Having trouble with your Festool power tool? Well, we're here to help you. Before posting to the forum, give us a chance to diagnose and resolve your issue. In the U.S. and Canada, call us toll-free at 888-337-8600 on Monday-Friday between 8a-5p EST or contact us via email at service@festoolusa.com. For other countries, please visit http://www.festool.com for contact information for your local Festool service department.

Author Topic: Dust Collector cycles on/off randomly while sanding  (Read 2186 times)

0 Members and 1 Guest are viewing this topic.

Offline Flackmistress

  • Posts: 10
Dust Collector cycles on/off randomly while sanding
« on: August 21, 2017, 11:39 AM »
I have been using the DC only a few months.  Today, while finish-sanding cabinet sides, the DC cycles on and off while sanding.  It started doing this when I went to 400 abrasive, but it also does it now with 220.  I have tried reducing the suction, but still cycling on/off.  I am a new Festool user, so it is quite possible this is normal.  Or, do I have a problem?  I appreciate any guidance from a more experienced user.  Thank you.

Festool USA does not pre-approve the contents of this website nor endorse the application or use of any Festool product in any way other than in the manner described in the Festool Instruction Manual. To reduce the risk of serious injury and/or damage to your Festool product, always read, understand and follow all warnings and instructions in your Festool product's Instruction Manual. Although Festool strives for accuracy in the website material, the website may contain inaccuracies. Festool makes no representations about the accuracy, reliability, completeness or timeliness of the material on this website or about the results to be obtained from using the website. Festool and its affiliates cannot be responsible for improper postings or your reliance on the website's material. Your use of any material contained on this website is entirely at your own risk. The content contained on this site is provided for informational purposes only and does not constitute professional advice.


Offline Gregor

  • Posts: 547
Re: Dust Collector cycles on/off randomly while sanding
« Reply #1 on: August 21, 2017, 12:09 PM »
Specifying the type of dust extractor might give better responses.

In general for a festool vac with the sander connected to the 'auto' socket: it shouldn't turn off inbetween. A CTL-SYS might go into thermal shutdown though when choked by blocked airflow, but then it should take a relevant while for it to cool till it'll come on again.

Offline GarryMartin

  • Posts: 1629
Re: Dust Collector cycles on/off randomly while sanding
« Reply #2 on: August 21, 2017, 12:10 PM »
What DC and sander are you using?

Offline Flackmistress

  • Posts: 10
Re: Dust Collector cycles on/off randomly while sanding
« Reply #3 on: August 21, 2017, 12:52 PM »
CT 36 E Dust Collector, and ETS EC 125 sander.  I should have included that in my original post.

Offline GarryMartin

  • Posts: 1629
Re: Dust Collector cycles on/off randomly while sanding
« Reply #4 on: August 21, 2017, 01:06 PM »
And is the dust extractor cycling on/off or is the power to the sander cycling on/off?

Offline Alex

  • Posts: 5477
Re: Dust Collector cycles on/off randomly while sanding
« Reply #5 on: August 21, 2017, 04:48 PM »
but still cycling on/off.  I am a new Festool user, so it is quite possible this is normal.  Or, do I have a problem?

It is not normal. Doesn't matter which vac or sander you have, they should work continuously without problems.

It could be something very simply like a loose contact or a break in the cord of the vac or the sander.

I would check if all connections are secure, look especially at the plug it cord of the sander, if it's seated properly. Check the socket of the vac, and wiggle the plug of the sander to see if there's a problem. Wiggle both the cords of the sander and vac to see if that might be the problem.

Does your vac behave like this with other tools too, or only with this sander? How does the sander behave when connected directly to a wall socket without the vac in between?

Offline GarryMartin

  • Posts: 1629
Re: Dust Collector cycles on/off randomly while sanding
« Reply #6 on: August 21, 2017, 05:17 PM »
It is not normal. Doesn't matter which vac or sander you have, they should work continuously without problems.

I was trying to ascertain whether the extractor was cycling or the sander Alex. If the sander, as it's the ETS EC, it could be a flow problem. Of course if it is the extractor, then there's something wrong.

