Dukane DPC II Plus Manuel d'utilisateur télécharger pdf (Page 81)

Dukane Manual Part No. 403–566–01

Section 7 – Process Control Menu

ture to function properly, the fixture must be elec-

trically isolated from the horn support and base as

shown in Figure 7–19. The horn is grounded and

acts as a switch closure when it contacts the fix-

ture. The ground detection is a current limited +5V

DC signal on pin 14 of J901 which is the Thruster

connector on the Press Control module. Ground

detect is normally used with a press system.

The MPC module cannot be used simultaneously

with a Press Control module. If the ground–de-

tect function is needed with a MPC configuration,

connect the ground detect wire from the isolated

fixture to the Iso Auto Stop (pin 9) on the System

Input HD–15 connector. This is a current limited

+22V DC signal. Move the SH704 jumper block

to JU715 and refer to the discussion of the Auto

Stop option under Figure 7–13, since pin 9 is used

to stop the weld in both cases.

Max Weld Time

Maximum Weld Time is the value at which the weld-

ing process terminates regardless of whether the

ground detect signal or scrub process has been ac-

tivated. The data entry screen for maximum weld

time looks the same as the screens shown in Fig-

ures 7–11 and 7–18. Set the maximum weld time

to a value greater than the time required to com-

plete the welding cycle including the scrub time.

SCRUB TIME

0.075 SEC

Scrub Time

Scrub Time is an extension of the welding cycle

which is generated when the ground detect signal

would normally end the weld cycle. This is typi-

cally used in cutting operations. Often the horn

cuts through the material at a single point. This

activates the ground detect to end the weld cycle.

But the cut may not be complete, and the addi-

tional scrub time keeps the ultrasound signal on

to complete the cut. The data entry screen for scrub

time is shown in Figure 7–20. The maximum al-

lowable time value is 0.150 seconds.

Figure 7–20 Ground Detect Scrub Time Data Entry

NOTE

The word AUTO in the menu options is short

for Automation not automatic. Any menu that

contains the word AUTO means the DPC II Plus

will require an external signal(s) from custom

automation equipment for correct operation.

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Dukane DPC II Plus Manuel d'utilisateur Page 81

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