V5 MP3DP Y Axis Moves when moving X axis

Mostly Printed 3D Printer - MP3DP Troubleshooting
1

Ive built a V5 , great fun thanks to all who help design it, but ive obviously either built something poorly or calibrated it badly. After homing the axis, when I move the bed just down the X axis, the Y axis moves slightly.

video showing issue

picture of build

in the video it moves one way then back again, so this couldn’t be rotational distance could it ?

using 20 cog / 2 mm belt

# Motor1
[stepper_x]
step_pin: PE6
dir_pin: PE5
enable_pin: !PC14
microsteps: 16
rotation_distance: 40
endstop_pin: ^PF4
position_endstop: 0
position_min: 0
position_max: 300
homing_speed: 75
homing_retract_dist: 5
second_homing_speed: 3

# Motor2
[stepper_y]
step_pin: PE2
dir_pin: PE1
enable_pin: !PE4
microsteps: 16
rotation_distance: 40
endstop_pin: ^PF3
position_endstop: 300
position_min: 0
position_max: 300
homing_speed: 75
homing_retract_dist: 5
second_homing_speed: 3

any pointers gratefully received.

dom

1 Like
2

are your x-y gantry bolts loose? It could be that your gantry is racking as it is attempting to move.

Screenshot_20240918-085845
Screenshot_20240918-0858451080×2400 186 KB

3

If you have Y movement when attempting to move only X, then one of your motors is moving further than the other.

Are you sure you have 20T pulleys on both motors?

