Big Problems with Correction Map G33 on Delta Printer with 100mm Radius Bed

4ndi

Hi all :)

First of all sorry for my very bad English ;)

I had a Delta Printer with a 100 radius Bed. G32 does not work very well for me because the bed is not 100% flat.
So i wanted to switch to g33 (DISTORTION_CORRECTION)

BUT !

If i start G33 the Print Head always run out of Bed on Top Left Corner :( and i had to Emergency Stop them to get no Damage.

the Parameters in Firmware are

#define DISTORTION_CORRECTION 1

#define DISTORTION_CORRECTION_POINTS 8

#define DISTORTION_LIMIT_TO 2

#define DISTORTION_CORRECTION_R 95

#define DISTORTION_PERMANENT 1

#define DISTORTION_UPDATE_FREQUENCY 15

#define DISTORTION_START_DEGRADE 0.5

#define DISTORTION_END_HEIGHT 1

#define DISTORTION_EXTRAPOLATE_CORNERS 0

#define DISTORTION_XMIN -60

#define DISTORTION_YMIN -60

#define DISTORTION_XMAX 60

#define DISTORTION_YMAX 60

Firmware Version are lastest Stable 1.0............

I Dont know why. plz help me ! :)

Board is Arduino Due 32 Bit

4ndi

falls mir jemand antworten möchte auch gerne in deutsch :)

4ndi

nobody has an idea?

Repetier

For deltas
#define DISTORTION_EXTRAPOLATE_CORNERS 1
is always a good thing to increase the testable area. Always think that extruder with applied z offset needs to reach the positions. In this case a lower DISTORTION_CORRECTION_POINTS is normally helpful. 5 is a good value.
Reduce DISTORTION_CORRECTION_R if it still does not fit!

Also always run G33 AFTER G32 and not alone. You still want to correct bed tilt in addition to bumps.

4ndi

ist there any way to got a list of the coordinates without driving the effektor ?
thanks for your answer i will test that
now i use

#define DISTORTION_CORRECTION 1

#define DISTORTION_CORRECTION_POINTS 5

#define DISTORTION_LIMIT_TO 2

#define DISTORTION_CORRECTION_R 90

#define DISTORTION_PERMANENT 1

#define DISTORTION_UPDATE_FREQUENCY 15

#define DISTORTION_START_DEGRADE 0.5

#define DISTORTION_END_HEIGHT 1

#define DISTORTION_EXTRAPOLATE_CORNERS 1

#define DISTORTION_XMIN -60

#define DISTORTION_YMIN -60

#define DISTORTION_XMAX 60

#define DISTORTION_YMAX 60

4ndi

it works :)

#define DISTORTION_CORRECTION_R 80 works fine !!!!

thx !