New Discovery about my CT36,,,,,,,,,,,,,,,

[monte]

As my bag was filling up on my CT36 I thought to myself, hmmm, let's see how far I could push it and see how much I could fill and see how the suction works to the last "drop".
Every once and a while I would keep checking and still see yet a little more room.
And the suction wasn't decreasing.

And then as I was sanding some homasote I became aware of the lack of sound from the CT. (as well as a plume of dust spitting from my 150)
I open up the CT and behold,,,,,, finally full.
And the CT knew it too and shut itself down.

I checked the manual switch and it still went on.
Tried auto again with the sander and again it went off.

Way to go Festool!!!
[thumbs up] [thumbs up] [thumbs up]

Now, if I could only teach my CT22 & 33 to do the same!

 

[Ken Nagrod]

So Roger, were you using the CT on manual with the sander when the sander started spitting out dust and afterwards you switched over to auto to check it?  I'm not exactly sure what you're praising if the sander is spitting out dust or are you happy that that's the bag full indication?

 

[monte]

Hmm,

I was praising the fact when on "auto" mode the CT shuts off when it senses that it is full.
The sander was plugged into the CT, I only switched it to "manual" to check if it also shuts down when full in the manual mode,,,,,,,,it doesn't.

I guess I'll wait until the CT 39 comes out for that feature.   [big grin]

 

[semenza]

Oh, Wow,  I got my Wish !!

That would prevent this  http://festoolownersgroup.com/festool-wish-list/ct-bag-full-indicator!/

Now I really want to replace my CT33.

Seth

srs

 

[Wonderwino]

"...sanding some homesote..."  [scared]

I didn't know that was possible!  [big grin]

 

[monte]

"...sanding some homesote..."  [scared]

I didn't know that was possible!   [big grin]

Alex,

I'm using the Homasote (4' by 8' panels 1/2" thick) as a backdrop on my studio walls (it works well as a board to pin plans up and such)
Homesote has one side that is smoother but has a grid pattern that comes and goes on the surface.
The other side is bumpy, that side goes against the wall.
The smoother side I take my 150 sander with 50 grit rubin and gradually work the surface.
It comes out with sorta a velvet finish.

cheers.

ps. this stuff,,,,,,,, http://www.homasote.com/products/440-Soundbarrier.aspx

 

[nickao]

Is that a feature of this vac Shane or a coincidence because it sensed the motor getting hot?

I do not think I have read about such a feature. It seems that Festool would make some kind of deal about this in advertising if this was done by desgin. Possibly I just missed it in the literature?

 

[jonny round boy]

Is that a feature of this vac Shane or a coincidence because it sensed the motor getting hot?

I think this is correct, it probably shut down 'cos the motor overheated. Festool do make a version of the CT vacs that has an airflow sensor, and shuts the vac off if the airflow through the hose drops below a certain level. It's the CTM version, and they charge a LOT more for it. I can't see the US model getting this sensor for no additional cost, and with no fanfare either...

 

[Administrator_JSVN]

We're checking with Germany to make sure, but I'm not aware of a function that would shut the CT off when it's full, even on the new units. I suspect it's overheating. If I find out otherwise, I'll let everyone know.

 

[Ken Nagrod]

Is that a feature of this vac Shane or a coincidence because it sensed the motor getting hot?

I think this is correct, it probably shut down 'cos the motor overheated. Festool do make a version of the CT vacs that has an airflow sensor, and shuts the vac off if the airflow through the hose drops below a certain level. It's the CTM version, and they charge a LOT more for it. I can't see the US model getting this sensor for no additional cost, and with no fanfare either...

Jonny, isn't the 'M' designation similar to our HEPA designation for the particulate size filtered inside the CT?

 

[jonny round boy]

Is that a feature of this vac Shane or a coincidence because it sensed the motor getting hot?

I think this is correct, it probably shut down 'cos the motor overheated. Festool do make a version of the CT vacs that has an airflow sensor, and shuts the vac off if the airflow through the hose drops below a certain level. It's the CTM version, and they charge a LOT more for it. I can't see the US model getting this sensor for no additional cost, and with no fanfare either...

