waves in planed wood?

[pleqtiz]

must ask the question why do I get waves on some wood when I plane it? is the blade worn out? is the material poor quality? too dry? too moist? poor feeding on the planer? when it presses down and feeds out, shouldn't it produce waves like that?

hope this is in the right forum section now!
thanks in advance

 

[snickarboden]

It's planing, but regardless, I would have tried reducing the feed speed and decreasing the removal in each pass as well.
Then waviness can still occur if the feed roller can't press down the workpiece, causing it to move slightly up and down.
You get the same problem if you're working with poorly aligned timber, i.e., not straight, as the workpiece moves constantly and the cutter leaves marks.

The blades should always be sharp and correctly set, and if they are not, that's where you start before doing anything else.

Jointing is when you run the workpiece over the tables to straighten it.
Planing is really to make two surfaces parallel to achieve the correct dimension.

What are the dimensions and what type of wood are you having problems with?

This should probably be in the tools and machinery forum to get the best and most responses.

/Kent

 

[pleqtiz]

It is planing but regardless, I would have tried to reduce the feed rate and to decrease the removal in each pass as well. Then waviness can still occur if the feed roller can't press the workpiece down so that the workpiece moves a bit up and down. The same problem occurs if you work with poorly directed wood, meaning it’s not straight, as the workpiece moves all the time and the cutter leaves marks.

The blades should always be sharp and correctly set, and if they are not, that's where you start before doing anything else.

Jointing is when you run the workpiece over the tables to straighten it. Planing is really to make two surfaces parallel to get the right dimension.

What are the dimensions and what type of wood are you having problems with?

Actually, this should probably be in the tools and machinery forum to get the best and most answers.

/Kent

Hello! I'm not sure if it's possible to reduce the feed rate... the machine runs at only 5m/min so it's probably slow but I will try to take smaller amounts at a time... I've also ordered new blades! And they weren't cheap.

I'm using spruce and pine, and now it's the 4-inch posts that weren't good; even decking planks become a bit wavy, but I will try changing the blades and taking thinner slices at a time!

 

[andersmc]

These waves usually occur when there are resonances in material or machinery. It can be an unfortunate combination of cutting thickness, speed, and feed rate. It might be that you should instead increase the feed.