– 29 –
– 28 –
<Note>
Calibrate the scale of the tachometer (TM) from the potentiometer on
the rear panel.
1. While running the motor at its full rotation speed without load,
adjust to 1450 min
–1
if power supply is at 50 Hz, or 1750 min
–1
if 60 Hz.
2. Monitor the output signal of the TG on an oscilloscope and de-
termine the frequency. And adjust:
rotating speed N (min
–1
) = 5 x f (Hz)
Caution: Since the circuit is not isolated from the power supply,
use an insulated tool such as an insulated screwdriver to pro-
tect against electric shock.
External braking resistor (DV0P003)
5.6 Ω 10 W
<Precautions>
The resistance of DV0P003 is 5.6 Ω. When using commercially avail-
able resistor, choose 4.7-6.8 Ω, 10 W or larger.
ø3.8
12
33
±
3.0
0.5
4.8
±
0.5
(ø2.5)
9
+
3
–1
3
10.5
±
1.5
(2.2)
0.8
6
±
0.5
14
±
1
10.5
±
1.5
48
±
2
(0.6)
Unit: mm
5. Options
Tachometer (DV0P001)
This tachometer is especially designed to operate with our speed
controller so that it can provide easier displaying of motor speed.
65
max40
12.2
8
±
1
8.5
60
48
±
0.3
ø54
±
1
48
48
Input terminal
Potentiometer
for calibration
2–M3
Mounting
screw
48
±
0.3
Panel cutout drawing
2–ø3.5 hole
Pin No.
4
5
Pink
Pink TG
TM
Motor
Speed controller
Unit: mm
<Precautions>
· Connect the tachometer in parallel with the tachometer generator
(TG).
· If the tachometer (TM) requires longer connection cable, use shield-
ed twisted pair cable. Don't ground shielding of the cable.
· Accuracy of tachometer readings will depend on variation in motor
performance and operating environment (temperature and noise).
The tachometer should be used as a rough indicator.
