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Homebrew engraver to 3D printer Mod

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S. Heslop:
That's pretty awesome!

BillTodd:
Help!  :nrocks:

I've just add a 3dtouch probe to the 3d printer . Probe works OK I've managed to configure it and calibrate offsets etc. BUT...

It is NOT probing the mesh correctly: (AUTO_BED_LEVELING_BILINEAR)

ATM - I hit bed level , it homes (to X-60, Y+120 , Z189  - Zero is centre of bed) , Zs down to probe but instead of moving to the  expected Mesh I0J0 (which is X-59, Y125)  it drops to the XY home ,probes 3 time across (X) but then moves the Y further forward into the stops.

If I move using a G42 I0 J0 (move to mesh 0,0) it moves to all the mesh points correctly as expected

It seems to be screwing up the initial mesh move ????


Ideas welcome..

Bill

BillTodd:
 arrrgggh... thought id fixed it, but...


Sticking a G42 i0j0 before the G29 gets it to probe the mesh correctly but now it thinks the first layer is 5mm in the air !!!

 

tom osselton:
Isn’t there a offset parameter  to take care of that?

BillTodd:
vety likely, but where?    :D

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