MK Products MK 2000A - Manual (Page 16)

MK 2000A - Owner's Manual - Page 16
Wire Diameter
To obtain the smooth one drop transfer during the peak level the “On” time
(pulse width) must be varied, depending on the wire diameter. For example,
.030 requires 1/2 of a millisecond and .045 requires 1-1/2 milliseconds. The
WIRE DIAMETER Control on the MK 2000A therefore sets the "ON TIME"
(pulse width).
Pulse Level
Because different alloys melt at different temperatures, the height of the pulse
must also be varied. The PULSE LEVEL therefore limits the height of the
pulse depending on the alloy. For example, the Pulse Level for 4043 is set
to 60 (60% of 300 Amps = 180 Amps) whereas 5356 with its higher melting
temperature is set to 71 (71% of 300 Amps = 213 Amps Max.).
Heat
When changing plate size or for fine tuning, the “HEAT” Control may be
adjusted. With the "ON TIME" (pulse width) preset by the Wire Diameter
control the Heat control moves the pulses closer together (more heat) or
further apart (less heat) without changing the pulse width. Figure 6. Keep in
mind that when you increase your heat you must also increase wire speed.
Note: When operating in the Frequency Width mode the frequency and pulse
width are set independently of each other. Increasing the frequency in this
mode decreases the "ON TIME" (pulse width) proportionately.