Servo Robot Gun; Medar Integrated Weld Control - Motoman XRC Series Manual

1.3.3

Servo Robot Gun

The Motoman servo gun, when provided with the integrated welding package,
improves productivity and provides high quality welds. The servo motor variable
controls allow operators to program an exact force and ensure that force is accurate
and repeatable for every weld. A servo gun also allows the operator to control the
contact speed, thus minimizing deformation of the sheet metal and protecting the
welding electrodes, which improves weld quality.
Servo-controlled welding guns offer many advantages over pneumatic welding
guns. The electric servo motor runs silently, eliminating noisy exhaust sounds, and
is more energy efficient than the air compressors used with pneumatic guns. Servo-
controlled guns also increase flexibility with multi-position welding.
1.3.4

Medar Integrated Weld Control

The MedWeld 3006 weld control with the Medar integrated weld processing board
provides a single point of programming control from the XRC pendant menu. A
single MedWeld cable provides the interface between the weld control and the
processing board in the XRC controller, eliminating the need for multiple discrete
I/O cables.
The advantages of the Medar integrated weld control are:
• Quicker response time due to elimination of discrete I/O filtering (150 ms/spot)
• 255 weld schedules
• Stepper profile
• Ability to program weld sequences with the XRC pendant
• Reduced wiring, smaller enclosure, and lower cost
• Network capabilities with a MedLan cable
• Identical software and processing board for both AC and MF (mid-frequency)
DC spot welding
• Medar pendant is not required
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• Easy file backup:
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The Medar weld control supports either AC or MFDC (mid-frequency direct
current) welding. AC and MFDC modes are selected by a parameter in the
controller (S2C373). The XRC menus for the two modes are identical, with only
minor changes in nomenclature.
MOTO MAN
Weld schedules and basic setup parameters can be programmed on the
XRC pendant
All Medar alarms are displayed on the Motoman pendant
Medar weld schedule is stored in XRC CMOS memory as a spot welding
condition file
Spot welding condition file can be saved/restored to/from the PCMIA
memory card using the XRC pendant
Welding condition files can be transmitted to a remote PC via serial or
Ethernet communications
1-5
INTRODUCTION
SpotWelding Manual for Medar