APPENDIX C: WELD HEAD DYNAMICS
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
C-4
990-115
The Model 301H Linear Actuator, on the other hand, has the unique feature of a programmable follow-up
force that is independent of the weld force. You can optimize both the weld force and the follow-up
movement to get the best possible weld head dynamic behavior by:
Setting the follow-up delay time (DLY) to cause the follow-up force to occur when the electrode
should be accelerating into the weld material during follow-up, and
Adjusting the follow-up force magnitude and duration (FWUP) to maintain the proper force on the
weld material while the electrode is moving.
As a general guide for programming FWUP, multiply 2.5 lbs per each 0.001 inch (44.6 Kg/millimeter) of
electrode displacement, then add this new constant to the weld force value. Use the combined total as the
new programmed follow-up force. For example:
Given:
Existing weld force
10 lbs (4.54 kg)
Electrode
displacement 0.004
in.
(0.10
mm)
New Constant:
(2.5/0.001) × 0.004 = 10
New FWUP Force:
New co existing weld force = 10 + 10 = 20 lbs. (9 kg)
This degree of control and flexibility allows the Series 300 Fast Response Weld Head System to execute
consistently high quality welds.
Summary of Contents for 300 Series
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