Dukane iq series User Manual page 87

4) System Freq Limits
Limits can be: Wide, Normal, Narrow, or Manual.
Wide - In wide mode the upper and lower
frequency limits are set to the maximum and
minimum allowed frequencies for the genera-
tor. These values are dependent on the system
frequency of the generator.
In Normal mode the upper and lower
Normal -
frequency limits equal the free run frequency -
500Hz.
In Narrow mode the upper and lower
Narrow -
frequency limits equal the free run frequency -
200Hz.
Manual -
In Manual mode the user sets the
upper and lower frequency limits. To be valid,
the settings must be within the maximum and
minimum values for the generator and at least
25Hz greater than the "upper" free run frequency
and 25Hz less than "lower" free run frequency.
Manual - Enter Upper and Lower Limits
Normal, Narrow, or Wide - Enter Upper and
Lower Limits within prescribed limitations for
your particular generator.
5) Ramp Up Time
Ramp up time increases the amplitude linearly in
the programmed time period at the start of the weld,
from zero to the programmed amplitude level. This
brings the stack up to operating amplitude smoothly
preventing shock stress.
Range is 0.000 to 1.250 seconds.
6) Ramp Down Time
Ramp down time decreases the amplitude linearly to
zero in the programmed time period following the
end of the weld, when ultrasound is shutting off.
Range is 0.000 to 0.250 seconds.
Dukane Manual Part No. 403-586-02
Continued from Previous Page
Section 5 - Operation
Page 79