Sign in to follow this  
chrisphr

Troubleshooting Dust Collection System

Recommended Posts

I've got a Jet 1200 CFM collector that I have Jimmy-rigged to PVC pipe to create my garage shop dust collection system. Worked pretty well right after I installed. Recently hasn't been working great at all. There was some build up in the pipes parallel to ground which after clearing just jammed back up again.

The poor performance of the system was really clear yesterday when I attached the dewalt planer and the air being pushed through the system blew sawdust through all the nooks and crannies around the blast gaits suggesting the the dewalt was pushing more CFM that the jet was pulling.

In the picture below are there any obvious problems? What steps should I take to troubleshoot? Should I get a CFM meter (looks like Amazon has for about $30) to figure it out? Any help is appreciated, I was going to work on some shop upgrades over the next couple months in part to improve the shop air quality.

4d978d94069e16870b437a12997ab165.jpg

Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

Sounds like the Jet isn't pulling much at all if the planer fan was able to "overpower" it.  When you disconnect the ducting is the blower pulling as expected? 

Does your lower bag blow up like a balloon or just softly inflate?  If it blows up tight you are getting too much back pressure and your filter needs cleaning / improving. 

The canisters or top bags that come stock with smaller machines are often inadequate to allow good flow after a little bit of use. One solution is, of course, a cyclone.  I have a cyclone but, also have a bag unit for the jointer.  I got an oversized top filter bag from American Fabric Filter and the little DC does a nice job.  When I see the bag start to hold a rigid shape instead of softly hanging there I know its time to clean it out a bit.

  • Like 1

Share this post


Link to post
Share on other sites

Hi Chris.

My first thought is that your DC filter is clogged. You wrote  "when I attached the dewalt planer and the air being pushed through the system blew sawdust through all the nooks and crannies around the blast gaits" , a clogged filter is what I'll go with.  I have that planer as well, and although it moves a lot of air/chips there is no reason that the DC filter should not be able to "keep up" with it.

To troubleshoot it, you might disconnect the hose that goes into the DC and then turn on the planer again, and see if air flows freely.  If it does, then the problem is in your DC - i.e. most likely the filter.  If you have an air compressor, remove the filter and take it outside and blow air into the filter to dislodge all the fine dust that is most likely built up in all the pleats.

  • Like 1

Share this post


Link to post
Share on other sites

Thank guys, two very consistent thoughts. Yes, the dust collector bag when inflated is hard a a rock. The filter is most likely culprit! Separately, I might look at what options are out there that might fit in the space to turn it into a two stage unit with cyclone.

Thanks!

Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites
Eliminate all those tight 90s and find street sweep 90s or double 45s instead. 

Good call.

Step 1 clean that filter.

Step 2, I think I am going to add the super dust deputy Jfitz suggested. To do that I think the best way will be to mount the motor to the wall which will do two things for me: 1. Create the space to fit a steel trash can to collect dust from the cyclone and 2. Eliminate two 90s and about 7' of pipe. I'll go ahead and address the other 90s at the same time.

Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

Ok, this is embarrassing. There was probably 3 cubic feet of baby powder fine saw dust jammed into that filter, how this didn't occur to me as the obvious problem I don't know.

a28cbd9f559171193842cf1e93ec542d.jpg

Once again, reminded of my own noobiness.

Do these filters require vacuuming every so often or will spinning the dust release lever once in a while be adequate to keep the filter clear?

Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

glad it looks like an easy fix!!

I really like my SDD so I hope you look into getting one installed. Note -you still need to check the filter, but hopefully it's a LOT less frequently!!

I don't have one of those dust release levers.....so I can't say.  I would think it's a good thing to use every now and then, but you should plan for periodic filter cleaning.

 

 

 

  • Like 1

Share this post


Link to post
Share on other sites
glad it looks like an easy fix!!

I really like my SDD so I hope you look into getting one installed.

 

 

 

You've sold me on the SDD, that is going to happen [emoji3]! As soon as I finish these Christmas gifts going to a bunch of shop upgrade projects, this will be one of them.

Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

Mattias Wandel Did a review of the Dewalt 735 vs his budget planer, and he also noted the blower on the Dewalt overpowered his DC also. 

  • Like 1

Share this post


Link to post
Share on other sites

I have the same problem using the Harbor Freight modified system. The secondary collection bag is filling up as fast as the primary collection unit. When using the 735, would it be best not to even turn on the dc system and just use the force of the 735?

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • Who's Online   2 Members, 0 Anonymous, 1 Guest (See full list)

  • Forum Statistics

    28408
    Total Topics
    382257
    Total Posts
  • Member Statistics

    21471
    Total Members
    1529
    Most Online
    BigDude
    Newest Member
    BigDude
    Joined