Intelligent Motion Systems MForce PowerDrive Plus MForce Series Microstepping PowerDrive - Manual (Page 34)

16 Microstepping MForce PowerDrive Manual Revision R040507
Figure 2.3.6: 4 Lead Motor Connections
1
3 4
2
P4
PHASE A
PHASE A
B PHASE
PHASE B
4 Lead Motors
4 lead motors are the least flexible but easiest to wire. Speed and torque will depend on winding
inductance. In setting the driver output current, multiply the specified phase current by 1.4 to deter-
mine the peak output current.
Recommended Motor Cabling
As with the power supply wiring, motor wiring should be run separately from logic wiring to minimize noise
coupled onto the logic signals. Motor cabling exceeding 1’ in length should be shielded twisted pairs to reduce
the transmission of EMI (Electromagnetic Interference) which can lead to rough motor operation and poor
system performance.
Cable length, wire gauge and power conditioning devices play a major role in the performance of your MForce
PowerDrive and Stepper Motor.
NOTE: The length of the DC power supply cable between the MForce PowerDrive and the Motor should not
exceed 50 feet.
Example A demonstrates the recommended cable configuration for the MForce PowerDrive to Motor cabling
under 50 Feet long. If cabling of 50 feet or longer is required, the additional length can be gained with the cable
configuration in Example B.
Correct AWG wire size is determined by the current requirement plus cable length. Please see Table 2.3.1 on the
following page.
Example A: Motor Cabling Less Than 50 Feet
Shield to Earth Ground
on Supply End Only
Ferrite Beads
Cable Length
less than 50 Feet
MForce
PowerDrive
Phase Outputs
Motor
Connections
Shielded/Twisted Pair
A
A
B
B
A
A
B
B
Figure 2.3.7: Motor Cabling Less than 50 Feet