Voron Corexy weired x/y movement
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Dear Duet Community,
for weeks I've been struggeling with a weired erratic behavior with my Voron build.
It's a core xy build and the x/y axis sometimes work and sometimes do some unexpected moves, see video (seeing is better than describing it).
https://www.youtube.com/watch?v=aFjJciD4qlc
what actually happens is, that sometimes moves are fine and suddenly the moves are not x/y but x+y with an unhealthy sound.
What I tried so far:
- switched Board
- tried different drivers/connectors
- recrimped all connectors (multiple times)
- changed motor cables
- tried different software configurations
- checked configuration from https://docs.duet3d.com/User_manual/Machine_configuration/Configuration_coreXY all fine.
- increased and decreased belt tension
My current config.g (reduced to a minimum until movement works)
; General preferences G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"Voron" ; set printer name M669 K1 ; select CoreXY mode ; Network M552 S1 ; enable network and acquire dynamic address via DHCP M586 P0 S1 ; enable HTTP M586 P1 S1 ; enable FTP M586 P2 T1 S0 ; disable Telnet ; Drives for XY M569 P0 S1 ; A motor M569 P1 S2 ; B motor ; Drives for Z M569 P2 S1 ; Front left M569 P3 S0 ; Back left M569 P4 S1 ; Back right M569 P5 S0 ; Front right ; Drive for extruder M569 P6 S0 ; physical drive 1.0 goes forwards ; Drive mappings (assign previously M584 X0 Y1 Z2:3:4:5 E6 ; set drive mapping ; General drive config like speeds, accel, jerk, etc M350 E64:64:64:64 I0 ; configure microstepping without interpolation M350 X16 Y16 Z16 I1 ; configure microstepping with interpolation M92 X160.00 Y160.00 Z400.00:400.00:400.00:400.00 E420.00 ; set steps per mm M566 X900.00 Y900.00 Z900.00:900.00:900.00:900.00 E120 ; set maximum instantaneous speed changes (mm/min) M203 X60000.00 Y60000.00 Z60000.00:6000.00:6000.00:6000.00 E120.00 ; set maximum speeds (mm/min) M201 X6000.00 Y6000.00 Z4000.00:4000.00:4000.00:4000.00 E250.00 ; set accelerations (mm/s^2) M906 X1200 Y1200 Z1200:1200:1200:1200 E400 I100 ; set motor currents (mA) and motor idle factor in per cent M84 S30 ; Axis Limits M208 X0 Y0 Z0 S1 ; set axis minima ;M208 X301 Y305 Z265 S0 ; set axis maxima original - not sure which build plate used? M208 X350 Y350 Z350 S0 ; set axis maxima ; Endstops M574 X2 S1 P"io1.in" ; X Hall effect endstop M574 Y2 S1 P"io2.in" ; Y Hall effect endstop M574 Z1 S2 ; configure Z-probe endstop for low end on Z ; Z-Probe M558 P8 C"io3.in" H5 F120 T60000 ; set Z probe type to unmodulated and the dive height + speeds G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height M557 X15:215 Y15:195 S20 ; define mesh grid ; Enable 12864 display M918 P2 E4 F2000000My last guess would be that one of the motors is defective. Any hint would be highle apreciated.
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@timtom why that 64 microstepping? Try 16 with I1
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@pcr
Thanks for the input,
x / y motor are already in 16 I1
64 is currently configured for Extruder (will take about that one later once x/y/z work correctly) -
@timtom all your entries for Z after M584 should only have one value
M92 X160.00 Y160.00 Z400.00:400.00:400.00:400.00 E420.00is incorrect and should be
M92 X160.00 Y160.00 Z400.00 E420.00M350 E64:64:64:64 I0is also incorrect as you only have one extruder. it should be
M350 E64 I0 -
@jay_s_uk
Thanks Jay, updated that, tried many many different configurations, just adapted your changes, I'm currently not worried about correct stepping.
