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
; 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
@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
@dc42 said in Help with Gcode needed:
That's very odd, it's as if you inserted a newline after each character.
I'm debating resetting and reinstalling the software. is there a process to reset everything and starting a fresh?
Just found this - Im guessing the "M453" is in the incorrect place and needs to be moved to "configuration files"
@dc42 said in Help with Gcode needed:
however the GCode in your post looks OK
thank you for your help! I'm going to look at this today
I did try that Gcode for the square and it through up a load of errors again. So I'm hoping the issue is with "RRF/CNC mode"
Hi all,
I'm slowly getting my head around my CNC, but as yet I've not actually done anything but move the machine around via the dashboard controls
My issue comes with the Gcode I have - my plan is to use the CNC for plotting and cutting only, so nothing that complex
I've generated some code in another app, but the Duet2 card is having none of it, it throws up a load of errors and doesn't get very far. The reason Im using this app is because it can spit out code for a tangenal knife.
any ideas?
ALSO!!! if possible could someone send me some Gcode just to plot a simple 50x50mm square? Hopefully that's simple, but Its just something I can test the machine on really
( Use case: ? )
( SVG import by GRBL-Plotter 1.7.0.1 )
( Source: C:\Users\mushr\Desktop\Export Dump\svg test.svg )
(<Header >)
( G-Code lines: 22 )
( Pen Down/Up : 2 times )
( Duration ca.: 1.1 min. )
( Conv. time : 00:00:00.0325643 )
( SVG dimension : 656.43 928.16 )
( Graphic offset: -116.60 -593.46 new origin: 0.00 0.00)
( Original graphic dimension min:116.599;593.460 max:450.196;775.673)
(</Header >)
G54 (Setup - GCode-Header)
G90
G00 Z2.000
M3 S1000 (job start)
(<Figure Id="1" Geometry="path" PenColor="black" PenWidth="0.265" PathLength="292.6"> )
G00 X202.887 Y136.297
G01 Z-2.000 F1000
G01 X202.887 Y69.688 F2000
G01 X297.571 Y69.688
G01 X297.571 Y99.414
G01 X202.887 Y136.297
G00 Z2.000
(</Figure>)
(<Figure Id="2" Geometry="path" PenColor="black" PenWidth="0.265" PathLength="1027.2"> )
G00 X7.583 Y233.817
G01 Z-2.000 F1000
G01 X7.583 Y56.009 F2000
G01 X141.352 Y56.009
G01 X141.352 Y162.254
G01 X341.180 Y162.254
G01 X341.180 Y238.221
G01 X7.583 Y233.817
G00 Z2.000
(</Figure>)
M05
M30
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!
@jay_s_uk said in Cant connect - Used CNC with Duet 2 Card:
@mattyd the diag LED is the one just above the ethernet connector.
If it doesn't power off, can you try booting the board without the SD card in and see if a COM port appears?
If it doesn't, try erasing the firmware as described here https://docs.duet3d.com/en/User_manual/Troubleshooting/Duet_wont_respond#if-the-port-still-doesnt-appear-on-the-pc
Ah, thank you. I think we might be getting somewhere then!
so just to confirm, Ive attached another image. Arrows pointing out the "DIAG LED" - Because if so it's still very much on as I sit here looking at the board
@jay_s_uk said in Cant connect - Used CNC with Duet 2 Card:
@mattyd can you run through this page? https://docs.duet3d.com/en/User_manual/Troubleshooting/Duet_wont_respond
from that page
"the DIAG LED will turn on as power is applied, then turn off as soon as the firmware starts loading, usually less than 0.5 second."
I can see no lights turn off, once plugged in they all light up and stay lit up...that said I also am unsure which led is the "DIAG LED "
Hey All,
Ive recently purchased a used CNC with a duet2 Ethernet card. Ive been told its hardly been used - And I can believe it, its in mint condition with not a hint of use/dust
But Im having issues connecting.
Its a duet2 Ethernet card.
Ive tried connecting via USB (with just the power from the USB) and nothing is appearing in my device manager, the card is lit up though, so it is getting power). Usually, Id expects a sound when something new is plugged in. There are no new notifications and no new devices under "Ports (com & lpt)" in the device manager.
I then opted to plug in the Ethernet and check my mesh network and no new devices showed up. Currently, it shows all my wired and wireless connections, but no new ones
Im debating hitting the reset button, but seeing as I've never used this card I'm unsure if it might wipe the firmware at the same time.
Anyway, that's where Im at. Any help and advice would be appreciated.
@o_lampe said in tangential knife support? Newbie questions:
@droftarts said in tangential knife support? Newbie questions:
The oscillation motor appears to need a voltage signal (it may work with PWM, but may need a PWM to voltage converter) to control the speed
It probably isn't a motor but a simple solenoid/linear actuator?That would work with PWM when driven directly by Duet (heater port)//edit I should've checked the product page. Why do they use a heavy stepper for such a simple task?
not a clue! though I think on their main desktop cncs they use two motors for each axis.
