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Full Step Output

The full step output is a high speed MOSFET (open drain) output located at

P1:8. This output will toggle LOW each time the driver makes a full step, and

remain so for the duration of the full step. A full step occurs each time the

Phase A or Phase B sine wave crosses through zero. At zero crossing there

will be full current in one motor winding, zero current in the other. This full

step position is a common position regardless of the microstep resolution

selected.

This high speed output is non-isolated and can sustain maximum driver

voltage. It is capable of sinking up to 25mA.

This output can be used to count the number of full steps directed by the

driver. By so utilizing this output, the user can both measure the

repeatability of the stepper system and track motor position. Please note

that using this output is not closed-loop control, merely a method of

monitoring position and repeatability. It represents full steps commanded by

the driver, not actual full steps moved by the motor.

The application example shown in figure 7.11 illustrates a method where an

up/down counter may be connected to the full step output. The counter will

count the number of full steps up or down based upon the state of the

direction input. The count input of the counter will increment or decrement

with each full step taken.

As noted in the drawing, this is only a representation of a possible

application of the full step output. Additional interface circuitry may be

required between the IM483 and the counter. Check the documentation

provided by the manufacturer of your counter for interface requirements.

Figure 7.11: The Full Step Output Connected to an Up/Down Counter

Full Step Output P1:8

+VDC

Opto Supply

P1:4

Direction P1:3

Up/Down

Count

Controller

Output

Up/Down Counter

NOTE: This drawing represents a possible application

of the full step output. Additional interface circuitry

may be required between the IM483 and the counter!

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Projecta IM2000 Instrucciones de operaciones Pagina 50