It might be best if you post your full config file . Just copy and paste everything and enclose it in this tag

```
so it is formatted correctly

4

I did wonder about that, but both have 20 tooth on them the Z axis have 16.

# See docs/Config_Reference.md for a description of parameters.

[include mainsail.cfg]

# Motor1
[stepper_x]
step_pin: PE6
dir_pin: PE5
enable_pin: !PC14
microsteps: 16
rotation_distance: 40
endstop_pin: ^PF4
position_endstop: 0
position_min: 0
position_max: 300
homing_speed: 75
homing_retract_dist: 5
second_homing_speed: 3

# Motor2
[stepper_y]
step_pin: PE2
dir_pin: PE1
enable_pin: !PE4
microsteps: 16
rotation_distance: 40
endstop_pin: ^PF3
position_endstop: 300
position_min: 0
position_max: 300
homing_speed: 75
homing_retract_dist: 5
second_homing_speed: 3

# Motor3
[stepper_z]
step_pin: PB8
dir_pin: !PB7
enable_pin: !PE0
microsteps: 16
rotation_distance: 32
endstop_pin: probe:z_virtual_endstop
position_min: -5
position_max: 298
homing_speed: 25
second_homing_speed: 3
homing_retract_dist: 5

## Motor4
[stepper_z1]
step_pin: PB4
dir_pin: PB3
enable_pin: !PB6
microsteps: 16
rotation_distance: 32
endstop_pin: probe:z_virtual_endstop


# Motor5
[stepper_z2]
step_pin: PG13
dir_pin: PG12
enable_pin: !PG15
microsteps: 16
rotation_distance: 32
endstop_pin: probe:z_virtual_endstop


## Motor6
[extruder]
step_pin: PG9
dir_pin: PD7
enable_pin: !PG11 
heater_pin: PA1 # HE1 
sensor_pin: PC5 # T1
microsteps: 16
rotation_distance: 3.5
nozzle_diameter: 0.4
filament_diameter: 1.75
heater_pin: PA0 # HE0
sensor_pin: PB0 # T0
sensor_type: EPCOS 100K B57560G104F
#control: pid
#pid_Kp: 22.2
#pid_Ki: 1.08
#pid_Kd: 114
min_temp: 0
max_temp: 250
max_extrude_only_distance: 150.0



[heater_bed]
heater_pin: PF5
sensor_pin: PB1 # TB 
sensor_type: Generic 3950
min_temp: 00
max_temp: 130
max_power: 1


# Fan0
[heater_fan fan]
pin: PF7

## Fan1
[fan]
pin: PF9
max_power: 0.4


[mcu]
serial: /dev/serial/by-id/usb-Klipper_stm32h723xx_1B0016000851313339373836-if00

[printer]
kinematics: corexy
max_velocity: 300
max_accel: 7000
max_z_velocity: 50
max_z_accel: 500

[gcode_arcs]
resolution: 1

########################################
# TMC2209 configuration
########################################

## Motor1
[tmc2209 stepper_x]
uart_pin: PC13
#diag_pin: PF4
interpolate: False
run_current: 1
stealthchop_threshold: 999999

## Motor2
[tmc2209 stepper_y]
uart_pin: PE3
#diag_pin: PF3
run_current: 1
interpolate: False
stealthchop_threshold: 999999

## Motor3
[tmc2209 stepper_z]
uart_pin: PB9
#diag_pin: PF2
run_current: 0.800
stealthchop_threshold: 999999

## Motor4
[tmc2209 stepper_z1]
uart_pin: PB5
#diag_pin: PF1
run_current: 0.800
stealthchop_threshold: 999999

# Motor5
[tmc2209 stepper_z2]
uart_pin: PG14
run_current: 0.800
stealthchop_threshold: 999999

## Motor6
[tmc2209 extruder]
uart_pin: PG10
run_current: 0.800
stealthchop_threshold: 999999



[board_pins]
aliases:
    # EXP1 header
    EXP1_1=PE7, EXP1_2=PG1,
    EXP1_3=PG0, EXP1_4=PF15,
    EXP1_5=PF14, EXP1_6=PF13,    # Slot in the socket on this side
    EXP1_7=PF12, EXP1_8=PF11,
    EXP1_9=<GND>, EXP1_10=<5V>,

    # EXP2 header
    EXP2_1=PE13, EXP2_2=PE12,
    EXP2_3=PE15, EXP2_4=PE11,
    EXP2_5=PE10, EXP2_6=PE14,      # Slot in the socket on this side
    EXP2_7=PE8, EXP2_8=<RST>,
    EXP2_9=<GND>, EXP2_10=<NC>

# See the sample-lcd.cfg file for definitions of common LCD displays.

[temperature_sensor Manta_M8P_temp]
sensor_type: temperature_mcu
min_temp: 0
max_temp: 100

[temperature_sensor RaspberryPi]
sensor_type: temperature_host
min_temp: 0
max_temp: 100

[adxl345]
cs_pin: PA15
spi_software_sclk_pin: PC10
spi_software_mosi_pin: PC12
spi_software_miso_pin: PC11
spi_speed: 5000000
rate: 3200
axes_map:x,-y,-z

[resonance_tester]
accel_chip: adxl345
probe_points: 150, 150, 20 # an example

[output_pin probe_enable] 
pin: PD12
value: 0

[gcode_macro Probe_Deploy] 
gcode:
      SET_PIN PIN=probe_enable VALUE=1
      
[gcode_macro Probe_Stow] 
gcode:
      SET_PIN PIN=probe_enable VALUE=0
      
[probe]
pin: ^!PD13 #For V1 version, set to ^PD13 for high-level trigger; for V2 version, set to ^!PD13 for low-level trigger. 
deactivate_on_each_sample: False
x_offset: 7.0 
y_offset: -25.0 
z_offset: 0.95
speed: 5.0 
activate_gcode:
  Probe_Deploy
  G4 P500 # Allow 500 milliseconds for the probe to deploy 
deactivate_gcode:
  Probe_Stow
  

[homing_override]
gcode:
    G90                         ; Use absolute positioning
    G28 X Y                     ; Home X and Y axes first
    G0 X150 Y150                ; Move to the center of the bed
    G28 Z                       ; Home Z axis (this should move the bed up towards Z0)
    G1 Z20                      ; Move bed down slightly to avoid collision
    Z_TILT_ADJUST               ; Perform bed tilt calibration
    G0 X150 Y150                ; Move to the center of the bed
    G28 Z
    BED_MESH_PROFILE LOAD="default"
axes: z
set_position_z: 0


[z_tilt]
#z_positions:
#    0,0
#   150,300
#    300,0
z_positions:
            -21, 37.5             
             152, 355  
             345, 37.5
points:
    25,25
    150,275
    275,25
speed: 150         # Speed of movement during tilt calibration
horizontal_move_z: 5  # Safe move height above the bed
retry_tolerance: 0.01
retries: 6




[output_pin power_detect]
# Pull the pin initially high after starting Klipper
pin: PD14
value: 1
shutdown_value: 0

[gcode_macro POWER_ON]
description: Turn on the printer via the relay
gcode: 
    SET_PIN PIN=power_detect VALUE=1

[gcode_macro POWER_OFF]
description: Turn off the printer via the relay
gcode:
    { action_respond_info('Shutting down now') }
    SET_PIN PIN=power_detect VALUE=0

[gcode_macro DO_SHUTDOWN]
description: Turn off all heaters and cut power once below 60C
gcode:
   TURN_OFF_HEATERS
   TEMPERATURE_WAIT SENSOR=extruder MAXIMUM=60
   POWER_OFF


[filament_switch_sensor filament_switch_sensor]
