1. A saw comprising:
a base;
a frame assembly disposed on the base;
a first rail disposed on the frame assembly;
a table slidingly disposed on the first rail, the table having an upper surface for supporting a workpiece;
a support assembly disposed on the frame; and
a saw assembly supported by the support assembly, the saw assembly comprising a motor, a cutting wheel driven by the motor, a guard portion covering an upper portion of the cutting wheel, and a fluid delivery assembly configured to direct fluid toward the cutting wheel,
wherein the fluid assembly comprises a nozzle with a hole, the nozzle having a rib that is curved about the hole to direct airflow created by the cutting wheel away from the hole.
2. The saw of claim 1 wherein the rib is curved to at least partially surround the hole.
3. The saw of claim 1 wherein the rib is integral with the nozzle.
4. The saw of claim 3 wherein the nozzle comprises a tubular member.
5. The saw of claim 4 wherein the hole faces a side of the cutting wheel.
6. The saw of claim 5 wherein the rib is positioned above the hole relative to the direction of the airflow generated by the cutting wheel.
7. The saw of claim 1 further comprising a second nozzle with a second hole, the second nozzle having a second rib that is curved about the second hole to direct airflow created by the cutting wheel away from the second hole.
8. The saw of claim 7 wherein the hole and the second hole face opposite sides of the cutting wheel.
9. The saw of claim 1 wherein the nozzle is flexible so that when a workpiece is pushed into contact with the cutting wheel, the workpiece flexes the nozzle toward the cutting wheel.
10. The saw of claim 1 wherein the nozzle is pivotable.
11. The saw of claim 10 further comprising a handle configured to pivot the nozzle between at least one of a position towards the cutting wheel and a position away from the cutting wheel.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An optical output level control apparatus, comprising:
a detector configured to detect optical power of an input optical signal;
an optical amplifier configured to amplify the input optical signal;
a memory configured to store data that define a first curved line representing a relationship between the optical input power and a drive voltage of the optical amplifier for obtaining a first output level and data that defines a second curved line representing a relationship between the optical input power and the drive voltage of the optical amplifier for obtaining a second output level;
a generator configured to correct at least one of the first and second curved lines so that a range of the optical input power of the first curved line is the same as the range of the optical input power of the second curved line and the range of the drive voltage of the first curved line is the same as the range of the drive voltage of the second curved line and generate a target curved line representing a relationship between optical input power and a drive voltage of the optical amplifier for obtaining a target output level through interpolation based on the first and second curved lines at least one of which is corrected;
a determiner configured to determine a drive voltage corresponding to the optical power detected by the detector; and
a drive circuit configured to drive the optical amplifier using the drive voltage determined by the determiner.
2. The optical output level control apparatus according to claim 1, further comprising:
a target data memory configured to store data used to define the target curved line generated by the generator,
wherein the determiner determines the drive voltage corresponding to the optical power detected by the detector by searching the target data memory using the optical power detected by the detector.
3. The optical output level control apparatus according to claim 1,
wherein the generator includes a normalizer configured to normalize the first and second curved lines, an interpolator configured to generate a third curved line from the first and second curved lines normalized by the normalizer through interpolation, and a target curved line generator configured to generate the target curved line by denormalizing the third curved line generated by the interpolator.
4. The optical output level control apparatus according to claim 3,
wherein the interpolator generates the third curved line from the first and second curved lines through interpolation in a ratio determined by the first output level, the second output level, and the target output level.
5. The optical output level control apparatus according to claim 3,
wherein the memory further stores data indicating end points of an intermediate curved line representing a relationship between optical input power and the drive voltage of the optical amplifier for obtaining an intermediate output level between the first output level and the second output level,
wherein the end points of the intermediate curved line are located on one of a straight line indicating an upper limit of the drive voltage of the optical amplifier, a straight line indicating a minimum optical power detectable by the detector, and a straight line indicating a maximum optical power detectable by the detector, and
wherein the target curved line generator generates the target curved line from the third curved line using the data that indicate the end points of the intermediate curved line and that are stored in the memory.
6. A method for generating a lookup table for use in an optical output level control apparatus, the optical output level control apparatus including a detector configured to detect optical power of an input optical signal, an optical amplifier configured to amplify the input optical signal, and a drive circuit configured to drive the optical amplifier using a drive voltage corresponding to the optical power detected by the detector, the method comprising:
correcting, using at least one processor, at least one of a first curved line representing a relationship between the optical input power and a drive voltage of the optical amplifier for obtaining a first output level and a second curved line representing a relationship between the optical input power and the drive voltage of the optical amplifier for obtaining a second output level so that a range of the optical input power of the first curved line is the same as a range of the optical input power of the second curved line and a range of the drive voltage of the first curved line is the same as a range of the drive voltage of the second curved line;
generating, using the at least one processor, a target curved line representing a relationship between optical input power and a drive voltage of the optical amplifier for obtaining a target output level through interpolation based on the first and second curved lines at least one of which is corrected; and
storing, using the at least one processor, data that define the target curved line in a storage area so that a drive voltage of the optical amplifier is searchable using the optical input power.