KB Electronics Multi Speed Board - Manual (Page 14)

VI. TRIMPOT ADJUSTMENTS (Each Preset)
The KBMG Multi-Speed Board contains trimpots which are factory set for approx. 50% of
base motor speed. Readjustment of the trimpots will be required in order to tailor the con-
trol for a specific application. If the HI and LO jumpers have been changed in accordance
with Figure 4, on page 4, the trimpot ranges will also change. Readjust trimpots as shown
in Figure 14.
WARNING! If adjustments are made with main power applied, an insulated
adjustment tool must be used and safety glasses must be worn. High voltage
exists in this control. Fire and/or electrocution can result if caution is not exercised.
Safety Warning, on page 1, must be read before proceeding.
Preset 1, Preset 2, Preset 3, Preset 4 – Sets the speed of the motor (within the speed
range selected with both Jumpers HI and LO, as described in Section II B, on page 4). For
a higher speed setting, rotate the selected preset trimpot clockwise. For a lower speed set-
ting, rotate the selected preset trimpot counterclockwise. See Figure 14.
12
!
Percent of Range Setting
0
50
100
(Shown Factory Set to 50%)
LO HI R/F
100
Percent of Range Setting
50
75
LO HI R/F
Percent of Range Setting
33
50
66
LO HI R/F
Percent of Range Setting
0
25
50
LO HI R/F
FIGURE 14 – PRESET TRIMPOT vs HI/LO JUMPER SETTING (EACH PRESET)