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XYZ endstops are all calibrated, but when I run:
g28
g0 f8000 x0 y0 z0

Z is at least 2-3mm above print bed.
While all towers are grubbing paper.

So technically adjusting Delta Radius should fix it, but



changing "#define PRINTER_RADIUS 197.40" up/down (tried 180-280) does not seem to have any effect at all.




rest of relevant values remain the default...
#define END_EFFECTOR_HORIZONTAL_OFFSET 33
#define CARRIAGE_HORIZONTAL_OFFSET 35

Also EEPROM Is disables, #define OPS_MODE 0


I tried contributing by increasing
#define X_MAX_LENGTH 366.5
#define Y_MAX_LENGTH 366.5
#define Z_MAX_LENGTH 366.5

Now Z0 (g0 f8000 x0 y0 z0) will touch the sheet of paper, but towers (G0 f8000 x-77.94 y-45 z0etc ) will collide, and if I raise endstop screws, Z will be too high again.



So I can Have nice Z0 in am middle point only, or nice Z0 in the 3 tower point, but impossible to balance all 4 points. It's a loop!!! Please help!

If you don't re-adjust all three towers after changing the PRINTER_RADIUS value, you'll NEVER see the result of the PRINTER_RADIUS change. The calibration steps are very clearly outlined in the manual.

g.

ohh wow, thanks geneb!

You're quite welcome! Good luck!

g.

The first time you realize that this is the setup procedure, which geneb describes quite well, you'll think to yourself, "WTF!?"

Eventually you'll be able to fully re-calibrate the printer in 5 minutes or less.

Good luck, and start looking forward to the day that the software will do this for you, because it's not too far around the corner

Thank you edward
I am glad that software did not do this for me, it's the best way to learn. I finally get it!