The erratic behavior is still there.For the record here the updated config.g file:
; General drive config like speeds, accel, jerk, etc M350 E16 I0 ; configure microstepping without interpolation M350 X16 Y16 Z16 I1 ; configure microstepping with interpolation M92 X160.00 Y160.00 Z400.00 E420.00 ; set steps per mm M566 X900.00 Y900.00 Z900.00:900.00:900.00:900.00 E120 ; set maximum instantaneous speed changes (mm/min) M203 X60000.00 Y60000.00 Z60000.00:6000.00:6000.00:6000.00 E120.00 ; set maximum speeds (mm/min) M201 X6000.00 Y6000.00 Z4000.00:4000.00:4000.00:4000.00 E250.00 ; set accelerations (mm/s^2) M906 X1200 Y1200 Z1200:1200:1200:1200 E400 I100 ; set motor currents (mA) and motor idle factor in per cent M84 S30 -
@timtom your other lines need changing, so M566, M203, M201 and M906
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Thanks for the quick reply, unfortunately still no success
for the record:
; General drive config like speeds, accel, jerk, etc M350 E16 I0 ; configure microstepping without interpolation M350 X16 Y16 Z16 I1 ; configure microstepping with interpolation M92 X160.00 Y160.00 Z400.00 E420.00 ; set steps per mm M566 X900.00 Y900.00 Z900.00 E120 ; set maximum instantaneous speed changes (mm/min) M203 X60000.00 Y60000.00 Z60000.00 E120.00 ; set maximum speeds (mm/min) M201 X6000.00 Y6000.00 Z4000.00 E250.00 ; set accelerations (mm/s^2) M906 X1200 Y1200 Z1200 E400 I100 ; set motor currents (mA) and motor idle factor in per cent M84 S30 -
@timtom definitely sounds quite mechanical in nature.
what firmware are you running? -
That's my fear, that x or y motor has a defect. . .
Currently I use RepRapFirmware for Duet 3 Mini 5+ 3.4.0beta6 (2021-11-06)
But previously I also had the latest stable --> same issue. -
This post is deleted! -
@arnold_r_clark
Thanks for the hint, will check this evening to be sure.On the other hand I somehow doubt that to be the reason:
- There are also clean movement (sometimes x and y works just fine, to just instantantly switching to the erratic behavior).
- While recrimping I made sure that "colors" match. These are genuine LDO/Voron motors bought from a European distributer, so the risk should be comparably low.
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@timtom just to give you a bit of reassurance its not firmware, I run 2 corexy's on 3.4b6 and one of them is a Voron V0 using LDO motors
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@timtom said in Voron Corexy weired x/y movement:
That's my fear, that x or y motor has a defect. . .
Have you tried testing the motors independently? E.g. releasing the belt tension and issuing manually G1 command with H2 parameter.
If the motors are ok, make sure your gantry is de-racked (nero3dp has an instruction video) , the belts seat properly and that there are no mechanical friction or binding.
A stepper motor analyzer would help https://forum.duet3d.com/post/262112
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@timtom said in Voron Corexy weired x/y movement:
checked configuration from https://docs.duet3d.com/User_manual/Machine_configuration/Configuration_coreXY all fine.
Can you make a video showing you going through the motion testing section of this guide to show correct movement?
From your video it really seems like a motor direction is incorrect and is fighting the other motor.
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OK shame on me!
While I wanted to replace the x/y motors I detected that the belt was misguided and rubbing on plastic!So please excuse my "wrongly" reported issue.
Bear with me, I had so many external issues during the build (badly soldered hall effect platines, badly soldered extruder pcb's, broken duet board, wrongly configured wiring loom).
Everything took me several hours to identify (I ordered all parts in Europe, with the hope to avoid Chinese quality issues - wrong assumption).After days of troubleshooting I stopped to challenge my own work, sorry for that.
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@timtom, that's normal. We all struggle with similar problems.
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