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New Dewalt 735x leaving scratches

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Forum topic by CrankAddict posted 09-30-2019 03:10 PM 384 views 0 times favorited 10 replies Add to Favorites Watch
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CrankAddict

61 posts in 346 days


09-30-2019 03:10 PM

Hello,

I bought a 735x about 8 months ago right after moving and it took me several months to get my garage set up to be ready to work in. Then I managed to break my hip and lose several more months. So here I am now with an 8 month old planer that is “new” and yesterday when I sent a piece of walnut through it it came out with parallel scratches on the one side (they are not raised, they are scratches that your finger nail can catch in). I have read about blades being messed up (either a chip or a burr) but when I took the top off and inspected all blades (very carefully with a bright light) I could not see any imperfections whatsoever. Is there something else I need to be checking on this thing that could be causing this? I looked at the rollers and didn’t feel anything. And I know it’s not on the bed because this piece only went through face up (on a sled) so it had to be something above it that caused it. And finally, just to ensure the rough wood wasn’t scratched and the planing was just exposing the scratches, I flipped the board over and it produced similar scratches on the other side.

Thanks!
Jeff


10 replies so far

View dbw's profile

dbw

319 posts in 2181 days


#1 posted 10-22-2019 11:47 AM

Flip the knives, i.e., use the other edge. If this doesn’t solve the problem then you have a warranty issue.

-- measure 3 times, cut once

View Woodtodust's profile

Woodtodust

70 posts in 2382 days


#2 posted 10-22-2019 12:17 PM

Looks like a couple of nicks in one of the blades or nicks on two blades. dbw has the answer to correct the issue.

-- Bill...Richmond Hill, GA--"83% of all statistics are made up."

View OSU55's profile

OSU55

2448 posts in 2534 days


#3 posted 10-22-2019 12:23 PM

Can be hard to see small nicks that can cause this. Use a piece of plastic and drag the edge down the edge of the blades to feel for nicks. May have to remove the blades. Not really a big deal – plane a few more boards and you will probably have a few more scratches.

View Gene Howe's profile

Gene Howe

11875 posts in 3973 days


#4 posted 10-22-2019 01:24 PM

You can also just shift the blades so that the nicked area is covered by the next blade. If you can find the nicked one, shift that blade.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

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theart

140 posts in 1099 days


#5 posted 10-22-2019 01:56 PM


You can also just shift the blades so that the nicked area is covered by the next blade. If you can find the nicked one, shift that blade.

- Gene Howe

Shifting the knives works if you’re getting a ridge, but not a scratch. If there aren’t burs on the knives or rollers, I would go looking to see of there are some splinters jammed up in there somewhere that are dragging.

View Kazooman's profile

Kazooman

1381 posts in 2497 days


#6 posted 10-22-2019 02:02 PM

I don’t think the shifting the blade trick will work in this instance. The OP indicated that the scratches are into the wood. When blades get nicked and leave a ridge you can shift one of the blades so that the nicks do not line up anymore and each blade clears the ridge that the others would leave. In this case, the planer is making a scratch into the wood. If it is a bad blade just shifting it will only shift the position of the scratch. The advice to flip the blades will be the acid test. If the scratches remain, there is another cause. I would look at the out feed roller and also check to be certain that there wasn’t something hanging down from the case that contacts the wood.

View WhyMe's profile

WhyMe

1184 posts in 2105 days


#7 posted 10-22-2019 02:08 PM

On the fist cut did the scratches start right at the leading edge of the board or do they show up into the board? Showing up into the board could be from wood resin or wood chips sticking to blade from the first cut. The second pass may have the scratches starting at the leading edge from crud build up from first cut.
Could be the depth bar has a couple of burrs and is dragging on the board.

View controlfreak's profile

controlfreak

294 posts in 146 days


#8 posted 10-22-2019 03:13 PM

May want to feel around the depth of cut gauge because that is the only thing other than blades and rollers that I can think of that will come in contact with the wood. I haven’t really gotten under the hood of mine but if it was coming from a roller I would expect the scratch to be in a line.

View CrankAddict's profile

CrankAddict

61 posts in 346 days


#9 posted 10-22-2019 03:52 PM

Thanks for the replies. I’ve been working with Dewalt support and they actually just sent me a whole new machine (pretty awesome support). The problem was very hard to pin down. It sure felt like a scratch on the walnut, but on subsequent testing with cedar it felt like ridges. There were no visible imperfections of any kind on any blades. Shifting the workpiece to the right and running it through again (same depth setting) would not remove the previous lines, it would just add new ones (which sort of rules out them being ridges you would think, but man that’s how they feel). The spacing on the lines (there were 4-5 total) were not the same as the blade screw heads so I think that rules them out. I felt a few rough “nibs” on the inside chassis right by the blade roller. I completely sanded these smooth up to 320 grit yet the problem remained. I could not see any debris on the rollers. I couldn’t feel any rough spots on the depth of cut gauge. I did not try flipping the blades around. Didn’t realize they were two sided actually. Dewalt seemed really keen on getting me a working solution with minimal effort on my end so even with me saying that I’d be willing to try more tests they just sent off a new planer. Bugs me a bit to not know what the problem really was, but again, very pleased with the way Dewalt handled this.

View Kazooman's profile

Kazooman

1381 posts in 2497 days


#10 posted 10-22-2019 04:07 PM

That is amazing customer service! I hope the replacement works perfectly for you. It is a great planer.

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