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166006-1CD
166006-1CD
1
Introduction
1.3 Positioner Configuration
RM2-755/1255SL
Positioner
1.3 Positioner Configuration
The Positioner assembly is available in two configurations (755 or 1255).
The main (sweep) axis AC servomotor and tooling (orbital) axis AC
servomotors are located on the headstock swingarm of the Positioner.
This configuration, along with other proprietary features, endow the
Positioner with an exceptional Total Index Time (refer to
755/1255SL Positioner Technical Specifications” on page 4-1
for a
complete listing of specifications).
1.4 Welding Ground System
The Positioner incorporates spring-loaded carbon brushes to connect
each tooling plate to the welding ground system. A group of three carbon
brushes for the 755 and 4 carbon brushes for the 1255 contact the
posterior side of each tooling plate. The negative (–) ground cable to the
welding power source is connected to a ground block located inside the
Positioner headstock swingarm assembly.
1.5 Major Components
The Positioner includes the following major components –
• One tooling drive housing assembly (headstock)
• One main drive housing assembly (tailstock)
• One main (sweep) axis Sigma-5 servomotor (and associated gear
reduction unit)
• Two tooling (orbital) axes Sigma-5 servomotors (and associated gear
reduction units)
• One arc screen
• Two Positioner-to-Controller interconnect cables (power and
encoder)
• One assembly kit for the Controller (servo packs, etc.)
1.5.1 Optional Equipment
This manual documents a standard Motoman Positioner assembly. If the
Positioner assembly is modified or incorporates optional equipment, refer
to the Engineering Drawing Package and associated Bill of Materials
(BOM) in addition to this manual. The Engineering Drawing Package and
BOM are included with the Positioner shipment. Please refer to those
documents, along with this manual, when troubleshooting or provisioning
spare parts for the Positioner assembly.
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