GE VMIVME7697 Dual channel assembly module

The step size sets the amount of rotation per input step. Fifteen step sizes are available using Jumper J6 position 3-4 and DIP switch S1 positions 1-3 as shown. For all Pacific Scientific stepper motors and all 1.8° step motors, step size can be converted to steps per rotation using the following table:Selecting a microstep size of 1/4 or smaller results in: • higher resolution • smoother low speed operation • ability to operate in low-speed resonance regions

Digi tal Elec tronic Damp ing Con trol

Mid-speed instability and the resulting loss of torque occurs in any step motor/drive system due to the motor back EMF modulating the motor winding currents at certain speeds. Mid-speed instability can be explained as a region of potential instability that occurs as a result of the electronic, magnetic, and mechanical characteristics of any stepping motor system. The circuitry used to control this phenomenon does so by advancing or delaying the switching of the output current with respect to the incoming pulse train. This should be taken into account if the user is attempting to employ pulse placement techniques.

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VMIVME Control module of series

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