The application of Delta VE series inverter in CNC machining center (4)

December 01, 2022

Pulse control currently offers two modes: speed mode and position mode. When working in speed mode, only need to set the frequency source signal to pulse reference, and set the given mode according to the pulse signal provided by the host computer; if the inverter needs to work in the pulse position command mode, in addition to the parameters in the speed mode In addition to the settings, it is also necessary to match the closing of the external terminal signals FWD/MI1/MI2/MI3.

3.4 VE series inverter pulse input control

VE series inverters support two pulse input modes: 1.A/B phase pulse input; 2. Pulse + direction input. Since the new system provides a pulse + direction output mode, you can choose the third or fourth mode as shown in Figure 3; then make the final correct selection based on the direction.

Figure 3 Accepted pulse input method

When using pulse control, there are two other parameters that are also very important: 1.10-17PG electronic gear A; 2.10-18PG electronic gear B. The calculation formula is speed = pulse frequency / number of encoders (10-00) * electronic gear A / electronic gear B.

3.5 acceleration and deceleration characteristics

For the test of acceleration and deceleration characteristics, first adjust the protection function appropriately:

1-12=1, 1-13=5, F=590

The measured acceleration time is 1.4s during the acceleration from 0 to 590hz, and the maximum current during acceleration is 19.3A. See Figure 4 for the graph.

Figure 4 acceleration curve

1-12=5,1-13=5, F=590

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