How does a direct (linear) drive SQUIGGLE drive work?
Direct drive refers to directly driving the SQUIGGLE motor phases at the motors mechanical resonant frequency with two square waves 90 degrees out of phase. By changing the leading phase, the motors direction can be changed. The amplitude of the square wave depends on the motor. For an SQL-1.8 motor the amplitude can be up to 40 volts peak to peak, from 0 to 40 volts. This allows for simple digital control from a micro-controllers PWM peripheral, if available. The voltage to the control board is boosted to 40 volts and fed to the output drive. The NSD-1202 driver IC is a complete drive and control circuit on a single chip. The MC-3300 SQUIGGLE controller is provided with a microcontroller chip and incorporates the NSD-1202 on a small daughter board to demonstrate the control capabilities of the driver chip.
“Direct drive” refers to directly driving the SQUIGGLE motor phases at the motor’s mechanical resonant frequency with two square waves 90 degrees out of phase. By changing the leading phase, the motor’s direction can be changed. The amplitude of the square wave depends on the motor. For an SQL-RV-1.8 motor the amplitude can be up to 11 volts peak to peak, from 0 to 11 volts. This allows for simple digital control from a micro-controller’s PWM peripheral, if available. The NSD-2101 driver IC is a complete drive and control circuit on a single chip. The MC-3300-RV SQUIGGLE controller is provided with a microcontroller chip and incorporates the NSD-2101 on a small daughter board to demonstrate the control capabilities of the driver chip.
