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New spoilboard preparation question

8/6/16       
B.H. Davis Member

I'm curious as to how much material people are removing when the pre-surface a new spoilboard on both sides.

Are you removing .015" per face, .03" per face etc.?

No need to get into a discussion on edge sealing, vacuum power, machine type etc. This is just a question of spoilboard surface removal amounts for different types of MDF.

Thanks,
BH Davis

8/6/16       #2: New spoilboard preparation question ...
John Meachen Member

No defined amount for me.I just skim until the surface has all been machined and no low spots are left.0.5mm below the point of first contact is a good start.

8/6/16       #3: New spoilboard preparation question ...
Gary B.

same as John here. I skim it until it's entirely flat, then flip and repeat.

8/6/16       #4: New spoilboard preparation question ...
Mark

I am generally removing .3 mm with a 4 inch diameter 3 flute solid body Vortex 8040 cutter. It is a really beautifully made tool.
The reason is that as smoothly as this cutter runs, as the tips dull even slightly it of course stops cutting as much with the tip and starts to cut more with the bottom face of the cutter. It is kind of like hydroplaning in your car, but in this case it makes friction and heat and wastes the tips even faster.
If I surface the spoil board 3 times at .1mm the bottom face of the cutter is black. If I take .3 it is a true cut, the spoil board cleans nicely every time and the tips last for months before turning them.
Incidentally my cut thru with a standard compression tool is .125 mm. a cut of .2 mm would generally clean up the board nicely if it were not for the friction issue.

8/7/16       #5: New spoilboard preparation question ...
B

I take off .04" each face of a new spoilboard. That seems like just enough to get to the nice porous stuff for our mdf.

8/7/16       #6: New spoilboard preparation question ...
Jerry Member

I start at about .005 and see where I am then adjust from there

8/8/16       #7: New spoilboard preparation question ...
Mike

Waste board thickness consistency varies for sure. I start at .010 and see what that gets me, then go .005 until flat, flip and take off another .010, usually end up taking around .040 total to get a flat waste board. I use a spoil board that never gets touched and a waste board that gets used up and pitched at about .075
thick.

8/8/16       #8: New spoilboard preparation question ...
Ken

This so more about removing the mill glaze from the MDF. That waxy glaze that needs to be removed from both side to ensure best possible air flow.
I recommend 1.0mm (0.03") from each side.
I find that any less than 1mm and you do not seem to get all the glaze off.

8/9/16       #9: New spoilboard preparation question ...
Will Williamson  Member

Website: http://www.willmade.com

.015 per side

8/29/16       #10: New spoilboard preparation question ...
Scott

I read on a forum of a guy using a 1/4 inch spoil board with out ever surfacing it. I tried it and it works awesome.

10/10/16       #11: New spoilboard preparation question ...
Mark B Member

If you dont surface the spoil board how do you know your deck is flat? Even 1/4" material could vary substantially in its thickness.


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