CHAPTER 1: SYSTEM DESCRIPTION
THIN-LINE
®
SERIES 180M WELD HEADS
1-2
990-133
Weld Force
The weld force is continuously adjustable from a minimum of 22.2 N (5 pounds) to a maximum of 445
N (100 pounds) Settings are quickly reproduced by using the force adjustment knob and easy-to-read
visual scale. An adjustable tare spring allows you to compensate for the weight of non-standard
electrode holders. An adjustment screw allows you to adjust the sensitivity of the force-firing switch.
Weld force is applied via a foot pedal in the case of the manual weld head model. It is applied via an air
cylinder in the case of an air-actuated model.
Adjustable Stops
All of the Series 180M Weld Heads have adjustable upstops and downstops. You can use the downstop
to limit excessive over-travel. You can use the upstop to reduce the stroke and, therefore, the travel time
of the head. This is a particularly useful feature when using the head in an automated system.
Electrode Holders
Electrode holders for the Models 180MF, and 180MA use 6 mm diameter, ES0800M Series Electrodes.
Welding Cables
Depending upon model, either #2 or #2/0 Welding Cables are provided to connect Series 180M Heads to
the power source. Miyachi Unitek Heads deliver maximum performance when used with the
appropriate Miyachi Unitek power sources.
Footpedal Actuation
The Series 180MF Weld Head is manually actuated using the Model MSP, Swing Action Footpedal,
which provides an approximate 5 to 1 mechanical advantage.
EZ-AIR
Actuation
The Model 180A-EZ weld head is equipped with factory-installed EZ-AIR
,
a Miyachi Unitek pneumatic
control that actuates the electrodes and maintains a preset firing force. At a predetermined firing force,
EZ-AIR
closes the inlet and outlet valves to the weld head actuation cylinder and eliminates over-force.
Series 180 air-actuated heads are easy to incorporate into automated welding systems. EZ-AIR can be
energized by most of the Miyachi Unitek power sources, or by a Model FSAC Footswitch. The
Footswitch can be a single or two-level type, dependent upon the power supply and the user's
preference.
For EZ-AIR instructions, see the separate EZ-AIR
Operator Manual supplied with the weld head.
Summary of Contents for THIN-LINE 180 M Series
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