Problem with Dewalt Planer - Router Forums
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post #1 of 35 (permalink) Old 11-02-2019, 11:15 AM Thread Starter
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Default Problem with Dewalt Planer

I have a DeWalt DW735 thickness planer with a Byrd spiral cutter head. This cutter head has been on since I bought the planer 10 years or so ago. It started filling up with dust about 2-years ago. I took it to a local authorize repair shop. I was told they didn't know why it was happening and they would not work on it again since I modified the unit by replacing the cutter head. The planer is attached to a Laguna 1,500 CFM dust collector. I removed the dust collect filter every couple months and use a leaf blower to clean it.

Does anyone have a recommendation for solving this? I have to clean the planer out every couple weeks.

Also, I have a Bosch 4212L miter saw. I can not locate a dust port adaptor so I can attach a shop vacuum. It is 1 3/4" inside and 2" outside. I have tried many adaptors, but none fit. I contact Bosch, but they were no help.

Malcolm / Kentucky USA
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post #2 of 35 (permalink) Old 11-02-2019, 11:53 AM
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My first thought, Malcolm, is that the internal blower isn't working. If you take the hose off and run the planer does it throw chips into the next Zip code? If not then I would look at the blower.

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post #3 of 35 (permalink) Old 11-02-2019, 12:06 PM
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This is completely off the wall, David, but are you absolutely positive the DC is pulling unobstructed air through that particular collection pipe?
I ask because on at least two occasions I've had the same issue and both times it was the DC system; once I had opened the wrong port and the other time a piece of debris was blocking air movement right at the fan.
With the planer running, and hearing protection on, i couldn't even hear the DC running.
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post #4 of 35 (permalink) Old 11-02-2019, 01:54 PM
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I did the same as Dan did and once even started planing, and forgot to turn on the dust collector, the outlet plugged up fast. I think David is on the right track, check out the internal fan on the planer, or an obstruction in the DC line.Let us know what you find, It will be a help for all of us. The Helical cutters put out a different shaped chip than the straight cutters, might require a revised dust collection. I was going to see if I could remove the internal fan on mine and just go with the DC system, but sold it before I got around to it.
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post #5 of 35 (permalink) Old 11-02-2019, 05:15 PM
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Heh...I forgot that. I've also done the not-turning-on-the-DC trick (at least) once. *embarrassment*
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post #6 of 35 (permalink) Old 11-02-2019, 05:17 PM
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Does the fan motor have brushes? Are they worn? That thing should be spitting out chips like mad all on its own. And it's 10 years old, which is pretty good for a fan motor. The repair station ought to be able to do that for you, but brushes are generally pretty easy to replace.
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post #7 of 35 (permalink) Old 11-02-2019, 06:15 PM
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Tom; that's only true if there is no impediment to the airflow down the DC piping. The back pressure will kill the fwd movement of the air from the DeWalt's fan pretty quickly. Like trying to blow up an already inflated balloon.
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post #8 of 35 (permalink) Old 11-02-2019, 08:29 PM
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This same problem came up about a year ago on another woodworking forum. It seems that there is a conflict between the internal fan and the dust collector. I'll cut and paste what one of the guys had to say.

From Rennie Heuer on Family Woodworking

I have a Dewalt planer (DW735) with which I am rather pleased. It is a work horse that has never failed me in over 10 years of use. The only issue I have with it is that debris keeps building up inside the case fouling the gears that raise and lower the cutters. It was bad with the original knives, it seems much worse with the Shelix head I just installed. It requires really removing the cover, vacuuming out the bulk of it and then alternating between a dental pick, vacuum, and small advances of the mechanism to get it all dislodged and cleaned out.


I did some research on line and found many people have the same problem but few had any luck in correcting it - except one fellow. His solution was to remove the fan on the motor shaft. He reports that the problem has completely disappeared and the machine runs quieter. I believe his theory is that the fan blows the chips out at a very high velocity, a higher velocity than the dust collector moves the air out thus compressing the chip flow and causing it to back up into the machine.

I'm no engineer, but I do think I possess a modicum of common sense and this made sense to me. So, after the clean up (the third one in a month!) I removed the fan shroud and took out the fan. The machine is indeed quieter. I will be running some white oak and poplar through the planer in a day or so. I'll give you all an update then.

Rennie removed the impeller and ran a bunch of oak and walnut through with no build up and the motor was just warm as the fan is just to remove chips not cool the motor. His was an older model DW 735
Here is a link to the whole thread if that is allowed.Pictures are not available unless you are a member.

https://familywoodworking.org/forums...er+plugging+up
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post #9 of 35 (permalink) Old 11-02-2019, 08:44 PM
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@mimac Excellent, Brian, just as I have always thought. A conflict between the planer motor fan and the DC. Also the noise of the 735 that I always despised.
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post #10 of 35 (permalink) Old 11-02-2019, 08:56 PM
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So, we all agree? We should do this again sometime!
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