When i home my laser it changes the Z setting. Is there a way to home without changing the z setting?
Is this machine you’re referring to the Fox Alien in your profile? If so, then answer is likely no as this is firmware dependent. If your machine runs a more modern variant of GRBL then it’s possible. However, if it’s running a traditional version of GRBL Z-axis homing is compiled into the kernel at build time.
In the latter case you would either need to flash with a firmware that doesn’t have that compiled in or trigger the Z-axis switch manually.
Let’s at least confirm if your firmware is capable of doing this. Can you run these commands in Console and return output?
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Only way I’ve found to do this on my machine is to send discreet axis home command via console or custom macro.
$HX homes X
$HY homes Y
$HZ homes Z
$H homes all
Like @berainlb said, Zaxis Homing is an integral part of the homing cycle. You will notice it will complete homing the Zaxis before the Xaxis and Yaxis are allowed to move. Z always homes upwards for safety. This is standard CNC operation since back when they were called NC machines.
I know what you are asking. You want the Zaxis to stay put at the focus point. My Mill/Laser solution was to record the Zposition for focus, then Home the machine. Then I would command G01 Z(recorded position) F500 in the Console window. You could Macro this too. Until I changed work materials, the recorded Zposition was good.
I later learned to record the setting for different materials.
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