@jay_s_uk

woot! I think we have got there - I took the card out, gave it a blow, re installed and and its no been recognised by the device manager!

@o_lampe

i think've figured it out, and it's all user error!

my mistake was assuming that by homing it the "machine position" should be 0 0 0. This is wrong, the "machine position" SHOULD be 270 270 0.

I totally ignored/forgot about the fact that I can set the "work" position to 0 0 0, which when done so moved the machine to the opposite side, and all the negative numbers become positive and Gcode now "seems" to be working as expected.

At least I think that's correct. More experimantaion is needed

@o_lampe said in CNC will only work with nagative coordinates/numbers:

@mattyd said in CNC will only work with nagative coordinates/numbers:

M98 P"config-axes-limits.g"
M98 P"config-axes-endstops.g"

These are the files we are interested in. C'mon, work with me...

Sorry Here you go

config-axes-limits.g

; Axes Limits configuration executed by config.g

M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X270 Y270 Z88 ; Set axis maxima

and config-axes-endstops.g

; Endstop configuration executed by config.g

M574 X2 P"xstop" S1 ; Set active low X endstop
M574 Y2 P"ystop" S1 ; Set active low Y endstop
M574 Z2 P"zstop" S1 ; Set active low Z endstop

@o_lampe

; Configuration file for Duet
; executed by the firmware on start-up
; WorkBee Firmware Version 1.1

global systemSettingsVersion={1.2}

; Configuration files
M98 P"config-network.g"
M98 P"config-drives.g"
M98 P"config-axes.g"
M98 P"config-axes-limits.g"
M98 P"config-axes-calibration.g"
M98 P"config-axes-endstops.g"
M98 P"config-probe.g"
M98 P"config-spindle.g"
M98 P"config-laser.g"

; Other Settings
M453 ; Put the machine into CNC Modes
G90 ; Set absolute coordinates
M140 H-1 ; Disable heated bed
M564 S1 H1 ; Disable jog commands when not homed
M911 S21.0 R23 P"G91 G1 Z3 F1000" ; Configure power loss resume

; User Configuration files
M98 P"config-user-settings.g"

M501 ; Load Stored Parameters 

btw. my "config-user-settings.g" are empty

@o_lampe said in CNC will only work with nagative coordinates/numbers:

@mattyd You could check your endstop-definition: does it home to 0,0 and is that defined as min? Same for the M208 config.
The Z-axis is a different shoe. Some want to have Z0 at the top, others on bed level...

When homed this is what I see via the control panel

No idea why the tool position for X is at 10, but the Machine Position says it's at its max, logically shouldn't that show x:0 y:0 z:0 ?

Hi All,

So I'm new to this and I am probably missing something obvious (so sorry in advance)

My cnc, when homed moves to the bottom left - as per this image

but to move it to the right (X axis) I have to use negative numbers. Same with the Y and Z axis.

Logic tells me this is incorrect, and when working up a simple square using positive numbers my cnc is unable to produce this shape. I can of course manually edit the Gcode to add a "-" in front of everything but that seems a little silly and counterintuitive.

As an example, this square has a start point at the bottom left (as per my cnc) but uses positive numbers to make the shape towards the right-hand side. My cnc can only make this shape if I use negative coordinates rather than positive ones.

Does anyone know how I can fix this?

@dc42
Hi again! I was wondering if you could help with something else....In you Gcode you gave me for the simple square to get it to work you had to change everything to negative/minus figures.

whats the best way to flip my Cnc work area to work with positive numbers? Logically this makes more sense I think, esp when dealing with other peoples files

@dc42 said in Help with Gcode needed:

G1 X-50 Y0 F3000
G1 X0 Y0
G1 X0 Y-50
G1 X-50 Y-50

That worked! omg!

So with this in mind what was I missing originally, have I missed a step in correctly setting this up?

@dc42 A Little update that I think is encouraging.

I copied your code (the one that you supplied) into the "send" tab at the top, and hit "Send"

the error I got back is written at the bottom - this looks encouraging

@dc42 said in Help with Gcode needed:

@mattyd how did you enter the GCode, and how are you sending it to the Duet or otherwise getting the Duet to execute it?

Via the dashboard (which is a workbee version/skin) I go to Jobs/Upload G-Code and execute it.

