Core XY Marlin 2, dual Z motors auto align

[@BuzzingGoober]

Why is num z stepper drives missing in the latest Marlin?

[@SteliosLiver]

Greetings BuzzingGoober, The number of z stepper, is now (ver2.1.x) defined directly in Configuration.h , by enabling more than one Z_DRIVER_TYPE (which makes more sense) for example: #define Z_DRIVER_TYPE A4988 #define Z2_DRIVER_TYPE A4988 //#define Z3_DRIVER_TYPE A4988 //#define Z4_DRIVER_TYPE A4988 so the ----#define-- NUM_Z_STEPPER_DRIVERS 2-- in Configuration_adv.h is obsolete...

[@SteliosLiver]

So in other words is missing, but is not missed... :-)

[@BuzzingGoober]

@@SteliosLiver thanks. I assumed that was the case. For some reason, however, I'm cannot get auto align working with my 2 drivers. It always probes 3 points on the bed, not matter what settings I pick. It probes the middle, middle left, and bottom slightly to left. I just want it probing right and left like the example under marlin shows for 2 drivers. I enabled auto align, enabled auto align and put in 2 sets of coords, and enabled auto align and picked the # for the probing spots (forgot what called), and every time it does the same thing. Do you have any idea what's wrong?

[@SteliosLiver]

@@BuzzingGoober at Configuration_adv.h you will chose #define Z_STEPPERS_ORIENTATION 0 (or 1) and if you need a custom probing pattern, you will specify the xy position of the probing: #define Z_STEPPER_ALIGN_XY { { 10, 150}, { 300, 150} } I have the above commented in my firmware, as I use the probe limits. The Z_STEPPER_AUTO_ALIGN for 2 steppers, only needs a 2 point probing **between 2 two steppers** (and if you count the safe homing in the middle of the bed, then 3 points). The 9 point probing in my video, is used to generate a mesh point for the AUTO_BED_LEVELING_BILINEAR not the Z_STEPPER_AUTO_ALIGN

[@BuzzingGoober]

@@SteliosLiver thanks I'll try it out

[@andresqv3quezada]

Hi. I have a skr mini e3 v2 and I have the next error. #error "No E stepper plug left for z2!" Do you know if this board is compatible?

[@SteliosLiver]

Greetings Andrés Quezada Venegas, Did you counted 5 stepper drivers before you proceed? For independent control of the second z stepper you need a fifth driver... And the skr mini e3 v2 has only four of them. one for x one for y one for z (with two steppers in series, or parallel connection) one for the extruder You can not implement auto z align with 4 stepper drivers

[@SteliosLiver]

#define G34_MAX_GRADE *1* = 1% of ([bed size] - [probe offset]) = 1% of (330mm - 34mm) = 296 * 0,01 = *2,96mm max deviation* The default 5% for a 330 bed with 296mm width between the two measurments, gives 14,8mm = 1,48cm max deviation (paranoia)

[@SteliosLiver]

Send:15:40:19.416: N11 G34 Recv:15:40:49.706: echo:busy: processing (14) Recv:15:40:51.053: ITERATION: 1 Recv:15:41:09.418: echo:busy: processing (9) Recv:15:41:10.417: DIFFERENCE Z1-Z2=0.09 Recv:15:41:10.570: ITERATION: 2 Recv:15:41:27.874: echo:busy: processing (9) Recv:15:41:29.238: DIFFERENCE Z1-Z2=0.09 Recv:15:41:29.391: ITERATION: 3 Recv:15:41:46.479: echo:busy: processing (9) Recv:15:41:47.761: DIFFERENCE Z1-Z2=0.20 Recv:15:41:47.761: Decreasing accuracy detected. Recv:15:41:47.943: ITERATION: 4 Recv:15:42:05.352: echo:busy: processing (9) Recv:15:42:06.715: DIFFERENCE Z1-Z2=0.01 Recv:15:42:06.715: Target accuracy achieved. Recv:15:42:06.715: Did 4 of 5 Recv:15:42:06.715: Accuracy: 0.01 Recv:15:42:27.547: echo:busy: processing (9) Recv:15:42:28.928: ok