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f350ca
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Built this sawmill a number of years ago, was one of those design on the fly projects.
The wheel the blade runs on are triple groove C-section sheaves. Probably weigh a hundred pounds each.
The engine is a little Yanmar diesel, again no light weight.
Not realizing how heavy the head would get I used 4 inch channel on the flat for the base. Im guessing the head is about 1000 pounds, judging from how the tractor lifts it. Started sawing some beams last week and noticed the blade diving a little, something it doesn't normally do with a sharp blade.
Started looking for problems with the guides but found the base had sagged.
You can see the end bent up about an inch, with the back framework, that would case the head to tilt forward and make the blade want to dive.
The Moment of Inertia for the channel, in the plane its loaded is only 0.289 in4. Im replacing it with 5x5x3/8 angle I had. Its Moment of Inertia is 8.76 in4 making the member about 30 times stiffer.
More to follow.
Greg
The wheel the blade runs on are triple groove C-section sheaves. Probably weigh a hundred pounds each.
The engine is a little Yanmar diesel, again no light weight.
Not realizing how heavy the head would get I used 4 inch channel on the flat for the base. Im guessing the head is about 1000 pounds, judging from how the tractor lifts it. Started sawing some beams last week and noticed the blade diving a little, something it doesn't normally do with a sharp blade.
Started looking for problems with the guides but found the base had sagged.
You can see the end bent up about an inch, with the back framework, that would case the head to tilt forward and make the blade want to dive.
The Moment of Inertia for the channel, in the plane its loaded is only 0.289 in4. Im replacing it with 5x5x3/8 angle I had. Its Moment of Inertia is 8.76 in4 making the member about 30 times stiffer.
More to follow.
Greg