Once I hit "yes" I get this error

Followed by the error I posted that's copied from the Consol.

the actual file that Im uploading and using is this one

https://we.tl/t-5PxO8VPyPI

@droftarts said in Help with Gcode needed:

M115

FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 3.3 ELECTRONICS: Duet Ethernet 1.02 or later FIRMWARE_DATE: 2021-06-15 21:45:03<LF>ok<LF>

the Qcode is copied directly from @dc42 code above

G0 X25 Y25        ; move to X25 Y25 at maximum speed
G1 X75 F3000      ; move to X75 Y25 at 3000mm/min
G1 Y75            ; move to X75 Y75
G1 X25            ; move to X25 Y75
G1 Y25            ; move to X25 U25

Im pretty sure it's good because I can load the code into the G-Code Viewer and it shows up just fine (I can't upload the actual file as its an unsported format ".nc" )

Here is the full error, and thank you for your help!

M32 "0:/gcodes/Square from forum.nc"
File 0:/gcodes/Square from forum.nc selected for printing
Error: Bad command: ��G
Error: Bad command: 0
Error: Bad command: X
Error: Bad command: 2
Error: Bad command: 5
Error: Bad command: Y
Error: Bad command: 2
Error: Bad command: 5
Error: Bad command: m
Error: Bad command: o
Error: Bad command: v
Error: Bad command: e
No tool is selected
Error: Bad command: o
Error: Bad command: X
Error: Bad command: 2
Error: Bad command: 5
Error: Bad command: Y
Error: Bad command: 2
Error: Bad command: 5
Error: Bad command: a
No tool is selected
Error: Bad command: m
Error: Bad command: a
Error: Bad command: x
Error: Bad command: i
Error: Bad command: m
Error: Bad command: u
Error: Bad command: m
Error: Bad command: s
Error: Bad command: p
Error: Bad command: e
Error: Bad command: e
Error: Bad command: d
Error: Bad command: G
Error: Bad command: 1
Error: Bad command: X
Error: Bad command: 7
Error: Bad command: 5
Error: Bad command: F
Error: Bad command: 3
Error: Bad command: 0
Error: Bad command: 0
Error: Bad command: 0
Error: Bad command: m
Error: Bad command: o
Error: Bad command: v
Error: Bad command: e
No tool is selected
Error: Bad command: o
Error: Bad command: X
Error: Bad command: 7
Error: Bad command: 5
Error: Bad command: Y
Error: Bad command: 2
Error: Bad command: 5
Error: Bad command: a
No tool is selected
Error: Bad command: 3
Error: Bad command: 0
Error: Bad command: 0
Error: Bad command: 0
Error: Bad command: m
Error: Bad command: m
Error: Bad command: /
Error: Bad command: m
Error: Bad command: i
Error: Bad command: G
Error: Bad command: 1
Error: Bad command: Y
Error: Bad command: 7
Error: Bad command: 5
Error: Bad command: m
Error: Bad command: o
Error: Bad command: v
Error: Bad command: e
No tool is selected
Error: Bad command: o
Error: Bad command: X
Error: Bad command: 7
Error: Bad command: 5
Error: Bad command: Y
Error: Bad command: 7
Error: Bad command: 5
Error: Bad command: G
Error: Bad command: 1
Error: Bad command: X
Error: Bad command: 2
Error: Bad command: 5
Error: Bad command: m
Error: Bad command: o
Error: Bad command: v
Error: Bad command: e
No tool is selected
Error: Bad command: o
Error: Bad command: X
Error: Bad command: 2
Error: Bad command: 5
Error: Bad command: Y
Error: Bad command: 7
Error: Bad command: 5
Error: Bad command: G
Error: Bad command: 1
Error: Bad command: Y
Error: Bad command: 2
Error: Bad command: 5
Error: Bad command: m
Error: Bad command: o
Error: Bad command: v
Error: Bad command: e
No tool is selected
Error: Bad command: o
Error: Bad command: X
Error: Bad command: 2
Error: Bad command: 5
Error: Bad command: U
Error: Bad command: 2
Error: Bad command: 5
Finished printing file 0:/gcodes/Square from forum.nc, print time was 0h 0m