Homing isn't always required

My machine is using linear encoders for position feedback.  These encoders know whether or not they have been homed.  The home position of each access is only lost if the machine is unplugged.  How can I configure to skip homing when the axis is already homed?  Is this doable in the INI or HAL files?  Can it be done in the encoder device driver?

Chris

See "HOME_ABSOLUTE_ENCODER" in the INI config docs:

linuxcnc.org/docs/stable/html/config/ini...t__lt_num_gt_section

My encoders aren't actually absolute.  I still need to home them when first powered.  What I want to avoid is homing every time I start linuxcnc.
 

My lathe is very similar. (it isn't actually absolute but the resolvers are single-turn absolute, so with a normal shutdown position.txt is enough to make them absolute, most of the time).

You can have multiple INI files in a single config folder sharing HAL files. So I have two configs. One (default) assumes the abs encoders are right. The other homes conventionally to swiches when I notice that it's gone wrong.

Multiple INI files sounds like what I need to do. From the source code it looks like I need to set the joint homed flag. There isn't currently a way to do that.

You mean that you want to set things as homed without pressing the home button?

On my lathe I just put up with pressing the button. Nothing moves, it just immediately marks all joints homed.