Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: djrobilliard on June 10, 2019, 04:21:39 AM

Title: Homing Slaved Axis?
Post by: djrobilliard on June 10, 2019, 04:21:39 AM

Hi guys,

I'm having a problem homing my slaved Y and A axis. Both axis are homing in the negative direction and they move together to the home position. The problem is the A axis sensor activates and the A axis backs off but, the Y axis continues moving in a negative direction once the Y sensor activates and at this point, I have to stop the machine to stop it racking further. If I check the slave homing box in the general logic config it homes properly using the Y sensor but obviously won't square the gantry.

Any help would be greatly appreciated!  :) 

Title: Re: Homing Slaved Axis?
Post by: ger21 on June 10, 2019, 07:34:19 AM

Are you using a chinese motion controller?

Title: Re: Homing Slaved Axis?
Post by: djrobilliard on June 10, 2019, 07:27:27 PM

Yes, I am. The breakout board is the '5 Axis CNC Breakout Board For Stepper Driver Controller Mach3', running through the parallel port.

Title: Re: Homing Slaved Axis?
Post by: ger21 on June 10, 2019, 08:13:27 PM

That's just a breakout board, not a motion controller.

What version of Mach3?

What's in your Homing macro?

Title: Re: Homing Slaved Axis?
Post by: djrobilliard on June 10, 2019, 08:40:28 PM

My Mach3 version is R2.63, running on Windows XP. The RefAllHome macro is:

Ref Combination (3)
DoButton (24)
DoButton (23)
DoButton (22)
DoButton (25)

Is this different from the overall homing macro?

Title: Re: Homing Slaved Axis?
Post by: ger21 on June 11, 2019, 09:17:19 AM

Change the macro to this:

DoButton (24)
Ref Combination (10)
DoButton (22)

Title: Re: Homing Slaved Axis?
Post by: djrobilliard on June 11, 2019, 05:30:00 PM

Thanks, I've changed the Refallhome macro but now the Y axis homes negative to the left and the X axis tries to home negative to the front of the machine. The A axis remains stationary and I have to stop the machine. I was wrong in my previous message the X and A axis are slaved not the Y and A. I've attached a simple diagram of what the machines doing; the red arrows indicate the movement when the Refallhome button is pressed.

Title: Re: Homing Slaved Axis?
Post by: ger21 on June 11, 2019, 06:25:48 PM

The macro doesn't change homing direction.
You can change direction with Config>Homing/Limits, and changing the Home Neg setting.

Try this one.

DoButton (24)
DoButton (23)
Ref Combination (9)

Title: Re: Homing Slaved Axis?
Post by: djrobilliard on June 11, 2019, 07:27:09 PM

Thanks Gerry, now the Y axis homes and the X and A move together to the home location. However when the X limit activates it backs off almost an inch and the A remains stationary regardless whether the A limit has been activated or not.

Title: Re: Homing Slaved Axis?
Post by: ger21 on June 11, 2019, 08:11:33 PM

Have you checked the diagnostics page and made sure the switches are working correctly?

What version of Mach3 are you using?

Title: Re: Homing Slaved Axis?
Post by: djrobilliard on June 12, 2019, 02:19:05 AM

Yes, the proximity sensors seem to be functioning as they should in the diagnostics tab and I'm running version R2.63

Title: Re: Homing Slaved Axis?
Post by: ger21 on June 12, 2019, 06:45:21 AM

Any reason for running a 10 year old version?

Try the latest version, 3.043.062.

Title: Re: Homing Slaved Axis?
Post by: djrobilliard on June 13, 2019, 06:14:44 AM

I've just installed the latest version but it's still running the same.

Title: Re: Homing Slaved Axis?
Post by: ger21 on June 13, 2019, 06:53:23 AM

Try removing the license file and running in demo mode, and see if it works.

Title: Re: Homing Slaved Axis?
Post by: djrobilliard on June 15, 2019, 01:25:18 AM

Thanks, I've just tried that, and it's still having the same issue.