Auto_Bed_Leveling: Enhanced G29 command

[Roxy]

Hi Roxy, would it be possible to do something like they do with the Repetier firmware?

Yes, that should be possible. The logic should map over. But I don't think very many people are using Repetier. Is that assumption not correct?

With normal PLA I have no problems but I can't get Lay-wood to stick on my mirror build plate so I'm using a acrylic plate on top of it which seems to stick much better.
However this plate has a few bumps and cracks but nothing worth compensating for. But after doing the G29 I get a very messy first layer because of the uneven spots.
I would like the auto calibration to only pick 3 points (delta printer) and only compensate for that, do you think this is possible with Marlin?

Well... I'm not sure if I followed everything, but it sounds like that acrylic plate is not very flat. Is that what you mean by 'uneven spots' ? As far as only doing 3 spots on a Delta printer, that should be just a matter of turning on the right options and setting where the 3 measurements will be taken on the bed. I would encourage you to do more than 3 spots, but if your bed is pretty flat and level, you may get good results with that.