Weird Z axes movement from - to +
Hi. I have a problem with my duet wifi board and workbee (belt driven x and y, screw drive Z). When I move G1 Z-10 it moves 1 cm but trying to go back with G1 Z10 it moves more. No matter what I am typing in as movement it move to endstop/home. Do not understand what is happening. What is wrong?
; Configure Axes M92 X53.334 Y53.334 Z400 ; Set steps per mm M350 X16 Y16 Z16 I1 ; Configure microstepping M566 X500 Y500 Z500 ; Set maximum instantaneous speed changes (mm/min) M203 X10000 Y10000 Z2500 ; Set maximum speeds (mm/min) M201 X150 Y150 Z150 ; Set accelerations (mm/s^2) M906 X2400 Y2400 Z2400 I100 ; Set motor currents (mA)
Have you compared your config and homing files against the files given on the workbee website?
@jay_s_uk Yes and in config it is the same. The homez.g is slightly different since I have another Z height. Otherwise they are the same
Would be worth posting your complete config and homing files then
Config (sorry about the mess)
; Configuration file for Duet ; executed by the firmware on start-up ; WorkBee Firmware Version 1.0.7 ; Configure Connection - ENABLE ONLY ONE OF THE BELOW THREE M552 S1 ; Enable Wifi Network ;M552 S2 ; Enable Access Point Mode ;M552 S1 P192.168.2.14 ; Enable Ethernet - Change IP Address to suit ; - - - - - - - - - - - - - - - - - - - - ; General preferences M451 ; Put the machine into FFF Modes M550 MODIX MONSTER ; Set machine name G90 ; Set absolute coordinates ;define stepper motors and axis M584 X0 Y1:3 Z2 E5:6:7:8:9 ; Configure Drives M569 P0 S0 ; Drive 0 goes forwards M569 P1 S1 ; Drive 1 goes forwards M569 P2 S0 ; Drive 2 goes forwards M569 P3 S0 ; Drive 3 goes forwards ; new drivers?? duex5?? not in function yet M569 P5 S1 ; physical drive 5 goes forwards ///not in function yet M569 P6 S1 ; physical drive 6 goes forwards ///not in function yet M569 P7 S1 ; Change direction of Z motor ///not in function yet M569 P8 S1 ; physical drive 8 goes forwards ///not in function yet M569 P9 S1 ; Change direction of one motor ///not in function yet ; Heaters and pt100 M140 H-1 ; disable heated bed M305 P1 X200 ; configure PT100 for heater 1 M143 H1 S240 ; set temperature limit for heater 1 to 240C ;Tools M563 P0 S"test1" D0 H1 F0 ; 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 M563 P1 S"test2" D1 H1 F0 ; define tool 1 G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C M563 P2 S"test3" D2 H1 F0 ; define tool 2 G10 P2 X0 Y0 Z0 ; set tool 2 axis offsets G10 P2 R0 S0 ; set initial tool 2 active and standby temperatures to 0C M563 P3 S"test4" D3 H1 F0 ; define tool 3 G10 P3 X0 Y0 Z0 ; set tool 3 axis offsets G10 P3 R0 S0 ; set initial tool 3 active and standby temperatures to 0C M563 P4 S"test5" D4 H1 F0 ; define tool 4 G10 P4 X0 Y0 Z0 ; set tool 4 axis offsets G10 P4 R0 S0 ; set initial tool 4 active and standby temperatures to 0C ; Z-Probe M307 H7 A-1 C-1 D-1 ; disable heater on PWM channel for BLTouch M558 P9 H20 F120 T3000 X0 Y0 Z1 ; set Z probe type to bltouch and the dive height + speeds G31 P50 X29.4 Y34.8 Z0 ; set Z probe trigger value, offset and trigger height M557 X15:1200 Y15:1400 S100 ; define mesh grid ; Configure Axes M92 X53.334 Y53.334 Z400 ; Set steps per mm M350 X16 Y16 Z16 I1 ; Configure microstepping M566 X500 Y500 Z500 ; Set maximum instantaneous speed changes (mm/min) M203 X10000 Y10000 Z2500 ; Set maximum speeds (mm/min) M201 X150 Y150 Z150 ; Set accelerations (mm/s^2) M906 X2400 Y2400 Z2400 I100 ; Set motor currents (mA) ; Configure Axis Limits M208 X0 Y0 Z0 S1 ; Set axis minima M208 X1300 Y1475 Z110 S0 ; Set axis maxima ; Configure Endstops M574 X2 Y2 Z2 S0 ; Set active low endstops ; Other Settings ;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 M501 ; Load Stored Parameters M98 Pcustomconfig.g ; Execute custom config settings
Ps. nothing in Pcustomconfig.g
G91 ; relative positioning G21 ; Set units to mm G1 H1 Z110 F1500 ; move quickly to Z axis endstop and stop there (first pass) G92 Z110 ; Set Home Position - change to your machine size. G1 Z-3 F2400 ; go back a few mm G1 H1 Z110 F300 ; move slowly to X axis endstop once more (second pass) G92 Z110 ; Set Home Position - change to your machine size. G90 ; absolute positioning
If I use the duet Webcontrol to move the z everything works fine. But if I eg. G1 Z-30 and the G1 Z5 it moves to the endstop.
jay_s_uk last edited by jay_s_uk
What jumps out at me is that you don't need to be using G92 to set the Z position. This is set using the machine limits from the config.
Can I suggest a replacement homez?
G91 ; relative positioning G1 H1 Z120 F1500 ; move z to the high end stopping at the endstop (first pass) G1 H2 Z-5 F2400 ; go down a few mm G1 H1 Z10 F300 ; move z up once more (second pass) G90 ; absolute positioning
The G1 H1 ZXXX can be any number equal to or higher than your max limit. I typically use 999 as I'm lazy
@jay_s_uk Ahh I see. Changed the homez but still does not solve my problem. As said I can move G1 Z-30 or Z-40 etc. This works fine. But every time I do a move in the opposite direction It just go to endstop no matter what I am typing
Theres nothing I can see what would cause that.
Are you using the ooznest DWC version?
And are you just using the jog buttons to make the movements?
@jay_s_uk I am typing in the g-code command. If using the buttons it work fine.
Need to check the other question. Will Come back later.
What are you typing in?
@jay_s_uk just in the command line in Web duet control. But I have the feeling that it this also provoke an error in offset probing.
jay_s_uk last edited by jay_s_uk
I meant what commands are you typing in
Just purely G1 Z5?
@jay_s_uk Yes. Purely G1 Z-10 and then another one eg. G1 Z5
Very strange on why its going back to home. I'm afraid I've not seen this happen on the CNC i've used with RRF. Maybe someone else can chip in?
@MortenMod Are you confusing relative and absolute positioning? The
G90in your config.g sets 'Absolute coordinates'. So, assuming you are starting at Z110 after homing, you send G1 Z-30, it moves to position Z-30mm (or at least tries to, but it will generally stop at Z0). But it's moving from point Z110 to point Z-30, ie 140mm, not moving -30mm. If you sent G1 Z-30 again, it would not move, because it is already at Z-30. So when you send G1 Z5, it moves to Z5, which is 35mm away from Z=-30.
If you want G1 Z-30 to move down 30mm from it's current position (say Z110 after homing), you need to send
G91first, which switches to relative coordinates; ie if you send G91, G1 Z-30, G1 Z-30, it will move down 30 (to Z80), then another 30mm (to Z50).
(I'm not sure I've explained this very well, but hopefully you get the idea!)
Thanks a lot. It helped!