Wrong position after homing axes
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Homing the individual axes separately works without issues. But wenn I execute HomeAll or start a print, the printhead moves in the Y axis about 20mm with the motors giving of a strange noise (unlike the smooth movements wit all other actions) , and den moves to X50 and Y0 and sets this as Home Position X0 Y0.
What is this additional movement after homing and how can I set Home Position to be at real X0 Y0?
My printer is Ultimaker Original, and my config.g looks like this:
; General preferences
M111 S1 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M555 P2 ; Set firmware compatibility to look like Marlin
M564 H0
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X180 Y180 Z205 S0 ; Set axis maxima
M669 K0; Endstops
M574 X1 Y1 Z1 S0 ; Define active low and unused microswitches
M558 P1 ;X1 Y0 Z1 H5 F120 T5000 Set Z probe type to unmodulated, the axes for which it is used and the probe + travel speeds
G31 P500 X0 Y0 Z0.35 Set Z probe trigger value, offset and trigger height
M557 X15:150 Y15:150 S20 ; Define mesh grid; Drives
M569 P0 S0 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S0 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M350 X32 Y32 Z8 E16 I0 ; Configure microstepping without interpolation
M92 X157.4804 Y157.4804 Z533.3333 E832 ; Set steps per mm
M566 X1200 Y1200 Z480 E120 ; Set maximum instantaneous speed changes (mm/min)
M203 X8100 Y8100 Z300 E1200 ; Set maximum speeds (mm/min)
M201 X2500 Y2500 Z100 E250 ; Set accelerations (mm/s^2)
M906 X1200 Y1200 Z1100 E1100 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout; Heaters
M143 S290; Set maximum heater temperature to 310C
M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
;M305 P1 R4700 T100000 B4388
M305 P1 X200; Tools
M563 P0 D0 H1 ; Define tool 0
G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C -
post your home[xyz] and all scripts.
also
M350 X32 Y32 Z8 E16 I0 ; Configure microstepping without interpolation
if you go to x16 with interpolation you will have quieter movement normaly.
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This does not help. As I've already said, it is working correctly while printing, homing etc. The strange movement seems to come from the firmware. When i switch M350 X31 to M350 X16, it behave the same except, the x position is more off after homing that before.
homeall (all these steps work as excepted):
; Relative positioning
G91; Lift Z
G1 Z5 F6000; Course home X and Y
G1 X-210 Y-210 F1800 S1; Move away from the endstops
G1 X5 Y5 F6000; Fine home X and Y
G1 X-210 Y-210 F360 S1; Absolute positioning
G90; Go to first bed probe point and home Z
G1 X0 Y15 F1800
G30 -
@coolm8 said in Wrong position after homing axes:
M558 P1 ;X1 Y0 Z1 H5 F120 T5000 Set Z probe type to unmodulated, the axes for which it is used and the probe + travel speeds
there is a ; in the middle of this command
G31 P500 X0 Y0 Z0.35 Set Z probe trigger value, offset and trigger height
your probe does not have an x and y offset?
you obviously need to change the steps/mm when you change the microstepping.
try
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping without interpolation
M92 X78.7402 Y78.7402 Z1066.6666 E832 ; Set steps per mmM201 X2500 Y2500 Z100 E250 ; Set accelerations (mm/s^2)
try reducing the acceleration and see if the noise disappears.
set it to something small like 500 for x and y -
@veti said in Wrong position after homing axes:
X78.7402
The ; means that i commit out these settings. In the documentation of the duet IR/Probe stands to set it to MP558 P1.
All other changes do not make any difference. Since this strange sound is coming only from one single movement (the one that comes directly after homing and before moving to the home position). It cannot have anything to do with the configuration. Homing X or Y by it self works all fine and moving the print head after that too. I can print all fine, it only bugs me that the prints are always offset in the x axis.
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@coolm8 said in Wrong position after homing axes:
duet IR/Probe
there is no way that you are using this probe and not having an offset.
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I did add the offset in X of 40 so now i have:
M558 P1
G31 P500 X40 Y0 Z0.35But still no difference.
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execute your homeall manually (entering each statement in the console). which one of the commands is producing the noise.
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Ok, did not think about that.
