brian45

This is our current guard.

An exit in the rear and opening in the front would most likely fit the bill. Be good if I could get someone to mould one up however this would be cost prohibitive $$$.

This guard seems to be made from a brittle type plastic, cutting and modifying more than likely would be an issue. To retain my sanity this modification is best left alone until I'm bored or need a challenge .

Yeah I wouldn't modify it if it was made of brittle plastic. I'd be making one out of Polycarbonate (PC) sheet. Even the 1mm thin stuff it tougher'n'ole boots.
It bends into smooth curves really nicely - look at this.
guard3.jpg

Then cut a semicircular circular side panel and glue and/or bracket attach the panel to the curved back/top/front.
Some small Al or plastic brackets could be used to support glue joins. You could even cut the circular panel out with attached tabs that are bent over (it bends easily without heating but will need to be over bent to get a true 90º bend).
You can also pop rivet it together with small Al rivets (steel ones will crush the plastic too easily)

Here is another example of the way that stuff curves.
Wholething3.jpg