Oriental motor BLE2D60-A - Adjusting the Rotation Speed of Two or more Motors by a Single Setting Device (Multi-Motor Control)

How to use
46
PreparationSafety precautions Help Appendix
7. Adjusting the rotation speed of two or more motors by a single setting device
(multi-motor control)
Multiple motors can be operated at the same speed using a single variable resistor or external DC voltage.
•
Change the "Speed, torque limiting command selection" parameter (ID: 1820) to "1" or "2" of the analog setting when operating
in this method.
When setting to "1": Selecting the data No.1 makes the rotation speed the analog setting.
When setting to "2": Selecting any of the data numbers makes the rotation speed the analog setting.
•
A connection example shown below applies to products for the single-phase power supply. In the case of products for the
three-phase power supply, connect the power supply line to a three-phase power supply. Connections of motors and I/O
signals are omitted in the gure.

When using a variable resistor
Connect the drivers as shown below.
When using a variable resistor, operate products of 20 units or
less.
Calculation method of resistance (VRx) when the number of
drivers is n
Resistance (VRx) = 20/n (k), n/20 (W)
Example: If two drivers are used
Resistance (VRx) = 20/2 (k), 2/20 (W)
Therefore, the resistance is calculated as 10 k, 1/10 W.
Speed
setting
line
Va
riable resistor
VRx
13
2
Driver 1Driver n
VM
VL
L
N
L
N
VH
VM
VL
VH
Power supply
input
Power
line

When using external DC voltage
Connect the drivers as shown below.
Calculation method of current capacity (I) of external DC
power supply when the number of drivers is n
Current capacity (I) = 1 × n (mA)
Example: If two drivers are used
Current capacity (I) = 1 × 2 (mA)
Therefore, the current capacity is calculated as 2 mA or more.
DC power
supply
0 to 10 VDC
Speed
setting
line
Driver 1Driver n
VM
VL
L
N
L
N
VH
VM
VL
VH
Power supply
input
Power
line

How to adjust the speed dierence
To adjust the speed dierence among the rst motor and the second and subsequent motors, change the parameter or connect
a resistor to adjust.
z
Adjustment by the parameter
The speed dierence can be adjusted by changing the "Analog operation speed command gain" parameter (ID: 1821) and
"Analog operation speed command oset" parameter (ID: 1822) for the second and subsequent drivers. This section explains how
to adjust with the "Analog operation speed command oset" parameter.
Refer to p.60 for how to set the parameter.
•
When the speed of the second motor is slower than that of the rst motor:
Set the oset value to rotate faster (positive side) with the "Analog
operation speed command oset" parameter.
•
When the speed of the second motor is faster than that of the rst motor:
Set the oset value to rotate slower (negative side) with the "Analog
operation speed command oset" parameter.
0
Rotation
speed
Range of oset
(–2000 to +2000 r/min)
Setting voltage
Positive
direction
Negative
direction
z
Adjustment by a resistor
Connect a resistor of 470
Ω
, 1/20 W to the terminal VM
on the driver 1 and connect a variable resistor VRn of
1k
Ω
, 1/20 W to the driver 2 and subsequent drivers.
470 Ω
1/20 W
VRn
1 kΩ
1/20 W
Speed
setting
line
Driver 1Driver n
VM
VL
L
N
L
N
VH
VM
VL
VH
Power
supply
input
Power
line