Rorze RD-323MS - ６．Speed Setting; High Speed Trimmer; Low Speed Trimmer

6. Speed Setting
4
６．Speed Setting
☆ Adjustment of Low/High Speed
Owing to the structure of the internal circuit, setting Low
Speed volume will affect the high speed change and vice
versa. Therefore, when setting oscillating frequency
please follow the below instructions.
1) Connect STOP/START terminal to GND potential.
2) Turn SPEED terminal to Low level and then set Low Speed volume to your desired minimum
frequency.
3) Turn SPEED terminal to High level and then set High Speed volume to your desired maximum
frequency.
4) Execute 2) again.
6-1 High Speed Trimmer
You can set the maximum setting of the rotation using this trimmer. The high setting can be set to
any value between 50k to 700kpps. The motor runs at maximum setting when the speed input is at
5V. Figure 6 shows one setting with 700kpps and another with 50kpps.
Fig.6. High Speed Setting
6-2 Low Speed Trimmer
You can set the low speed rotation using this trimmer. The setting will affect the high speed setting
by 14%.
Speed input voltage ±0.7V
Speed adjustment range = ────────────── × High speed setting
5
Low speed setting range
Fig.7. Effect of Low Speed Setting
Fig.5. Speed Adjustment Trimmers
High Speed Trimmer
Max.
Min.
0
200
400
600
800
1000
012345
Speed input voltage (V)
Frequency
（
kpps
）
Low Speed Trimmer: Center
Low Speed Trimmer
Max.
Center
Min.
0
200
400
600
800
1000
012345
Speed input voltage (V)
Frequency
（
kpps
）
High speed VR: Max.
High Speed Trimmer: Max.
LOW GROW HIGH
SPEED TIME SPEED
－ ＋ L S － ＋
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