Z axis won't stabilze

[jrweaver@jrsgunworx.com]

Thought I had posted this question already, yet now can't find it. 
I've built the dro board and bluetooth via the kit and installed the X and Z axis i-gauging scales on a Grizzly 704 mill. The x axis seems fine and is stable. zero's out yet haven't calibrated it yet to may it useful. For the z axis, have removed the stock "depth" read out the mill comes with and mounted a i-gauging scale cut to length and mounted in the same manner as the stock unit. When at the fully retracted position, it steps up and keeps climbing. Won't stop climbing until I move it down about an inch, sometimes more. Also won't zero, when I zero it defaults to .5". Have turned on the filtering and set it to 3 digits as that's about as precise and the mill can do anyway. Yet can't get it to stabilize. Can't use it with the readout jumping all over the place. 
Have checked all my connections and switched the cable to another axis as an attempt to see if it's the scale or the board. It jumps all over on that scale also, so it seems like it's the scale causing the problem. Where do I begin to troubleshoot such an issue?

[Yuriy]

Thought I had posted this question already, yet now can't find it. 
I've built the dro board and bluetooth via the kit and installed the X and Z axis i-gauging scales on a Grizzly 704 mill. The x axis seems fine and is stable. zero's out yet haven't calibrated it yet to may it useful. For the z axis, have removed the stock "depth" read out the mill comes with and mounted a i-gauging scale cut to length and mounted in the same manner as the stock unit. When at the fully retracted position, it steps up and keeps climbing. Won't stop climbing until I move it down about an inch, sometimes more. Also won't zero, when I zero it defaults to .5". Have turned on the filtering and set it to 3 digits as that's about as precise and the mill can do anyway. Yet can't get it to stabilize. Can't use it with the readout jumping all over the place. 
Have checked all my connections and switched the cable to another axis as an attempt to see if it's the scale or the board. It jumps all over on that scale also, so it seems like it's the scale causing the problem. Where do I begin to troubleshoot such an issue?

Try turning the head around. Someone had issues similar to what you are having when they accidentally installed the head backwards.

[jrweaver@jrsgunworx.com]

Hi Yuriy
Thanks for the response. turned the head around and it stabilized that scale when I plugged into the Y port on the board I built from the kit. Yet now, when I plug any scale into the z port it exhibits this increment jump issue. Has some portion of the circuit messed up that it won't stay stable? Where do I start troubleshooting this? Checked all of the solder joints and their ok, yet don't know what else to check. And the Z axis always goes to .5 inch when I zero the readings. tried to reset just that scale via another forum message with a fix to that issue a while back yet the programming seems to always default to .500 on just that scale and switches to a default mode at the same time. Won'[t stay in the absolute mode when zeroing.

Suggestions.

[Ralphxyz]

and the answer is?

[jrweaver@jrsgunworx.com]

No reply????