Index homing Heidenhain ls 403/exe602

Hi!
Is it possible to home a machine only using the scales and no other limit switches? Have found a bunch of posts regarding this, but none gave me enough clarity. In one i think Andypugh did some testing/developing to get this to work?

/Hampus 

It should be possible if there is only one index
rather than periodic index marks

My Maho homes off the Heindenhain LS-403 scale index marks. Works the same as homing to a a separate homing switch.

Nice!

I have a MH500w2 i'm working on! I looked through your files and tried messing around abit. But i'm afraid i can't figure out how to add what appears to be different. you have some layer of "home-x" parameters which i seem to skip in my ini (made with Mesa CT). i'll add my files if you have the time for a quick look.

I'm running LCNC 2.10 with Gmoccapy.

RotarySMPs hal/ini files are from LinuxCNC 2.7 or earlier so before the
AXIS/Joint separation change.

Newer hal/ini files like yours put the homing ini constants in "JOINTN"
sections

Ok! I'm really a beginner at this...

My machine homes and the dro goes green on all axis Problem is that it seems to be doing so on some kind of periodic index from the scales, so after homed it has no idea where along the scale it is at the moment... must be missing some important lines in my configs.