Hello,
I am now crosscutting some construction fir for making concrete footing forms for my workshop. All those fir boards are cupped. When I crosscut them near the edges, everything works fine, but when I crosscut in the middle of the board the saw gets stuck and it is very difficult to move. It must be wedged. I have placed blocks of wood underneath the board at both ends and near the kerf line from both sides so that the board does not bend in the middle and wedge the saw, but it did not help. The set of the saw must be ok, as it cuts well near the edges of the board. I have tried both 6tpi crosscut saw and 11tpi carcass saw but the results are the same. Both saws are sharp.
I have also made an angle jig with magnets, so that I cut perpendicular and plumb. Magnets does not slow down the saw, as once I remove the jig, saw is still stuck.
I have some more boards to cut, so I would like to ask you for an advice or technique how to support the board so that it does not wedge. My current setup is in the pictures below.
Thank you very much for your advice.
Tibor
I am now crosscutting some construction fir for making concrete footing forms for my workshop. All those fir boards are cupped. When I crosscut them near the edges, everything works fine, but when I crosscut in the middle of the board the saw gets stuck and it is very difficult to move. It must be wedged. I have placed blocks of wood underneath the board at both ends and near the kerf line from both sides so that the board does not bend in the middle and wedge the saw, but it did not help. The set of the saw must be ok, as it cuts well near the edges of the board. I have tried both 6tpi crosscut saw and 11tpi carcass saw but the results are the same. Both saws are sharp.
I have also made an angle jig with magnets, so that I cut perpendicular and plumb. Magnets does not slow down the saw, as once I remove the jig, saw is still stuck.
I have some more boards to cut, so I would like to ask you for an advice or technique how to support the board so that it does not wedge. My current setup is in the pictures below.
Thank you very much for your advice.
Tibor