LINK Systems OmniLink II Press Automation Control - Manual (Page 74)

August 30, 2002 Manual Version 1.0 4.25
5. The stopping time and distance (angle) for the press may be different depending on the angular
region over which the press stops. Thus, the settings for Low Speed and High Speed Degrees Before
Top Dead Center made in step 3 may not stop the press as close to the top as desired. To refine the
adjustment, turn the Run/Program key to Program so that you can change the settings made in step 3.
If the press has stopped X degrees beyond Top Dead Center, add X degrees to the settings made in
step 3. If the press has stopped X degrees before Top Dead Center, subtract X degrees from the
settings made in step 3 for both Low Speed and High Speed Degrees before Top Dead Center.
6. Repeat step 4, if necessary, until the press is stopping within a few degrees of top each time you
push the Top Stop softkey at the Low Speed SPM. It is normal for a small variation to occur in the
stop angle of the press as the press is stopped multiple times.
7. Now that the stop at Low Speed SPM has been calibrated, set the press stroking speed to the highest
stroking speed, stroke the press in Continuous a few strokes and press the Top Stop softkey to stop
the press. Compare the measured speed displayed as Speed At Stop Initiation on the Operator
Terminal with the value you entered into the High Speed SPM. If different, change the setting for
High Speed SPM to the measured value. Since the press was stroking at a higher speed, it will have
gone well past Top Dead center before stopping. Also, verify that the calculated stop initiation angle
displayed as Calculated Degrees Before Top Dead Center is the same as the value programmed for
both Low Speed and High Speed Degrees Before Top Dead Center.
8. For high speed presses, the press may take more than one stroke or even multiple strokes to stop at
the high speed, so the angle at which the press stops could be anywhere in the stroke. Regardless of
whether the press stops in less than a stroke or more than one stroke, calculate an approximate angle
setting to replace the current High Speed Degrees Before Top Dead Center by adding the angle
displayed on the Operator Terminal angle display (which shows where the press actually stopped) to
the angle displayed for Calculated Degrees Before Top Dead Center. Turn the Run/Program switch
to Program and replace the existing High Speed Degrees Before Top Dead Center setting with the
approximate angle setting calculated by the method in the previous sentence.
9. Return the Run/Program switch back to Run and initiate Continuous stroking again. Press the Top
Stop softkey on the Speed Adjusted Top Stop screen after a few strokes and read the Operator
Terminal angle display to see where the press stopped. Since the stopping time and distance (angle)
for the press may be different depending on the angular region over which the press stops, the
approximate setting made for High Speed Degrees Before Top Dead Center made in step 8 may not
stop the press as close to top as desired. To refine the adjustment, turn the Run/Program key to
Program so that you can change the setting made in step 8. If the press has stopped X degrees
beyond Top Dead Center, add X degrees to the setting made in step 8. If the press has stopped X
degrees before Top Dead Center, subtract X degrees from the settings made in step 8 for both Low
Speed and High Speed Degrees before Top Dead Center.
10. Repeat step 9, if necessary, until the press is stopping within a few degrees of top each time you
push the Top Stop softkey at the High Speed SPM. It is normal for a small variation to occur in the
stop angle of the press as the press is stopped multiple times. How much variation occurs depends on
the stopping characteristics of the press.
11. As a final step, stay in the Speed Adjusted Top Stop Calibration menu and stroke the press in