Thanks for your input. The easy driver uses a stepper driver chip that has all the logic and drivers built in.
All it requires is input for step size, direction and a step pulse.
I’ve solved the ramping of step pulses by adding an RC circuit and a transistor between the timming resistors R1 of the astable 555 and Vcc, as the capacitor charges the transistor slowly turns on effectively ramping the frequency of the step pulses.
I bread boarded the circuit and it work perfectly. The stepper motor slowly ramped speed, to the preset speed, set by R1, of the astable circuit without locking into resonsnce.