Advanced Motor Setup
Appendix M
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66
The VXM applies energy to the motors based on the size of the motor. The physical size
is the important aspect that determines the amount energy the VXM will apply. The size
of the motor is proportional to the motor’s current times it’s inductance.
Motors of the same current are not the same to the VXM. When using motors not listed
for use with the VXM, set the VXM to motor setting that has the same or higher current
times inductance value than the motor you wish to use.
setMAmMx set motor type/size selected for axis m and applies 100% power to
motor in jog mode (normally 70% power), m=axis# (1,2,3,4.)
Value for x should be a number between 0 and 6. Refer to the table below for
the proper value to use.
NOTE: The 100% motor power setting only applies to operation in jog mode. Under
program control the “S” and “SA” speed settings set power to motor.
CAUTION: THE VXM MUST BE SET TO THE EXACT MODEL/TYPE MOTOR(S)
BEFORE OPERATING. IMPROPER SETTINGS CAN CAUSE SEVERE
DAMAGE TO MOTORS AND CONTROLLER.
See Also
setMmMx, getMmM
Setting for other Motors
The VXM can be used with motors not listed in the table on the previous page. Motors
that are compatible with the VXM must meet the following criteria:
1. 6 or 8 wire permanent magnet step motor
2. Motor rated at a unipolar per phase current of 0.4 to 4.7 Amps
If the motor you want to use does not meet the above requirements, STOP!
The motor is not compatible with the VXM.
Two important specifications are needed about the motor to be used with the VXM. The
motor’s Unipolar per phase current rating in amps, and the motor’s inductance rated in
Millihenries (MH.) Refer to the motor manufacturer’s data sheet to obtain this
information.
Multiply the current (I) times the inductance (L) to arrive at a product value (IxL) to
compare in the table below.
When determining the VXM value x from the table below, the motor must
be within both the current range and the IxL product.
CAUTION: THE VXM MUST BE SET CORRECTLY BEFORE OPERATING.
IMPROPER SETTINGS CAN CAUSE SEVERE DAMAGE TO MOTORS AND
CONTROLLER.
x Motor Model (Amps)
0 Default (0.4A to 0.7A)
1 Vexta PK245 (1.2A)
2 Slo-Syn M061 (3.8A)
3 Slo-Syn M062 (4.7A)
Vexta PK264 (3A)
4 Slo-Syn M063 (4.6A)
Vexta PK266 (3A)
5 Slo-Syn M091 (4.7A)
Vexta PK268 (3A)
6 Slo-Syn M092 (4.6A)
x
Unipolar
Current Rating
Current Inductance Product
(I x L)
0 0.4 to 0.7 Amps 1 to 14
1 0.8 to 2 Amps 3.3 to 10
2 2.5 to 4 Amps 2.4 to 3.6
1.5 to 1.7 Amps 13 to 14
3 3.5 to 4.7 Amps 3.7 to 5.1
1.8 to 2.0 Amps 11 to 12
4 3.5 to 4.7 Amps 5.2 to 6.9
5 3.5 to 4.7 Amps 7.0 to 12.5
6 3.5 to 4.7 Amps 12.6 to 13
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