Jonny, isn't the 'M' designation similar to our HEPA designation for the particulate size filtered inside the CT?

No Ken. There are two versions, there's the CTL (which is sold in the US as just CT), and the CTM. Both use the same bags, and the same filters. The only difference is the airflow sensor in the CTM, which (contrary to my earlier post) does NOT shut the vac down, but sounds an alarm when the airflow drops below 20m/s.

 

[AlexThePalex]

Jonny, isn't the 'M' designation similar to our HEPA designation for the particulate size filtered inside the CT?

As far as I know the Hepa rating is probably a step up from the M class used over here. I think Hepa is closer to our H class of dust particles, in which hazardous materials reside.

 

[Ken Nagrod]

Jonny, isn't the 'M' designation similar to our HEPA designation for the particulate size filtered inside the CT?

As far as I know the Hepa rating is probably a step up from the M class used over here. I think Hepa is closer to our H class of dust particles, in which hazardous materials reside.

Interesting.  Didn't even know there was an 'H' version for you guys.

 

[jonny round boy]

Jonny, isn't the 'M' designation similar to our HEPA designation for the particulate size filtered inside the CT?

As far as I know the Hepa rating is probably a step up from the M class used over here. I think Hepa is closer to our H class of dust particles, in which hazardous materials reside.

HEPA filters, as defined by the DOE standard adopted by most American industries, remove at least 99.97% of airborne particles 0.3 micrometers (µm) in diameter.

Class L/M/H refers to the MAC value of the dust. I've just tried to find a definition of what a 'MAC value' actually is, but I failed miserably.

Suffice it to say that I think they are two different, though related, issues.

 

[jonny round boy]

Interesting.  Didn't even know there was an 'H' version for you guys.

Neither did I until a few minutes ago - turns out that the European dust classes of L, M and H simply refer to Low, Medium and High (levels of filtration). Quite obvious really, when you know!

 

[monte]

We're checking with Germany to make sure, but I'm not aware of a function that would shut the CT off when it's full, even on the new units. I suspect it's overheating. If I find out otherwise, I'll let everyone know.

Question,

If it was only an" overheating "then it shuts off feature,you need to keep in mind that when I switched it to manual it kept on sucking. Actually with good suction as well.
So shouldn't it shut down as well in manual mode? If it's an overheating thing.

Sidebar, my experiment was just to see what happens when it reaches capacity.
It's not my plan to keep pushing each bag to the last micron of dust. [eek]

 

[tbellemare]

"MAC" means Maximum Allowable Concentration.

Tom

 

[AlexThePalex]

I've just tried to find a definition of what a 'MAC value' actually is, but I failed miserably.

The MAC value was originally concocted here in Holland and means 'Maximaal Aanvaarde Concentratie' or 'Maximum Allowable Concentration' in English.

The Dutch wikipedia entry gives the following defenition:

De MAC-waarde is gedefinieerd als:

de maximale concentratie van een gas, damp of nevel of van een stof in de lucht op de werkplek, die bij inademing gedurende arbeidsperiode in het algemeen geen nadelige gevolgen heeft op de gezondheid van de werknemers en hun nageslacht.

Or in English

The MAC value is defined as:

The maximum concentration of a gas, vapor, fog or dust in the air at the jobsite, that can be inhaled during work time without any negative effects for the health of the workers and their offspring.

 

[tbellemare]

Thanks, Alex. I thought it was a Dutch thing originally. I read about it a while back when the EPA noises started.

I think it's also based on exposure time generally. Like, it's the max concentration allowable for the intended duration of exposure. Maybe you can verify that, alst U blift. My Dutch is pretty pitiful...

Tom

 

[AlexThePalex]

I think it's also based on exposure time generally. Like, it's the max concentration allowable for the intended duration of exposure.

That is correct, hence the 'during work time' part of the definition.