Jitter on short segments by high res stl files/curves/arcs

Burzl89

Hello!

Know anyone the problem thet by short segments the printhead are jittering? It looks like the printer drives any small segment with initial jerk moves. I have no more idea :( i use marlin 4due bevore and there was no problem by interpreting arcs and move smothly. I dont want to change back and i think thers a way tu config out the problem...

I have tryd to set delta segments to 600 and segments per line to 100 etc but nothing helps.

My setup: core xy,radds, arduino due, tmc2100, hall e endstops.

Thanks for any answer

Repetier

delta segments you mean updates per second? Core XY is linear so 10 is enough, more is just making more work and things worse.

Small segments are always a problem, especially if the print buffer goes down. What would help is having a bigger buffer instead of default 16 try 32 and optimizer can optimize double range.

Burzl89

Hello! Thanks for your quick answer! Yes of curse, i set max delta segments to 600. and you say i can set this on my core xy to 10? ore lines per secound?. My buffer is set to 24 lines. Is will set this to 32? I think it is better i post my config.h...

eventually you have some improofments for me?!

#define FEATURE_BABYSTEPPING 1

#define BABYSTEP_MULTIPLICATOR 16

#define DELTA_SEGMENTS_PER_SECOND_PRINT 600 // Move accurate setting for print moves rene

#define DELTA_SEGMENTS_PER_SECOND_MOVE 600 // Less accurate setting for other moves rene

#define EXACT_DELTA_MOVES 1

// Delta settings

#define DELTA_HOME_ON_POWER 0

#define DELTASEGMENTS_PER_PRINTLINE 100

#define STEPPER_INACTIVE_TIME 360L

#define MAX_INACTIVE_TIME 0L

#define MAX_FEEDRATE_X 500

#define MAX_FEEDRATE_Y 500

#define MAX_FEEDRATE_Z 20

#define HOMING_FEEDRATE_X 80

#define HOMING_FEEDRATE_Y 80

#define HOMING_FEEDRATE_Z 12

#define HOMING_ORDER HOME_ORDER_XYZ

#define ZHOME_MIN_TEMPERATURE 0

#define ZHOME_HEAT_ALL 0

#define ZHOME_HEAT_HEIGHT 50

#define ZHOME_X_POS 60

#define ZHOME_Y_POS 155

#define ENABLE_BACKLASH_COMPENSATION 0

#define X_BACKLASH 0

#define Y_BACKLASH 0

#define Z_BACKLASH 0

#define RAMP_ACCELERATION 1

#define STEPPER_HIGH_DELAY 2

#define DIRECTION_DELAY 0

#define STEP_DOUBLER_FREQUENCY 80000

#define ALLOW_QUADSTEPPING 1

#define DOUBLE_STEP_DELAY 0 // time in microseconds

#define MAX_ACCELERATION_UNITS_PER_SQ_SECOND_X 1300

#define MAX_ACCELERATION_UNITS_PER_SQ_SECOND_Y 1300

#define MAX_ACCELERATION_UNITS_PER_SQ_SECOND_Z 100

#define MAX_TRAVEL_ACCELERATION_UNITS_PER_SQ_SECOND_X 1200

#define MAX_TRAVEL_ACCELERATION_UNITS_PER_SQ_SECOND_Y 1200

#define MAX_TRAVEL_ACCELERATION_UNITS_PER_SQ_SECOND_Z 100

#define INTERPOLATE_ACCELERATION_WITH_Z 0

#define ACCELERATION_FACTOR_TOP 100

#define MAX_JERK 15

#define MAX_ZJERK 0.3

#define PRINTLINE_CACHE_SIZE 24

#define MOVE_CACHE_LOW 10

#define LOW_TICKS_PER_MOVE 250000

#define EXTRUDER_SWITCH_XY_SPEED 100

#define DUAL_X_AXIS 0

#define FEATURE_TWO_XSTEPPER 0

#define X2_STEP_PIN ORIG_E2_STEP_PIN

#define X2_DIR_PIN ORIG_E2_DIR_PIN

#define X2_ENABLE_PIN ORIG_E2_ENABLE_PIN

#define FEATURE_TWO_YSTEPPER 0

#define Y2_STEP_PIN ORIG_E2_STEP_PIN

#define Y2_DIR_PIN ORIG_E2_DIR_PIN

#define Y2_ENABLE_PIN ORIG_E2_ENABLE_PIN

#define FEATURE_TWO_ZSTEPPER 1

#define Z2_STEP_PIN ORIG_E1_STEP_PIN

#define Z2_DIR_PIN ORIG_E1_DIR_PIN

#define Z2_ENABLE_PIN ORIG_E1_ENABLE_PIN

#define FEATURE_THREE_ZSTEPPER 1

#define Z3_STEP_PIN ORIG_E2_STEP_PIN

#define Z3_DIR_PIN ORIG_E2_DIR_PIN

#define Z3_ENABLE_PIN ORIG_E2_ENABLE_PIN

#define FEATURE_DITTO_PRINTING 0

#define USE_ADVANCE 1

#define ENABLE_QUADRATIC_ADVANCE 1

Burzl89

sorry i mean #DELTASEGMENTS_PER_PRINTLINE not per second

Repetier

#define DELTA_SEGMENTS_PER_SECOND_PRINT 10 // Move accurate setting for print moves rene

#define DELTA_SEGMENTS_PER_SECOND_MOVE 10 // Less accurate setting for other moves rene

#define PRINTLINE_CACHE_SIZE 32

#define DELTASEGMENTS_PER_PRINTLINE 30

is what I'd use on corexy with fast version.

Burzl89

thank you verry verry much :) i try out these settings and giva a feedback!

Burzl89

awesome! its magic :P no jitter occurs more.... Great service! tank´s one more!!