Guest
Show Posts
3101
General Mach Discussion / Re: No Motor Movements -- Newbie
« on: September 05, 2014, 04:54:59 AM »
An ‘Active Low’ signal is normally high (approx. 3.3V or 5V) and goes low (0V) when it is enabled.
It is the opposite for ‘Active High’ they are low (0V) and go high (approx. 3.3V or 5V) when enabled.
As said, your motors should ‘lock’ when the board is powered-up (irrespective of any combination of step and direction pin settings / allocations) so you need to find which pin or pins provide the Enable signal / signals. It will, of course, be one or more of the Output pins 1-9, 14, 16, 17.
Try them each in turn first active high then active low – when you can’t rotate any of the stepper motors then you have found the pin / pins and it’s / their active state.
Then you can proceed to confirm which are the correct step and direction pins for each axis (although I think you already know that but check again to be sure).
Tweakie.
It is the opposite for ‘Active High’ they are low (0V) and go high (approx. 3.3V or 5V) when enabled.
As said, your motors should ‘lock’ when the board is powered-up (irrespective of any combination of step and direction pin settings / allocations) so you need to find which pin or pins provide the Enable signal / signals. It will, of course, be one or more of the Output pins 1-9, 14, 16, 17.
Try them each in turn first active high then active low – when you can’t rotate any of the stepper motors then you have found the pin / pins and it’s / their active state.
Then you can proceed to confirm which are the correct step and direction pins for each axis (although I think you already know that but check again to be sure).
Tweakie.
