Epson LX-810 Technical Manual page 65

Constant Current Drive Circuit
The constant current drive circuit is shown in Figure 2-33 (for A-phase only), and the waveforms for
each part are shown in Figure 2-34. In Figure 2-33, the reference voltage is indicated by Vref; this voltage
determines the peak current through resistance R30. Resistance R59 and capacitance C 15 determine
the OFF time of the chopper.
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Figure 2-33. Constant Current Control Circuit
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