Z correction not working

dec

I'm still setting up my delta printer. Auto bed levelling works (G32 S2) but when I trie do use Z correction the following happens:

Error:Bpos x square
Warning:Invalid delta coordinate - move ignored x:-8798 y:8796 z:902
Warning:in queueDeltaMove to calculateDeltaSubSegments returns error.
Warning:moveToReal / queueDeltaMove returns error

Repetier

Please check your eeprom. Some important variables are not correctly initalized there if you get such coordinates.

dec

Can you give me a hint what I should do? I check the EEPROM values, they seem to be ok. The printer is working, I've printed some test parts.

Repetier

If you are talking about G29 z correction, these are not in eeprom. What I see in eeprom is all ok, especially z- values for probing. For G29 you need to check

/* DISTORTION_CORRECTION compensates the distortion caused by mechanical imprecisions of nonlinear (i.e. DELTA) printers

 * assumes that the floor is plain (i.e. glass plate)

 *     and that it is perpendicular to the towers

 *     and that the (0,0) is in center

 * requires z-probe

 * G29 measures the Z offset in matrix NxN points (due to nature of the delta printer, the corners are extrapolated instead of measured)

 * and compensate the distortion

 * more points means better compensation, but consumes more memory and takes more time

 * DISTORTION_CORRECTION_R is the distance of last row or collumn from center

 */

#define DISTORTION_CORRECTION         0

#define DISTORTION_CORRECTION_POINTS  5

#define DISTORTION_CORRECTION_R       80

Most critical is the radius as it goes over a square with this radius and that must lie inside printable area.

dec

There you go!

DISTORTION_CORRECTION_R was set to a higher value than the maximum printer radius.