switch_pin: ^PF0
pause_on_runout: false
runout_gcode: PAUSE

[filament_motion_sensor filament_motion_sensor]
switch_pin: ^PC15
detection_length: 7
extruder: extruder
pause_on_runout: false
runout_gcode: PAUSE

[delayed_gcode DISABLEFILAMENTSENSOR]
initial_duration: 1
gcode:
    SET_FILAMENT_SENSOR SENSOR=filament_motion_sensor ENABLE=0

[bed_mesh]
speed: 125
horizontal_move_z: 5
mesh_min:   25, 25
mesh_max: 275,275
probe_count: 5, 5
algorithm: bicubic
bicubic_tension: 0.2
fade_start: 1
fade_end: 10
fade_target: 0


[gcode_macro PRINT_START]
gcode:
     G28
     
[gcode_macro PRINT_END]
gcode:
    TURN_OFF_HEATERS
    G0 Z298
    DO_SHUTDOWN
    

#*# <---------------------- SAVE_CONFIG ---------------------->
#*# DO NOT EDIT THIS BLOCK OR BELOW. The contents are auto-generated.
#*#
#*# [input_shaper]
#*# shaper_type_x = ei
#*# shaper_freq_x = 43.0
#*# shaper_type_y = 2hump_ei
#*# shaper_freq_y = 43.2
#*#
#*# [extruder]
#*# control = pid
#*# pid_kp = 15.199
#*# pid_ki = 0.396
#*# pid_kd = 145.912
#*#
#*# [heater_bed]
#*# control = pid
#*# pid_kp = 55.056
#*# pid_ki = 1.375
#*# pid_kd = 551.246
#*#
#*# [probe]
#*#
#*# [bed_mesh default]
#*# version = 1
#*# points =
#*# 	-0.250000, -0.070000, -0.020000, -0.060000, -0.240000
#*# 	-0.260000, -0.010000, -0.000000, -0.070000, -0.210000
#*# 	-0.250000, -0.110000, -0.050000, -0.130000, -0.380000
#*# 	-0.370000, -0.160000, -0.140000, -0.230000, -0.520000
#*# 	-0.440000, -0.290000, -0.260000, -0.360000, -0.670000
#*# x_count = 5
#*# y_count = 5
#*# mesh_x_pps = 2
#*# mesh_y_pps = 2
#*# algo = bicubic
#*# tension = 0.2
#*# min_x = 25.0
#*# max_x = 275.0
#*# min_y = 25.0
#*# max_y = 275.0
5

oh yes, I had loosened them to make sure they didn’t pull the bottom gantry plate up, I had discovered that it was slightly point up when I took things apart to look for alignment errors. I’ll put them back.

6

You may try swapping the X and Y drivers to see if the behavior is identical.

I have seen reports before that people have had board/driver problems that caused it.

Try swapping drivers around between X and Y, or if you have some spares to plug in.

Also, if that doesn’t work, you may also try using a different set of motor ports.

You also want to make sure that everything is tight enough and that none of the belts/pulleys could be slipping.

1 Like
7

thanks M for this,

Gave it all a try has some spare drivers and ports. Also swapped to 16T encase it was a clearance issue. Still makes this slight movement.

…

8

20T is fine. I am running 20T on mine with no issues.

…

I’m not sure what else to tell you to try as I am somewhat new to all of this.

Things I would check if my machine were behaving this way:

  • Is your frame still square? Is your X Rail still square to your Y Rail?
  • Are your Y Rails still square corner to corner?
  • Are all of you pulleys free to move easily? no binding?
  • Belt Tension set evenly on both sides? Including setting them little by on each side?
  • Are your belt lengths pretty equal?
  • Drive pulleys attached properly? No ability to spin? Grub screws tight?
  • Are the screws attaching all of the corner aluminum brackets still tight? I’ve had mine get loose on me once before…

… not sure what else, but if none that is it… I’ll have to think on it a bit more

9

I would check belt tension, make sure they are equal, or at least close to it, then check that the motor engagement with the belt is good.

Unequal belt tension shouldncause other problems, like skewing the gantry, but it’s worth a look.

Motor engagement can do some.weird things. I had a printer go off square at the high side of Y because one Y belt had some funny engagement with the motor pulley. (2 Y motors on that printer.) It resulted in one belt skipping a tooth now and then.

One other thing could be missed stepps on one motor if that motor is somehow being run at low current. If that’s the case, it would get worse with faster movement.

10

I bought a bad batch of belts and had to swap all my belts out to get it to work. Belts would ride up, they would hop a little, they wouldn’t seat in the endstops properly, they would slide… I think even stretched so didn’t mesh with the gearing correctly. It looked like the right stuff but was not.

11

After taking half the machine apart to check squareness etc, I moved to a 9mm belt I had from another project and it solved it and the axis doesn’t move all now ( thank you!)

I have managed to introduce vibrations when the axis move in a diagonal direction , but I’m assuming this is due to me rebuilding the machine so ive probably got some alignment issues.

Can vibrations come from belts rubbing on the pully edges ?

thanks too all the suggestions was a good list to follow.

Check pulleys for wobbling: Ensure pulleys are not misaligned or off-centre. Look for any wobbling while the X-axis moves.
Inspect bearings: Verify that bearings are correctly seated and not causing friction due to misalignment or pressure.
Tighten bolts evenly: Ensure all bolts are tightened evenly to avoid skewing or twisting the components, especially the idlers.
Examine belts: Make sure the belts are properly tensioned and not rubbing against the frame or shifting from side to side.
Check for frame alignment: Verify that the printer’s frame is square and all parts are aligned, as misalignment can cause movement issues across axes.
Review motor and driver configuration: Ensure that motor currents are set correctly in the firmware, and there is no interference between the motors.
Verify board connections: Check that the motor connections on the control board are properly seated and securely connected.
Inspect driver functionality: Confirm that all stepper drivers are functioning correctly and are seated properly in their ports. Replace or reconfigure any faulty drivers if needed.

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