User`s manual

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REDUCING OUTPUT CURRENT STEP MOTOR CONFIGURATIONS
The amount of current per Phase in the reduction mode is related to the value configuration requires different current settings. Different lead configurations
of the current adjustment potentiometer (Running Current) and the current and the procedures to determine their output current are shown below .
reduction potentiometer (Reduced Current). When the current reduction circuit
is activated, the Reduced Current resistance is paralleled with the Running
Current resistance. This lowers the total resistance value, and thus lowers the 6 Lead Motors
selected Phase output current by a percentage. When configuring a 6 lead motor in a half-coil configuration (connected from
Pot 1.4 AMPS 2 AMPS 3 AMPS 4 AMPS 5 AMPS 5.5 AMPS
1 50% 42% 32% 26% 22% 21%
2 61% 53% 43% 36% 31% 30%
3 70% 64% 54% 46% 41% 39%
4 75% 70% 61% 54% 48% 46%
5 80% 75% 67% 59% 54% 52%
6 82% 78% 71% 64% 58% 56%
7 84% 81% 75% 68% 63% 61%
8 86% 84% 77% 71% 66% 64%
9 89% 88% 83% 78% 74% 72%
TABLE 4: Percentage of I(peak) settings on Reduced Current Potentiometer
MOTOR SELECTION
The DPD60001 Driver Pack contains a bipolar Microstep driver working equally
well with 4, 6 or 8 Lead Step Motors ( Series, Half Coil, or Parallel Motor
Configurations respectively).
Motors with low current ratings and high inductance will perform better at low
speeds, providing higher low-end torque. Motors with high current ratings and
low inductance will perform better at higher speeds, providing higher high-end
torque. Since the DPD60001 is a constant current source, it is not necessary
to use a motor that is rated at the same voltage as the supply voltage. It is
important that the DPD60001 be set to the appropriate current level based on
the motor being used.
Step motors can be purchased in configurations of 4, 6 or 8 leads. Each
one end of the coil to the center tap) use the specified per Phase (or unipolar)
current rating to determine the current adjustment pot setting. This
configuration will provide more torque at higher speeds.
When configuring the motor in a series configuration (connected from end to
end with the center tap floating) multiply the per Phase (or unipolar) current
rating by 0.7. Use this result to determine the current adjustment pot setting.
WARNING! Step motors will run hot even when configured correctly. Damage
may occur to the motor if a higher than specified current is used. Most
specified motor currents are maximum values. Care should be taken to not
exceed these ratings.