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| *The blade rotation system's axis of rotation should be perpendicular to the plane of the blade to ensure that the plane of the cut is perpendicular to the axis of rotary descent. If this is so, all else being rigid, the cut will descend through the workpiece along a perfectly vertical arc. | | *The blade rotation system's axis of rotation should be perpendicular to the plane of the blade to ensure that the plane of the cut is perpendicular to the axis of rotary descent. If this is so, all else being rigid, the cut will descend through the workpiece along a perfectly vertical arc. |
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| =Hydraulic Direct Drive=
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| provides high torque and low speed operation without a gearbox'''
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| [[Image: ColdSawV1HydDirDrv.png]]
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| *Comments:
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| Because direct drive is used, a shaft coupling can be directly mounted onto the shaft of the hydraulic motor. The shaft coupling is held to the hydraulic motor shaft by a set screw.
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| A precise rod is inserted into the other end of the shaft coupling; this rod allows the other components to be mounted precisely at the center of the axis of rotation. The rod is held inside the shaft coupling by a small rod (inserted perpendicular to the axis of rotation) that goes through the shaft coupling and rod; the small rod is held in place by 2 split pins (1 at each end).
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| A large diameter mounting disc (a large thin cylinder) is welded onto the rod end of the shaft coupling at a precise angle perpendicular to the axis of rotation such that the blade is precisely perpendicular to the axis of rotation as well if the blade is pressed against the mount disc.
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| Another mount disc is mounted into the rod after the blade so that the blade is supported from both ends by a mount disc.
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| Both mount discs have a pinhole pattern that matches the pinhole pattern on the blade. Small rods are inserted into the matched pinholes such that high torque can be transmitted from the hydraulic motor shaft to the shaft coupling to the welded mount disc to the blade- without slipping. The pins are held by split pins at each end.
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| A shaft collar is mounted onto the rod after the second mount disc. The shaft collar is held onto the rod by 4 setscrews. The shaft collar exerts force on the non-welded mount disc through 4 setscrews; the pressing force is transmitted from the shaft collar to the non-welded mount disc to the blade. The blade becomes precisely pressed against the welded mount disc.
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| =Feature: Fixed Blade Guard= | | =Feature: Fixed Blade Guard= |
Revision as of 22:40, 19 June 2012
Blade Rotation System Notes
- The blade rotation system must be rigid to ensure precision
- The blade rotation system's axis of rotation should be perpendicular to the plane of the blade to ensure that the plane of the cut is perpendicular to the axis of rotary descent. If this is so, all else being rigid, the cut will descend through the workpiece along a perfectly vertical arc.
Feature: Fixed Blade Guard
- Fixed Blade Guard (to protect against unintended blade contact during operation)
The blade guard must be wide enough on one side such that the blade can be disassembled without needing to remove the blade guard.
