SOLVED! - CMS OF Rubbish Dust Collection??

[Petey83]

So took the plunge and bought myself a CMS base along with the OF module and the y section hose with the correct adapter for it to go onto my CT Midi.

Been using it a bit today for a few test and calibration cuts and whilst i am happy with how it performs the cuts i am almost appaled at the dust collection!!

I have my midi turned up to full power and have checked the bag and whilst over half full it should still be fine, i even gave the bag outer a few blasts of compressed air to make sure the pores in the bag were not clogged.

The picture attached is what i found when i removed the fence and this is does not include all the dust i had already hovered off the table itself before removing the fence. And this was after maybe a dozen or so test passes. The ring insert was correct for the bit used and the fence spacing was up close to the  it as it should be.

I was under the impression the Midi had the same suction power as the bigger CT26 etc so short of trying a new bag which i don't think i should given its not full i am at a loss.

 

[tjbnwi]

1400 in the table?

Where do you have which hose connected? What cuts were you making?

Tom

 

[Petey83]

yep 1400 and i think a 20mm bit spinning at 17500.

36mm hose in the back of the fence and 27mm hose in the 1400 dust shroud.

cuts were 4-5 on 12mm MRMDF with fence set to jointer mode with in feed at 1mm back from out feed and then a few cuts on 30x30 pine that were either bearing guide profile cuts of straight cuts to create dados or tenons.

am at a total loss as to why so much dust and at this point seriously considering taking Festool up on the 15 days try and return policy (UK is 15 days) for the first tim ever. b

 

[Petey83]

ran a few more cut on Sunday and dust certainly lacking. Will be calling Festool UK today to see what they say

 

[Bohdan]

Check that one of the hoses is not blocked as normally I don't get anywhere near that amount of dust if both hoses are clear.

 

[Tinker]

Check that one of the hoses is not blocked as normally I don't get anywhere near that amount of dust if both hoses are clear.

That was my first thought as I was reading.  Is either hose kinked?

If I am cutting dados I get dust blowing out the end of the cut like it is jet propelled.

Sometimes, if i get more dust than I expect, I make thinner or shallower cuts.  Instead of doing a cut with one pass, I make two or three.  That usually helps.
Tinker

 

[GarryMartin]

What happens when you do the same cut without extraction? Are the levels of dust comparable? If so, then it's certainly a hose/extractor issue rather than a setup one, but if not, post a photo of your setup and we can see if there's anything obviously out.

 

[Tayler_mann]

Make sure the hose is all the way on the coupling. There is gaps where you could lose some suction. Also, I have to say I do not get nearly that amount of dust unless I had been using it for an extended amount of time and it built up in the nooks and crannys of the fence. When I so any type of jointing operation on the table I get next to perfect collection. However, I sure do not take a full mm per pass it's usually around .5 mm.

 

[Petey83]

hoses are clear as they came at the same time as the CMS and i checked before connecting up. all connections are secure and i have felt around them for leaks with nothing obvious i can find and there are no kinks in the hoses.

When dust collection is not attached the pattern of dust is different and there is a little more dust expelled but its not a night and day difference.

and to be clear the dust in my pic was a build up after no more than 10min of work and there was also dust that went on the floor and on the rest of the table that i had already cleared away before taking the picture.

I have checked the hose suction power and with just the Midi adapter attached the power is where i would expect it but once i connect the Y adapter the power at the 2 ends drops right off to the point where the under table 27mm hose feels lower powered than when the midi has teh suction turned right down.

I can go home tonight and set up again, tripple check everything and take some more pics but i am 99% sure i am set up correctly.

 

[bkharman]

hoses are clear as they came at the same time as the CMS and i checked before connecting up. all connections are secure and i have felt around them for leaks with nothing obvious i can find and there are no kinks in the hoses.

When dust collection is not attached the pattern of dust is different and there is a little more dust expelled but its not a night and day difference.

and to be clear the dust in my pic was a build up after no more than 10min of work and there was also dust that went on the floor and on the rest of the table that i had already cleared away before taking the picture.

I have checked the hose suction power and with just the Midi adapter attached the power is where i would expect it but once i connect the Y adapter the power at the 2 ends drops right off to the point where the under table 27mm hose feels lower powered than when the midi has teh suction turned right down.

I can go home tonight and set up again, tripple check everything and take some more pics but i am 99% sure i am set up correctly.

Put a new bag in your CT. See how it does then.

Cheers. Bryan.

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[Petey83]

change dthe bag despite the old one only being 2 thirds full and it does seem to have done the trick. Spoke to festool and it could just have been a case of the fine dust in the bag clogging the pores as quick as i cleared them.

Never a dust extractor voucher about when you want one as i see a CT26 in my future.

 

[bkharman]

change dthe bag despite the old one only being 2 thirds full and it does seem to have done the trick. Spoke to festool and it could just have been a case of the fine dust in the bag clogging the pores as quick as i cleared them.

Never a dust extractor voucher about when you want one as i see a CT26 in my future.

Glad it worked out mate. My big clue was the routing of MDF...  That crap gets everywhere!!

Had the same thing happen to me a few years back.

Cheers. Bryan.

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