Elliott SpeedCut SCT78, Operating And Maintenance Instructions Manual

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18 SpeedCut
Operating Instructions (cont.)
In case of excessive feed during operation, the tension of the spring is quickly overcome. The excessive
pressure on the blade raises the stem linkage that operates the blade micro switch which closes the solenoid
valve. This stops the downward travel of the saw frame. As the cutting action of the blade removes material to
relieve this excessive pressure, the micro switch will function and open the solenoid valve for an instant until
pressure again becomes excessive. This can be noticed by the operator due to the jumpy action of the saw
frame exerting excessive pressure on the blade as the solenoid valve opens and closes.
Setting Frame Limits
It is important to adjust the frame limit collars prior to operation of the SpeedCut. The frame limit collars and
limit switch create a “safe working distance” in which the saw head will continue to travel until it reaches
either collar. The benefit of this system is the ability to set an upper limit to protect structures above the
SpeedCut from interference with the rising saw head, and also to set a lower limit that will cease the saw head
motion upon completion of the cut. This gives the operator piece of mind knowing that the saw head will stop
moving once the blade has passed through the lowest section of the bundle.
To set the upper and lower frame limit collars:
1. Determine the maximum safe working height of the saw head. If there are not any restrictive
elements, ceiling, etc. above the SpeedCut it is permissible to place the collar toward the top of
the rear post.
2. Loosen the thumb screw on the upper frame limit collar and slide up the post to the maximum
desirable height. Tighten the thumb screw and the upper frame limit collar is now secured in
place.
3. Determine the minimum safe working height of the saw head. Depending on the size of the
bundle to be cut, it is typically desirable to place the lower frame limit collar approximately 1”
below the lowest tubes of the bundle to be cut. This ensures that the cut is completed and the
saw head stops slightly below the cut without bottoming out on the frame.
4. Loosen the thumb screw on the lower frame limit collar and slide down the post to the minimum
desirable height. Tighten the thumb screw and the lower frame limit collar is now secured in
place.
NOTE:
Prior to initial operation it is good practice to test the frame limit switch for functionality.
To do so, make sure that the cutting area is clear and that all proper installations have been
completed. Secure the lower frame limit collar in place a few inches below the frame limit switch.
Begin the cutting motion (without actually cutting any material) by starting the blade and initiating
the downward frame feed. When the frame limit switch meets the lower frame limit collar it
will close the contacts and you will hear a click. At this time the saw head will stop feeding
downward.
NOTE:
It is important to use the frame limit switch system to ensure all the solenoids are
closed and that there are no open hydraulic circuits. It is not desirable to operate this machine
by creating “hard stops”, bottoming out the saw on the lower frame upon the completion of a
bundle cut.
Establishing Correct Feed
Decrease frame feed by turning cutting speed control dial until cutting speed and feed are equalized.
Insufficient feed is easily recognized as the blade will do very little cutting, if any, due to the lack of cutting
pressure.