[jallist] Step motor conections.
> I would like to know which are the connections for the example 3 of thefrom the file:
> Jal manual.
-- port B drives 2 4-phase stepper motors via an ULN2803.
-- a0 and a1 are connected to 2 white-is-low reflective sensors.
-- a2 and a3 drive 2 LEDs which show the state of the sensor inputs.
I guess that your problem is with the stepper motors? pins b0 .. b3 drive
(via the ULN2803) one stepper, pins b4..b7 the other stepper. Each stepper
has 5 or 6 wires. With a 5 wire stepper the common goes to +5V, the other 4
to the ULN2803 outputs. You'll have to find out the order for yourself....
With a 6 wire stepper there are two groups. The commons from both groups go
to +5V, the other 4 are wired in the order
- one from group 1
- one from group 2
- the other from group 1
- the other from group 2
This leaves two possibilities open, of which only one will work. Again
you'll have to find out for yourself....