Hi,
The LEDS on the output go on and off with Left and right arrow keys (They follow)
Are the step LEDs operating. At any reasonable speed the step signals are so fast that you cannot distinguish between on or off
but rather see a dimming of the LED. Do you observe this?
If the LEDs are turning on and off then:
Mach is signalling the ESS,
the ESS is signalling the C11,
the C11 should be signalling your stepper drivers. If the drivers are not running the fault is your drivers, or your enable signal to the drivers
or your steppers.
Craig