It is the following command. G30
Strange thing is that if I remove that from homeall.g, it does not probe the bed, but it still has this strange movement in Y and then goes to wrong home position.So homeall.g looks like this now and i can execute every step manualyl without issue:
; Relative positioning
G91; Lift Z
G1 Z5 F6000; Course home X and Y
G1 X-210 Y-210 F1800 S1; Move away from the endstops
G1 X5 Y5 F6000; Fine home X and Y
G1 X-210 Y-210 F360 S1; Absolute positioning
G90; Go to first bed probe point and home Z
G1 X0 Y15 F1800 -
G30 determines z=0 by moving the bed up until it triggers the probe.
maybe the bed is touching the hotend before the probe triggers. that could make some noise.does the strange movement happen when you execute G1 X0 Y15 F1800 ?
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No, the bed is not touching the sensor. homez.g does also contain the command G30. If i removed from there i get the error 'homing Z failed'.
After all axes are hommed i can execute G30 without any issue.So for me it seems like this is the issue:
homing X and Y puts the printhead at front left corner of the printer, stopped by endstops at Xmin and Ymin. Then i can move the printhead just fine with manual commands.
As soon as G30 gets executed the firmware thinks the print area is about X40 Y0, so the initial movement of G30 from X0 Y0 to X0 Y15 makes this strange motor noise. After it has done the probing an the printhead moves to X40 Y0 and resets the coordinates to X0 Y0. From then on G30 does exactly the same movements as before without any strange noise and smoothly running motors.Somehow I believe the printer thinks moving from real X0 Y0 to X0 Y15 is an impossible move (the motors sound quit like when the run in to force and cannot move any further), but it still executes it.
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hmm your config seems to be missing the
M574 Z1 S2 ; set endstops controlled by probe -
@coolm8 said in Wrong position after homing axes:
Somehow I believe the printer thinks moving from real X0 Y0 to X0 Y15 is an impossible move (the motors sound quit like when the run in to force and cannot move any further), but it still executes it.
find out where its grinding on. the endstops?
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It is not grinding anywhere. It makes the move correctly just the sound is weird.
This is not a mechanical issue, it is only software side.
It only happens wile probing, i can make exactly the same move just fine before the Z-axis is homed (i cannot do it afterwards because the software does not allow me to go negativ on the X axis).I alread had the following:
M574 X1 Y1 Z1 S0changing to the following did not bring any changes:
M574 X1 Y1 S0
M574 Z1 S2Why is G30 affecting the X and Y axes anyway?
Might it be that i have the Duet Wifi 1 but running recently updated Version:
Firmware Electronics: Duet WiFi 1.0 or 1.01
Firmware Version: 2.03 (2019-06-13b2)
WiFi Server Version: 1.23
Web Interface Version: 1.22.6 -
@coolm8 said in Wrong position after homing axes:
M558
its not but it might be picking up your X1 in M558 command
try replacing the entire line with
M558 P1 H5 F120 T6000 ; set Z probe type to unmodulated and the dive height + speeds -
@veti said in Wrong position after homing axes:
M558 P1 H5 F120 T6000
This still has no effect on this behavior.
To be exact, the X offset after homing is 58mm. When execute an emergency stop after homing Z, I can move the X-axis to -58 until the endstop triggers. I then can manually go forward 204mm until I reach the end of the other side of the X axis (from -58 to 164). This shows that the motors and the stepping is set up correctly.I have taken a video of the steps from Z-Axis homing. The strange movement beginns at 1:00 minute into the video. See: https://youtu.be/9m7Y-PwS-pI
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the video is private
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@coolm8 said in Wrong position after homing axes:
M564 H0
can you remove this? this should not be in a normal config.
also the normal place for the M208 command is after the M84. This should not be a problem for your config i think, but on certain commands the order is important.
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If I remove M554 H0 I cannot home any axis anymore. No matter what i choose homeall, home X, ... I get this error: G0/G1: insufficient axes homed
I fixed the video and it should now be accessible:
https://youtu.be/9m7Y-PwS-pI -
@coolm8 said in Wrong position after homing axes:
If I remove M554 H0 I cannot home any axis anymore. No matter what i choose homeall, home X, ... I get this error: G0/G1: insufficient axes homed
This is because of this
@coolm8 said in Wrong position after homing axes:
; Lift Z
G1 Z5 F6000You need to add S2 to that G1 Z move so that it can move without being homed first.
