Motoman XRC Series User Manual

THEORY OF OPERATION
Spot Welding Manual for Medar 3-12 MOTOMAN
AVC strives to deliver a constant “area” of a sine wave (i.e., a constant percentage
of available heat). So its waveform will always look relatively constant. Constant
Current doesn’t care about the waveform. It will regulate as necessary to deliver a
constant amount of current. Figure 3-13 shows how the waveform differs between
the two modes.
Figure 3-13 AVC Mode (top) vs. Constant Current Mode
Constant current control will always deliver the requested current as long as the
tool capacity allows it. While AVC current drops over time due to increased
secondary resistance, Constant current doesn’t have this problem.

Motoman XRC Series Specifications

General

Programming Language	INFORM III
Communication Ports	Ethernet
Power Requirements	200-220 VAC single phase, 50/60 Hz, 1.5 kVA
Mounting	Floor mount
Operating Temperature	0°C to 45°C
Humidity	20% to 80% (non-condensing)
Storage Temperature	-20°C to 60°C