[Zygoat]

i have mach3 and its working great. i just got my home and limit switches all set up and everything works as it should. however i have a special requirement.

i need the z axis to move to its midpoint BEFORE the y axis references its home position.

so gurus of mach3 what is the best way to accomplish this?

[ger21]

Change your homing script to this. This will move down 2" before the Y homes. Edit the "2" to the correct value you need.

DoButton(24)
Code "G53 G0 Z-2"
While IsMoving()
Wend
DoButton(23)
DoButton(22)

[WoodSpinner]

ger21, dont you need this too?


DoButton(24)
While IsMoving()
Wend
Code "G53 G0 Z-2"
While IsMoving()
Wend
DoButton(23)
DoButton(22)

John
ps and how would you get x&y to home at same time?

[ger21]

No, not when homing. The default homing scripts don't use it.

RefCombination(3) will home X and Y together.

[Zygoat]

i had some time to play with this, i ended up having to use woodspinner's code. gerry's resulted in the z moving down 2 inches BEFORE it referenced home.

this now works perfectly, thank you both for your help so far.


now i have another issue. when homing the x axis i get an error saying a limit has been tripped. i have the x axis home and limit switch as the same physical switch.

i have tried

changing the order which the axes home: no effect

i disabled the switch as a limit: this homes correctly, but of course i then have no limit switch.

any idea on how to fix this?

[ger21]

It's probably noise or switch bounce triggering the limit immediately after homing.

gerry's resulted in the z moving down 2 inches BEFORE it referenced home.

It shouldn't, because it's exactly how I have mine setup?

[Zygoat]

It's probably noise or switch bounce triggering the limit immediately after homing.

i can watch the read out in the diagnostics and it works as it should.

in either case, what would i do about it?

[ger21]

You can try adding a small capacitor to the input, or try a different switch. I use the electronic home switches and they work great, no problems at all.