Mach3 slave axis not homing

[regpye]

I am trying to work out how to setup mine.
But still waiting for stuff to arrive, and wanted to get on top of things before arrival.

I am going to use a stand alone THC and wont need Mach3 to control the Z as it wont be there (as far as Mach3 is concerned)
I also want to slave A to Y and have auto squaring of the axis while homing, so I need to be able to work out how to program Mach3 to home just the X, Y and A
The control board will be a USB Mach3 5 axis with separate stepper drivers. The THC lifter has it's own DC motor and is self controlling.

If I leave out DoButton( 24 ) ' this homes the Z

DoButton( 22) ' this homes the X
RefCombination( 10 ) ' this will home the Y and A at the same time.

Not sure if this is right, someone please put me straight. Thanks.

[dazp1976]

The control board will be a USB Mach3 5 axis with separate stepper drivers. The THC lifter has it's own DC motor and is self controlling.

Have you bought anything yet?
One thing I'll say is I would steer clear of usb controllers. Use a basic parallel one or go ethernet.
Usb can be an arse with noise issues. I've seen plenty of folk have problems.

Why do you think parallel was there for years, then usb started coming out and almost immediately 'proper' manufacturers were ditching it for ethernet.
Hmmmmm....

[regpye]

dazp1976 thanks for the reply.
Unfortunately I have already bought a USB board, still waiting for it to arrive.
I have however got a 3 axis parallel board that I bought some years ago and never used it.
Being as I only want to use X, Y and A axis, maybe I can use it and make the boards Z be the A?? Not sure how to do that.
Also not sure how to relate that to the settings in Mach3 as well.

[JAZZCNC]

I am trying to work out how to setup mine.
But still waiting for stuff to arrive, and wanted to get on top of things before arrival.

I am going to use a stand alone THC and wont need Mach3 to control the Z as it wont be there (as far as Mach3 is concerned)
I also want to slave A to Y and have auto squaring of the axis while homing, so I need to be able to work out how to program Mach3 to home just the X, Y and A
The control board will be a USB Mach3 5 axis with separate stepper drivers. The THC lifter has it's own DC motor and is self controlling.

If I leave out DoButton( 24 ) ' this homes the Z

DoButton( 22) ' this homes the X
RefCombination( 10 ) ' this will home the Y and A at the same time.

Not sure if this is right, someone please put me straight. Thanks.

Because you are going to use an external motion controller then HOMING could work slightly differently from how Mach3 usually does it. This is because often the Homing duties are passed over to the external device and dealt with by the plug-in the controller uses.

However, most external controllers tend to follow Mach3's standard way of HOMING in which case you don't need to use RefCombination (10) because when slaving Mach3 treats the slave as the same Axis as the master so in your case you just home Y with DoButton (23) and Mach3 will decouple the motors when Homing and recouple them after the switches get tripped.

Also, as DaZp says USB is terrible with noise, and for a plasma, I can't think of anything worse to use so get ready for random trips, etc. Your grounding and wiring will need to be top-notch to avoid USB from dropping out.

[julius pakstys]

Hi. Did anybody solve the auto square problem when homing?

[Clive S]

Hi. Did anybody solve the auto square problem when homing?

You need to give more info. ie. what are you using with Mach3 what bob are you using etc