Core XYU Z Movement Issue
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firmware version? Duet board type?
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;M669 K5 ; switch to CoreXY mode M669 K1 X1:1:0:0 Y1:-1:0:1 Z0:0:1:0 U0:0:0:1
M669 K5 should work for corexyu. Why did you switch to a custom matrix?
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Duet 2
Firmware 2.05.1 -
Because there is a fault with K5 that is not corrected until V3. I do not really want to go to V3 yet.
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@pcsentinel said in Core XYU Z Movement Issue:
I have just started to work towards dual printing, but the issue I have just discovered is that when X is active then Z movement is as you would expect, however when U is active and you try and change Z then the Z Carriage moves as expected but at the same time the U carriage is moved towards its home location.
Are you sure you mjean Z and not Y? What is the "Z carriage"?
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Hi DC42, following further tests, it seems to happen with both Y and Z instructions. So with the attached video, The active tool is Tool 1 (U) and I have sent a G1 Z25. The U Carriage moves back to Home and the Z Carriage moves down . If you then send a U-1 from the console. the U moves back to its original location and 1 left.IMG_3633.mp4
When Tool 0 is active (X) then all works properly.
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What that homing move shown in the video?
Can you pot your homing files and any tool change files?
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The homing move was not called, that just occurs when you do a Z or Y move, that's the whole issue. The tool files are empty.
If I make Tool 0 o r Tool 2 active (which does not exist I know), then Z and Y moves act as expected. This only occurs when Tool 1 is active
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why do you have v axis defined ?
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@hackinistrator Because I am using the same logic as worked out in https://forum.duet3d.com/topic/16375/core-xyu-or-xyuv/25?_=1615925048500
Which means (as far as I understand) you have 4 motors for a core XYU all of which need to move independently to achieve XY or UY movement.
As I've said above, All X Y U Z movement works absolutely fine when T0 is the active tool, than anomaly only happens when T1 is active.
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@pcsentinel i think you are making a mess .
for dual carriage (coreXY) printer , if you have 2 motors for each carriage , then its XYUV .
if the second carriage connected to a single motor then its XYU .
your matrix defined as XYU , but drive mapping its XYUV .
how is the second carriage actually connected ? -
@hackinistrator Sorry, but I think you are wrong, please see: the link from above. Also the firmware code from the Duet is as follows:
case KinematicsType::coreXYU: // Core XYU is like CoreXY with an additional U axis controlled by the U and V motors inverseMatrix(0, 1) = 1.0; inverseMatrix(1, 0) = 1.0; inverseMatrix(1, 1) = -1.0; inverseMatrix(1, 3) = 1.0; inverseMatrix(1, 4) = -1.0; inverseMatrix(3, 4) = 1.0; inverseMatrix(4, 4) = 0.0; // V can't be commanded directly break; case KinematicsType::coreXYUV: // CoreXYUV is a dual CoreXY setup inverseMatrix(0, 1) = 1.0; inverseMatrix(1, 0) = 1.0; inverseMatrix(1, 1) = -1.0; inverseMatrix(3, 4) = 1.0; inverseMatrix(4, 3) = 1.0; inverseMatrix(4, 4) = -1.0; break;
i.e. a core XYUV effectively has two XY carriages whereas a Core XYU has 2 heads mounted on a single Y carriage.
I am guessing I have 1 setting wrong somewhere that is causing this issue. Do you have a Core XYU machine, if so maybe you could post the config.g so that I can do a comparison.
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Can you post some pictures of your machine?
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@pcsentinel please tell hoy many motors connected to your second carriage .
its possible to make coreXYUV with single gantry , if 2 motors control second carriage . -
@hackinistrator There are4 motors controlling the XYU carriage. please see my post above which shows you that the firmware defines that as being core XYU
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then its core XYUV , your m669 is wrong .
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@hackinistrator 4 motors:
case KinematicsType::coreXYU:
// Core XYU is like CoreXY with an additional U axis controlled by the U and V motors
inverseMatrix(0, 1) = 1.0;
inverseMatrix(1, 0) = 1.0;
inverseMatrix(1, 1) = -1.0;
inverseMatrix(1, 3) = 1.0;
inverseMatrix(1, 4) = -1.0;
inverseMatrix(3, 4) = 1.0;
inverseMatrix(4, 4) = 0.0; // V can't be commanded directly
break; -
@Rushmere3D Hi, please see the video linked above and below.
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you defined custom matrix , not just K5 or K8 . your m669 is wrong .
if you have 4 motors for XYUV
matrix should be something like that :M669 X1:1:0:0:0 Y1:-1:0:1:-1 Z0:0:1:0:0 U0:0:0:1:1 V1:-1:0:1:-1
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I will look at the matrix, but I am failing to understand the relationship to the actual issue, which is that when Tool 0 is active then everything works fine, but when Tool 1 is active then the U is parked for any Y or Z moves.
To prove it, here is a video taken with Tool 0 active.x1.mp4