Encoder setup

[joel]

Hi,

I am using UCCNC software 1.2.117 with an AXBB-E controller. I am having an issue with the encoder. I am using an optical 360ppr ABZ encoder hooked up to port 2, A is pin 1, B is pin 2, Z is Pin 3.

In the software for the spindle, I defined the AB pins as described and the Z wire to the Index signal also defined as described.

My encoder turns twice for every 1 revolution of the chuck, so I set the PPR in the software to 2880 ( PPR X 4 X 2 ), for the Index pin I set the index prescaler to 2 ( 2 pulses per revolution of the chuck ).

When I try to use a move that needs the index pulse ( like G33 ), nothing ever moves.

When I set up PID control, it seems to use the AB signals and not the index signal. If I change the prescale value, nothing else changes.

I can see the port LEDs change as I rotate the chuck by hand. The index signal seems to be getting ignored.

Any thoughts? Is there another setting I'm missing somewhere?

Thanks!

[cncdrive]

Try to change the encoder count direction in the settings.

[joel]

OK, this worked. Is the AB definition not a standard? The way it is wired, A it to A in the SW.

[cncdrive]

Changing A with B only changes the direction of counting.
The counting can be changed with exchanging encoder A with B or exchanging the motor positive rotation direction.
So, there is no standard for which one is A or B because it also depends on how the motor is wired and controlled.

[joel]

Thanks!