tool marks

[iggy37]

hey,
I wonder if anyone has any idea why i am getting tool marks on my pieces ?
They look fine until i come to sand and finish and then when sanding these lines appear , How do i stop this ?
Is it possible that my tools just aren't sharp enough ?
please help as i think i have created some nice work only too be runied by this problem.
Many thanks,
.

 

[Jonzjob]

Any photos Iggy?

 

[T. Walton]

Some pics of the items showing the tool marks would help, if we can see them we might be able to explain the reason why.

 

[Blister]

Hello and welcome

Firstly you need to decide if they are tool marks or sanding marks ?

Both have causes and remedies

As already asked we need photos :mrgreen:

 

[mike s]

i get these from time to time too
mostly on beech

 

[jumps]

please post pictures and explain process used - there is definitely more than one reason for them!

as an example I recently had a problem appear that was driving me crazy - until I realised it was from the backs of the bevels, created in sharpening and solved by replacing that wheel with a new (full size one) 'cos the diameter had fallen below reasonable for many sharpening processes.

 

[mark sanger]

Hi As has been said some pics will clarify.

If they are tool lines I would expect that the heel of the gouge is rubbing as the tool traverses through the cut. What happens if this occurs is that the wood becomes bruised/compressed on the areas where the heel rubs.

This will normally only happen on a deep bowl or tight concave surface. It can also happen if you are pushing too hard into the wood when you rub the bevel on spindle work. You only need to apply light pressure to keep the cut supported by the bevel.

If it is happening on deep bowls then you will find it helpful to remove/grind the heel away or produce a shallow bevel which has a micro bevel at the toe. This will then prevent the heel rubbing.

First off try reducing the forward pressure on the tool thus reducing the bevel rubbing pressure. Make sure the tool edge is razor sharp and if it still occurs then look at grinding back the heel. If it is happening on shallow bowls then you are pushing far too hard, which in turn crushes the fibres into the wood.

You can also see this if you apply oil or sanding sealer as the conpressed fibres will resist the amount of oil that is soaked in on the rubbed areas and will be highlighted.

Post some pics up and if you need to see a tool with the heel reduced/ground off let me know.