Hello Guest it is February 27, 2021, 05:28:07 PM

Author Topic: Homing Slaved Axis?  (Read 814 times)

0 Members and 1 Guest are viewing this topic.

Homing Slaved Axis?
« 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!  :) 

Offline ger21

*
  • *
  •  6,289 6,289
    • View Profile
    • The CNC Woodworker
Re: Homing Slaved Axis?
« Reply #1 on: June 10, 2019, 07:34:19 AM »
Are you using a chinese motion controller?
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Homing Slaved Axis?
« Reply #2 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.

Offline ger21

*
  • *
  •  6,289 6,289
    • View Profile
    • The CNC Woodworker
Re: Homing Slaved Axis?
« Reply #3 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?
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Homing Slaved Axis?
« Reply #4 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?

Offline ger21

*
  • *
  •  6,289 6,289
    • View Profile
    • The CNC Woodworker
Re: Homing Slaved Axis?
« Reply #5 on: June 11, 2019, 09:17:19 AM »
Change the macro to this:

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

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Homing Slaved Axis?
« Reply #6 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.

Offline ger21

*
  • *
  •  6,289 6,289
    • View Profile
    • The CNC Woodworker
Re: Homing Slaved Axis?
« Reply #7 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)
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Homing Slaved Axis?
« Reply #8 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.

Offline ger21

*
  • *
  •  6,289 6,289
    • View Profile
    • The CNC Woodworker
Re: Homing Slaved Axis?
« Reply #9 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?
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html