Amada 300 Series, Operation Manual

Page: 69 / 80

APPENDIX B: WELD HEAD CONTROL INPUT/OUTPUT SIGNALS
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 B-7
Weld Fire Switch Cable
The 5-foot weld fire switch cable is terminated with an Amphenol 80-MC2M connector (Amada Miyachi
America P/N 520-001) to connect to the power supply weld fire switch cable. Pin 1 is signal and pin 2 is
digital ground. The weld fire switch signal initiates the power supply weld current when the 301H Linear
Actuator (weld head) reaches the programmed weld force.
FOOT SWITCH Connector
The FOOT SWITCH connector uses a 4-pin Amphenol 91-PC4F (Amada Miyachi America P/N 550-006)
bulkhead connector that mates with an Amphenol 91-MC4M (Amada Miyachi America P/N 520-009). The
connections for the two-level FS2L Foot Switch are shown schematically in figure B-5. The pin
assignments are listed in table B-3.
When the foot switch is pressed to the first level, the
Weld Head Control energizes the weld head, causing
the Upper Electrode to descend to the search
position. If you release the foot switch before you
press the foot switch to the second level, the Weld
Head Control will automatically return the upper
electrode to its up position so that you can re-
position the parts. Once the second level has been
reached and the programmed weld force has been
reached, weld current will flow and the Weld Head
Control will automatically return the upper electrode
to its up position.
The FOOT SWITCH connector also accommodates
a reed relay or an opto-coupler to initiate the weld
operation. The emitter of an opto-coupler must be
connected to pin 4.
Figure B-5. Two-Level Foot Switch
Connections