Homing Script Gantry Squaring

Hey guys I recently overhauled an old MultiCAM router with a new controller and am using Mach3. Everything is set up and running great but Im trying to solve an issue with my auto gantry squaring script while homing.

The issue is that currently X is set up with two steppers at each end of the gantry like a typical setup. When I home X and A home together but only activate off the X switch. Now I went into settings and there is no change if "Home Slave with Master" is selected or not.

However, when I go to Config->Slave Axis and unslave the A axis, restart Mach3, and run the same homing script again it works as intended and A will correct itself to it's own switch squaring the gantry. I then have to re-slave and restart Mach3 again.

I'd like to not have to go through that process and it home without having to mess with the slave axis settings.
I feel like I'm missing something in my script (below). I tried using CoupleSlave commands with no luck (shown in comments in script where). Any help would be appreciated. I have the feeling I need to enable independent A movement somehow.

Also site won't let me upload XML?

Code:

---

       
' Ref all home Script

'Home Z
DoButton( 24 ) 'Z (4)
While IsMoving
Sleep(25)
Wend
DoOEMButton(135)
Sleep(500)

'Home Y
DoButton( 23 ) 'Y (2)
While IsMoving
Sleep(25)
Wend
Sleep(500)
DoOEMButton(134)
Sleep(500)

'Home X and A Together
RefCombination(9)
While IsMoving
Sleep(25)
Wend
Sleep(5000)

'Square Gantry Check
Message "Going into Square Check"
SquareCheck
Message "Done"

Sub SquareCheck()

If IsActive(XHome) Then
        Message "X Active If 1"
        If IsActive(AHome) Then
                DoOEMButton(133)
                Message "Gantry Already Square 1"
                Exit Sub
        End If
       
        Message "X Home, Homing A"
        DoOEMButton(357)
        ' I TRIED CoupleSlave(0) COMMAND HERE WITH NO SUCCESS
        Sleep(500)
        DoButton(25)
        Message "Squared A"
        DoOEMButton(358)
        ' ReCouple CoupleSlave(1)
        DoOEMButton(133)
        Sleep(500)
        Exit Sub
End If

If IsActive(AHome) Then
        If IsActive(XHome) Then
                DoOEMButton(133)
                Message "Gantry Already Square 2"
                Exit Sub
        End If
        Message "A Home, Homing X"
        DoOEMButton(357)
        'CoupleSlave(0)
        Sleep(500)
        DoButton(22)
        Message "Squared X"
        DoOEMButton(358)
        'CoupleSlave(1)
        DoOEMButton(133)
        Sleep(500)
        Exit Sub
End If
Exit Sub
End Sub

---

Using an XHC USB Mach3 Motion Control Card Mk4 (link)

The issue is most like due to your XHC controller.
Most chinese Mach3 controllers have a lot of issues with homing and probing.

Hey Ger,

Thanks for the input, your old posts have been a great help in this projects so far.
Why is it you think it's the controller if changing settings in Mach3 (unslave, home then reslave) works correctly?

And what is it that most Chinese controllers are doing wrong that causes issue with homing and probing? I ask because I have designed a couple machines I want to OEM and am testing out this controller among others with this router project and would like to know what to look and test for in the future buying other controllers.

Thanks!

The controllers actually handle the homing. So it's up to the people writing the plugin to get it to work correctly.

I don't know why they don't work with homing.
As far as probing, most dont support the GetVAR command, which is used to get the probed position.

I wouldn't recommend any chinese controllers.
And at this point in time, I wouldn't recommend Mach3 either, as it's been obsolete (imo), and unsupported, for several years now.