I stand corrected by undocumented features. 

Gotta love those undocumented features.

Yes indeed, #99802=0 does zero the Z axis DRO. Works for #9980n for n=0 - 5.
In addition, #99800=#99802 transfers the Z axis value into the X axis DRO. Full Read and Write.

And #5211 - #5216 are the G52/G92 offsets: touch them at your peril.

Thank you Stirling.

Cheers
Roger

stirling,

Do you have a listing of other  undocumented variables?

RICH

Yes please!
Roger

stirling,

Do you have a listing of other  undocumented variables?

RICH

Anyone else see the irony in that question

Well, yes, but that's one of the joys of Mach3!
Cheers
Roger

Do you have a listing of other  undocumented variables?

Working on a list............lots of info available.


RICH

stirling,

Do you have a listing of other  undocumented variables?

RICH

Not really - just what I've said about OEM DROs and 15001 - 15255 are linked (to a certain extent) with User Dros 1001 - 1255.

But as you've said above - lots of info available. There's lots of posts here that cover most of it that a few searches reveal.