Need Help!- Are my encoders wired correctly?

[RP Designs]

Ok, I just ran an encoder check with the control and I just nee to verify that the wiring is correct. My x, y, and z axis are correct and they count up in one direction and down in the other so I am ok with that aspect. My question has more to do with directionality. My x-axis counts up when moving from the operators left to right, and counds down when moving in the opposite direction. My y-axis counts up when moving towards the operator and counts down moving away and my z counts down moving out (quill extended) and counts up when the quill is retracted.
I have my limit switches set with x- with the table all the way right, y- with the table all the way forward and z- with the quill fully retracted. Looking at the encoder signals has me thinking that my limit switches are wrong and I should re-wire.
Thoughts?

[Al_The_Man]

If this is table movement on a mill then it sounds like the X is backwards Y is correct.
If it is actual spindle movement, then X is correct and Y backwards.
Z correct.
Al.

[jalessi]

Here is a diagram for future reference.

[RP Designs]

Originally Posted by Al_The_Man If this is table movement on a mill then it sounds like the X is backwards Y is correct. If it is actual spindle movement, then X is correct and Y backwards. Z correct. Al.

This is a knee mill with movable quill. Based on the diagram, my Y is backwards. Which leads would be wrong in this case? I was very careful to wire all three encoders the same, so it seems odd that they are backwards.

[Al_The_Man]

The movement assumes the spindle is moving in X & Y, so if the spindle is fixed and the table moves, the table has to move in the opposite direction in order to comply.
One of the reasons the encoder can be reversed will depend on how the motor is oriented, facing into the axis or turned backwards to the axis.
This can be reversed in the controller or swapping the A & /A signals, but the command has to be reversed also.
It depends on what you are using as a controller.
Al.

[RP Designs]

I just went out and checked continuity on my wiring and everything is as it should be.
Al these are the same Fanuc 5m motors I got the wiring codes from you which are:
From the ampheterenol connector:

A=A
B=B
C,J,K =+5V
N,P,T=COMM
D=/A
E=/B
F=Z
G=/Z

The db9m connector should be:
1=n/c
2=gnd
3=/z
4=a/
5=b/
6=z
7=a
8=b
9=+5v

I have checked them out and all are as they should be. could the encoder be wired wrong in the motor housing? I haven't touched it, so it shouldn't be. Do you happen to have a wiring diagram for the encoder itself?

[RP Designs]

Originally Posted by Al_The_Man The movement assumes the spindle is moving in X & Y, so if the spindle is fixed and the table moves, the table has to move in the opposite direction in order to comply. One of the reasons the encoder can be reversed will depend on how the motor is oriented, facing into the axis or turned backwards to the axis. This can be reversed in the controller or swapping the A & /A signals, but the command has to be reversed also. It depends on what you are using as a controller. Al.

The motor is turned with the encoder facing the mill and the drive gear facing the operator. Actually that makes sense, so I will leave it for now. The control is the Ajax cnc control. I just powered it up for the encoder test, so I haven't really played with it at all. I did send a message over to Scott and am waiting to hear back.

[Al_The_Man]

Like I said, it can be changed either in the control or by swapping the A pulses, it depends on what controller you are hooking it up to.
Usually it is no big deal, as long as you are at least getting the correct count, then the reversal may be just a setting.
Al.

[RP Designs]

Thanks Al. I think I have it sorted now. Appreciate the help as always!