Offline tjbnwi

  • Posts: 5265
  • Cedar Tucky Indiana
Re: Dust Collector cycles on/off randomly while sanding
« Reply #7 on: August 21, 2017, 05:24 PM »
I've had this happen if the plug connection at the tool socket on the CT has come loose. I push the plug in all the way and the issue goes away. Find it happens when I drag the CT around by the hose and cord.

Tom

Offline Alex

  • Posts: 5477
Re: Dust Collector cycles on/off randomly while sanding
« Reply #8 on: August 21, 2017, 05:46 PM »
I was trying to ascertain whether the extractor was cycling or the sander Alex.

Yes, I get that, Garry. Though Flackmistress says in the first post right there it's the DC that's cycling.

But whether it's the vac or the sander, when power goes on and off, there's a problem there, and then you've got to start troubleshooting which part of the chain is the faulty one. So I gave some directions in my post where to start. My suggestions were logically aimed at Flackmistress, and not at anybody else.
« Last Edit: August 21, 2017, 05:53 PM by Alex »

Offline antss

  • Posts: 1374
Re: Dust Collector cycles on/off randomly while sanding
« Reply #9 on: August 21, 2017, 06:57 PM »
On the EC sanders - it could be the vac hose connection sensor or circuit playing games .

Offline Flackmistress

  • Posts: 10
Re: Dust Collector cycles on/off randomly while sanding
« Reply #10 on: August 21, 2017, 10:46 PM »
Thank you everyone for your suggestions.  I will investigate all of this again in the daylight tomorrow.  It is a fairly new DC, so I expect something simple.  Very low miles at this point.

Offline Flackmistress

  • Posts: 10
Re: Dust Collector cycles on/off randomly while sanding
« Reply #11 on: August 25, 2017, 08:20 PM »
I have resolved the problem.  The 2 dimensional bag is not optimally designed to fit inside the 3 dimensional canister.  Hence, it folds over within the canister.  My bag was approx 40% full at best, but the fold caused a bowel obstruction, restricting air flow.  Hence, the machine thought it was full, and the cycling on/off was my signal.  I fluffed out the bag to finish my project, and today I emptied the bag.  Yes, emptied, not replaced.  I carefully cut off the end of the bag, emptied it into a trash bag for pick up, and folded over the ends and re-hemmed the bag on my sewing machine.  Second time I have done this, and I plan to continue doing so until the bag wears out.  Not willing to buy the overpriced bags.  Principle.  Another option is to fold over the end of the bag twice and fasten it with medium sized binder clips.  I do this with my Oreck vacuum that has a very small bag, and it works great.  Just sayin.

Offline Dovetail65

  • Posts: 4594
    • Rose Farm Floor Medallions and Inlays
Re: Dust Collector cycles on/off randomly while sanding
« Reply #12 on: August 26, 2017, 01:40 AM »
I find that strange that's the cause. Possibly I dont understand the issue fully.

I fill my bags up  so full that they are as hard as a rock and sometimes I cant even get them out of the CT. I dont see how your problem creates  more restriction  to airflow than what I experience with bags so full with super fine dust that I literally have had to cut them out of the CT.
« Last Edit: August 26, 2017, 01:42 AM by Dovetail65 »
The one who says it can't be done should avoid interrupting the person doing it.

Offline Alex

  • Posts: 5477
Re: Dust Collector cycles on/off randomly while sanding
« Reply #13 on: August 26, 2017, 03:57 AM »
Yes, odd, a full bag never restricted airflow in any of my vacs to the point it would shut off.

Offline Flackmistress

  • Posts: 10
Re: Dust Collector cycles on/off randomly while sanding
« Reply #14 on: August 26, 2017, 10:26 AM »
It is very simple:  the bag got folded just right that the dust collected ahead of the fold, but behind the inlet, so the air flow was restricted.  Anyhoo, the obstruction was released.  You obviously have done a better job of tucking in your bags in the first place, so I will be more mindful of this going forward.  I am very happy with the unit.  Learning curve...stay with me as I grow my skills!  Thank you again for all your replies.