Minarik MMRG30U, User Manual, Page: 38 / 52

31
MMRG Series
Replace the speed adjust potentiometer with a series of resistors with a
total series resistance of 10K ohms (Figure 17). Add a single pole, multi-
position switch with the correct number of positions for the desired
number of fixed speeds.
Multiple Fixed Speeds
R1
R2
R4
TOTAL SERIES
RESISTANCE
10K OHMS
R3
S0
S2
S1 or S3
Figure 17. Multiple Fixed Speeds