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April 17, 2000 Manual Version 1.0
A.8
Before calibrating the slide, we MUST make sure the slide is properly counterbalanced, if a
counterbalance is used on our press. If the slide is not properly counterbalanced, the slide calibration
will be flawed because clearances will not be taken up by the counterbalance.
Now we press the “CALIBRATE SLIDE” softkey to perform the actual slide calibration as described in
section 4.2.2.2. We need to know the resolver turns (100) for calibration.
After calibration, the “Present Position” field in the slide configuration screen should display the number
we just entered for the lower calibration point. In this example, assume we had entered 14.074 inches
for our lower calibration point.
Now we take the press back to the top of the stroke. With the slide adjust switch on, “JOG UP” and
“JOG DOWN” softkeys should be displayed in the slide configuration screen.
Using the jog keys, we raise the slide to verify that the upper mechanical limit switch works correctly.
Be very careful as the slide approaches the true maximum shut height (16.000 inches in this example)
as the upper limit switch may be inoperative or misadjusted. Replace or adjust the limit switch as
necessary.
In the same way, we verify that the lower mechanical limit switch works correctly. Again for emphasis,
be very careful as the slide approaches the true minimum shut height (12.500 inches in this example) as
the lower limit switch may be inoperative or misadjusted. Replace or adjust the limit switch as
necessary.
If desired, the “Upper Limit” and “Lower Limit” can be set to be more restrictive than the actual
minimum and maximum shut heights. For rotary transducers, the upper and lower limits should never
be set outside the actual minimum and maximum shut heights.
Next we go to the “Mode” line of the system and turn it “ON” by cycling through the choices with the
“CHANGE MODE” softkey.
The last thing we must do is verify that the “Pulse Distance” and “Pulse Time” settings work for our
press. These settings affect how automatic adjustment works. We hit “Exit” twice to return to the “Auto
Sets” screen and hit the “RESET ERROR” softkey, if necessary, to clear errors in the slide adjust
system. The slide setpoint should also be set to some reasonable value. In this example, the slide should
still be at our calibration point of 14.074 inches. We set the slide setpoint to 14.000 inches.
After clearing errors, if present, we go back to the slide configuration screen. With the slide adjust
switch on, we should see “JOG UP”, JOG DOWN”, and “AUTO ADJUST” softkeys. Again we check
to make sure the slide is properly counterbalanced. If it is not then the following tests will be
meaningless. An under or over counterbalanced slide will not move the same way that a properly
counterbalanced slide will.
For fine adjustment purposes, a momentary push of the “JOG UP” or “JOG DOWN” key will “pulse”
the slide motor starter for “Pulse Time” seconds. We hit a jog key to see how far the slide moves with
one pulse. Ideally, it should take around 2 pulses to move .001 inch. We hit the “JOG DOWN” key and
find that it takes 5 pulses to move the slide .001 inch - too many. We change the “Pulse Time” value to