Spin Welder User’s Manual
Section 7 – Operational Setup
Page 57
Page 56
Dukane Manual Part Number 403-547-03
Dukane Manual Part Number 403-547-03
cal, so the chart is more than adequate for setting
the speed control.
For example, a setting of 500 (50.0%) results in a
motor speed of 875 RPM for the 5 HP and 1750
RPM for the 3 HP motor. The maximum setting is
999 (99.9%). At less than maximum speed, the vari-
able frequency drive maintains a fairly constant HP
output from the motor. This means that the torque
increases as RPM decreases. At low motor speeds,
the rotor–stator structure behaves like a transformer
which does not work well at low frequencies, The
lowest practical usable setting is about 100 (10%)
which is 350 RPM for the 3 HP Below this, the
motor may fail to reach the selected RPM within
the controller’s acceleration time window.
User Interface
Power Up Sequence
1. When the Spin Welder is initially powered up,
the LCD display will light and remain blank for
approximately one second.
2. The processor then tests the display for one
second by turning on every pixel.
3. The display is again cleared and the processor
verifies the system memory.
4. If all test pass, the processor displays the boot
code powerup screen for one second.
5. Then two operating system screens are briefly
displayed.
MicroView
Core: 1.01(c)1995
MicroView
FRN: 1.01(c)1995
MicroView
MicroLogix DF1
Figure 7–7
Motor RPM Conversion Chart
3000
3500
2500
2000
1500
1000
500
1300
1500
1750
1000
800
500
300
400
600
900
1100
1200
1400
1600
1700
700
200
100
800
900
999
700
600
500
400
300
200
100
000
Speed
Setting
(0—999)
5 HP
Model
(RPM)
3 HP
Model
(RPM)
