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How should I setup my router table for proper dust collection for this? The dust and debris was flowing/flying out to the left, channeled out by the very slot I was cutting.

Easiest way to solve is to get routers with proper built-in dust collection ports so that you can suck off dust from under the table as well as at the fence.
1. Dewalt
2. Triton

I use a GMC R2050 which is an identical clone of the Dewalt DW621 and I have almost zero dust under the workpiece nor any dust dropped into router fan.

 

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Thank you guys, all good advice
Yes my router came with a dust collector adapter but I thought that would be to be used with the plunge base. Of course I could try to install it under the table.
I also came across a youtube video showing how to build a dust collector box under that aluminium table top.... it does not look very complicated. The design require magnetic mounts and 1/2" plywood. I might aim for that as well. The co clusion is that for narrow boards it can be done either way, on top routing or using the table but in the se one case the dust collection must be done via the router insert opening from underneath. Will try that dust collector adapter that I already have. I will definitely try multiple passes.

It seems that I also need to read about router speeds and wood types .The first attempt burnt some wood/dust ..lowered the speed and I could see wood dust and debriseith natural wood color comming out of the channels and not brownish smelly stuff as before

Let me tell you the truth and maybe annoy some ignorant fanboys of a certain brand.
Plastic "Dust collector adapters" are afterthought devices and are NOT as good as Dewalt or Triton designs.
I had the Hitachi M12V with a AUD90 dust adapter purchased aftersales and installed under the table. One, it blocked some plunge movement. It has to be taken off if I wanted to use template Guides (AKA Guide Bush) or Guide Bush adapter since the screw holes were already occupied. It was not very effective.at removing dust when under the table. OK only when used portable.
So I bought the GMC R2050 2000W clone of Dewalt DW621. With two hosts connected to a Mini-cyclone sucked by a ShopVAC with HEPA filter, my table routing became extremely clean.
It grieved me that I had to take out my M12V from the table just because of Dust collection "defects". So I altered the base of GMC R2050 2000W to be able to accept the sets of guide bushes I already bought for the Hitachi M12V..

Never enclose the router in a box to remove dust. Routers need fresh air sucked in by its own fan to cool the motor or it will burn up,

The Hitach M12V is very accurate router and I still use it to cut Kitchen bench top and sink holes etc and to make jigs and plane slabs.

 

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FYI
Why are AFTERTHOUGHT add-on plastic dust chutes very NOT good for under the table?
To allow the big collet nut to pass through, those chutes have BIG center holes. Upside down dust can get into the motor fan holes.

Dewalt, Triton Engineered dust chute ports suck through the router base . BIG DIFFERENCE!

I am not a fanboy of any brand.


If i want a new SCMS, I will only choose the new Makita SCMS series that has the best dust collection design today.

 

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You don’t need to use The routers DC when you add DC to the router table, unless you aren’t using a alternate DC…

If you enclose the router in a box, the DC will suck away all the air and the router motor will overheat because the router fan cannot get any cool air into the router motor.

Maybe a water-cooled spindle will work in a BOX.

 

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Agreed with Tom.
I have a similar system.

But I also added a Drywall filter + a HEPA Filter to my ShopVAC. The regular filter bag of 5 micron isn't good enough for filtering off fine-dust.

ShopVac has a branch in Hallam, VIC, Australia about 20km from my house
Shop Vac Australia Pty Ltd
That was where I can walk in to buy all the special Filter bags and HEPA filters, hoses, fittings etc. from at FAIR PRICES. Hardware stores usually only sell the ShopVac and 5 micron bags only.

 

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(language removed by moderator)
Where is that air in the dust box coming from and where does it flow?? It's coming from the room as make-up air, which is ambient temperature. And it flow or is sucked thru the opening in the table thru the router body and cooling it!
I'd be happy to run the thermo profiles on any router you want to stick in a box with constant air flow and chart the results. I'm a thermodynamics engineer. It's moving air, all it does is cool, because of the velocity carries the heat away.

Please don't speak if you don't have your facts straight.

Tell me, why is the lowest speed of an air cooled router limited to 8,000rpm or 10,000rpm? Because at slower RPM the FAN propeller cannot cool the motor enough and the motor will overheat.
The external DC sucks air from some cavities to the DC hose directly creating low pressure in the box. So the propeller of the fan in the router is drawing much less air into the router body itself to cool the motor inside.

I can run my VFD at 1,000rpm because it is water-cooled and won't overheat.

(I had been a Factory Manager of a fully automated factory running 24hours 6 days a week for 15 years - I don't and won't do things by trial and error. Until I quit, zero accidents for over 3,000 employees was my record).

 

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And you never will....

Watch her TRIAL & ERROR on Dust collection enclosing the router in a box

She wasn't using a Dewalt DW621 with proper dust chute - that was the root cause.