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US 5,694,821 AGranted
Method for controlling work feed rate for cutting wood, metal and other materials
AssigneeSimonds Industries, Inc.
InventorH. Reid Smith
Life of this patent
Estimating the term…
Abstract
A positioned sensing device measures and/or calculates the lateral position and movement of a saw blade. These measured and calculated values are used to automatically alter the work-feed rate and/or saw blade rim speed either up or down as sawing conditions change within the work piece or between different work pieces.
Claims12
A method for controlling a feed rate of material to be cut by a saw blade which comprises:
- establishing a zero reference point for a lateral position of the saw blade;
- detecting lateral movement of the saw blade away from the zero reference point when the saw blade is cutting material being fed into the saw blade;
- generating a signal proportional to the detected lateral movement of the saw blade;
- establishing a reference signal proportional to the proportional signal generated at a pre-selected acceptable lateral movement of the saw blade;
- comparing the generated signal to the reference signal, and if the generated signal is less than the reference signal, then increasing the feed rate, and if the generated signal is greater than the reference signal, then decreasing the feed rate.
2 more elements
A method for incrementally controlling a feed rate of material to be cut by a saw blade which comprises:
- establishing a zero reference point for a lateral position of the saw blade;
- detecting lateral movement of the saw blade away from the zero reference point when the saw blade is cutting material being fed into the saw blade;
- generating a blade motion signal proportional to the detected lateral movement of the saw blade;
- establishing a first reference signal proportional to the blade motion signal generated at a pre-selected acceptable lateral movement of the saw blade;
- generating a second reference signal proportional to the blade motion signal generated at a first level of unacceptable lateral movement of the saw blade;
- comparing the blade motion signal to the first and second reference signals, and if the blade motion signal is less than the first reference signal, then increasing the feed rate one increment, and if the blade motion signal is greater than the second reference signal, then decreasing the feed rate one increment.
3 more elements
A method for incrementally controlling a feed rate of material to be cut by a saw blade which comprises:
- establishing a zero reference point for a lateral position of the saw blade;
- detecting lateral movement of the saw blade away from the zero reference point when the saw blade is cutting material being fed into the saw blade;
- generating a blade motion signal proportional to the average detected lateral movement of the saw blade over a pre-selected period of time;
- establishing a first reference signal proportional to the blade motion signal generated at a pre-selected acceptable lateral movement of the saw blade;
- generating a second reference signal proportional to the blade motion signal generated at a first level of unacceptable lateral movement of the saw blade;
- comparing the blade motion signal to the first and second reference signals, and if the blade motion signal is less than the first reference signal, then increasing the feed rate one increment, and if the blade motion signal is greater than the second reference signal, then decreasing the feed rate one increment.
3 more elements
A method for controlling a rim speed of a saw blade which comprises:
- establishing a zero reference point for a lateral position of the saw blade;
- detecting lateral movement of the saw blade away from the zero reference point when the saw blade is cutting material being fed into the saw blade;
- generating a signal proportional to the detected lateral movement of the saw blade;
- establishing a reference signal proportional to the proportional signal generated at a pre-selected acceptable lateral movement of the saw blade;
- comparing the generated signal to the reference signal, and if the generated signal is less than the reference signal, then increasing the rim speed, and if the generated signal is greater than the reference signal, then decreasing the rim speed.
2 more elements
A method for incrementally controlling a rim speed of a saw blade which comprises:
- establishing a zero reference point for a lateral position of the saw blade;
- detecting lateral movement of the saw blade away from the zero reference point when the saw blade is cutting material being fed into the saw blade;
- generating a blade motion signal proportional to the detected lateral movement of the saw blade;
- establishing a first reference signal proportional to the blade motion signal generated at a pre-selected acceptable lateral movement of the saw blade;
- generating a second reference signal proportional to the blade motion signal generated at a first level of unacceptable lateral movement of the saw blade;
- comparing the blade motion signal to the first and second reference signals, and if the blade motion signal is less than the first reference signal, then increasing the rim speed one increment, and if the blade motion signal is greater than the second reference signal, then decreasing the rim speed one increment.
3 more elements
Method for incrementally controlling a rim speed of a saw blade which comprises:
- establishing a zero reference point for a lateral position of the saw blade;
- detecting lateral movement of the saw blade away from the zero reference point when the saw blade is cutting material being fed into the saw blade at a known feed rate;
- generating a blade motion signal proportional to the average detected lateral movement of the saw blade over a pre-selected period of time;
- establishing a first reference signal proportional to the blade motion signal generated at a pre-selected acceptable lateral movement of the saw blade;
- generating a second reference signal proportional to the blade motion signal generated at a first level of unacceptable lateral movement of the saw blade;
- comparing the blade motion signal to the first and second reference signals, and if the blade motion signal is less than the first reference signal, then increasing the rim speed one increment, and if the blade motion signal is greater than the second reference signal, then decreasing the rim speed one increment.
3 more elements
Dependencies are inferred from the claim text.