Solved: Jogging past axis limits..?
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I've finally got the axes on my CNC machine doing what they're supposed to do, in the direction they're supposed to go in, and I've configured the axis minima and maxima according to the guide, but how is it that I can jog past these limits?
This is disconcerting because I can jog the machine to the point where they impact the proximity sensors and, push further than they're supposed to go at the other end!
OK, so I appreciate I shouldn't do this anyway, but I was rather hoping the settings would prevent me from accidentally doing it, too. I've disabled jogging on startup until the machine's been 'homed' (using M564 S1 H1).
This may be specific to CNC machines, but does anyone have any ideas, please?
Thank you.
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@nightowl999 post your homing files and your config.g
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I think I've sussed it, @jay_s_uk.
I've got the M564 S1 H1 line in my config.g file, but whilst 'playing' with getting my axes working I've been using M564 S0 H0 to allow me to jog - not realising I should have used M564 H0 S1.
Thanks anyway
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Actually, I haven't sussed this out...
I've used the M564 S1 H1 to forbid movement of axes that have not been homed and limit movement within axis boundaries, and after starting up and before homing any of the axes, I get the "G0/G1: Insufficient axes homed" error, which I would expect.
When I send M564 S1 H0 code (to allow movement but within axis limits), I can move the axes in any direction, but exceed the axis limits.
However, after I home all the axes (to rear, right, up) and then try to move any of the axes, I get a "G0/G1: target position outside machine limits" error every time and can't move any axis in any direction.
I wonder if this is related to the fact I'm operating in 'negative' space, i.e. machine "Home" is rear, right, up and all movements from that starting point are numerically negative?
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@nightowl999 sounds like you've not set it up quite right. Can you post your config and homing files?
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Here you go, @jay_s_uk...
(I'd like to know how to do this with the colourful screens others use...); General preferences
M453 ; set machine to CNC mode
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Heretic" ; set printer name; Network
M552 P0.0.0.0 S1 ; enable network and acquire dynamic address via DHCP
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet; Configure Drives
M569 P0.0 S0 ; physical drive 0.0 goes backwards - X axis
M569 P0.1 S1 ; physical drive 0.1 goes forwards - Y1 axis
M569 P0.2 S1 ; physical drive 0.2 goes forwards - Y2 axis
M569 P0.3 S0 ; physical drive 0.3 goes backwards - Z axis
M584 X0.0 Y0.1:0.2 Z0.3 ; set drive mapping; Configure Motors
M350 X16 Y16 Z16 I1 ; configure microstepping with interpolation
M92 X400 Y400 Z400 ; set steps per mm
M566 X500 Y500 Z500 ; set maximum instantaneous speed changes (mm/min)
M203 X2500 Y2500 Z2500 ; set maximum speeds (mm/min)
M201 X150 Y150 Z150 ; set accelerations (mm/s^2)
M906 X2400 Y2400 Z 2400 ; set motor currents (mA) 80% of maximum (3000mA)
M84 S0 ; Disable motor idle current reduction; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X549 Y787 Z100 S0 ; set axis maxima
; M208 X0:535 Y0:787 Z0:100 S0 ; set axis minima and maxima; Endstops
M574 X1 S1 P"io8.in" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin io8.in
M574 Y1 S1 P"io6.in+io3.in" ; configure switch-type (e.g. microswitch) and dual self-squaring high ends on Y1 via pin io6.in and on Y2 via pin io3.in
M574 Z1 S1 P"io2.in" ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin io2.in; Fans
M950 F0 C"out8" Q500 ; create fan 0 on pin out 8 and set its frequency
M106 P0 S0.5 H-1 ; set fan 0 value. Thermostatic control is turned off; Makita and relay configuration
M950 R0 C"out1+out7" ; enable router relay on out8
M563 P0 S"Makita" R0 ; assign spindle 0 to tool 0 and name it Makita
T0 ; select tool 0; Custom settings are not defined
; Miscellaneous
M564 S1 H1 ; Disable jog commands when not homed...and the Homeall file, too...
G91 ; relative positioning
G1 H1 Z100 F2400 ; move quickly to the Z axis endstop (first pass)
G1 H2 Z-5 F2400 ; go back 5mm
G1 H1 Z100 F240 ; move slowly to the Z axis endstop (second pass)
G1 H2 Z-3 F240 ; go back 3mm
G1 H1 X549 Y787 F2400 ; move quickly to X and Y axis endstops (first pass)
G1 H2 X-5 Y-5 F2400 ; go back 5mm
G1 H1 X549 Y787 F240 ; move slowly to X and Y axis endstops (second pass)
G1 H2 X-3 Y-3 F240 ; go back 3mm
G90 ; absolute positioning -
@nightowl999
do you have and H564 statements in your homing macros ?formating: use three back ticks , the one under the ~, top left of your keyboard.
test
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Forgive me, @sinned6915, but I'm not really sure what you mean, but I don't have H564 statements in the homing files. I do have them in the config.g file, though (M564 S1 H1)
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@nightowl999 both your X and y endstop locations are set to the minima (
X1andY1). When you home, the minima limit from M208 is applied even though you're moving to the Maxima.
Change the 1 to a 2 (soX2Y2) in yourM574Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is
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There is definitely something wrong with the configuration files of my machine.
As I understand it, M564 is used to limit (or not) axis movements, with the S limiting (or not) movement outside the axis boundaries and H to allow (or not) moving the axes without homing.
In my config.g file (above) there is the line "M564 S1 H1" and, when I first start up the machine, I can't move an axis without homing it first, as I would expect (and I get the G0/G1: insufficient axes homed error).
If I then send M564 H0 S1, I can move any axes in any direction, but also past it's limits, which I thought the S1 would prevent.
Am I going mad?
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I did that, @jay_s_uk, but then the endstops didn't activate, but I'll try (anything) again!
UPDATE: Now I get the G0/G1: target position outside machine limits when I try to move any axis. The proximity sensors do work, though!
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@nightowl999 you'll need to do the same with your Z endstop too.
There's also no need to include M564 as S1 H1 are the default setup -
I'm in the process of doing that now, @jay_s_uk, but won't I still have the same problem?
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@nightowl999 not if you're jogging to the -ve once homed
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Blinkin' 'eck, @jay_s_uk, you've only gone and sorted it!
The only thing, and I might just have to get used to this, is that the machine home coordinates are back to the maxima values, rather than 0, 0, 0 I was hoping to achieve.
I don't care any more
. It's not as if the machine co-ordinates really matter with a CNC, as the starting point of the work being cut is more important! -
@nightowl999 exactly. Typically front left is 0,0. Ideally you want it there as otherwise whatever you're cutting is the opposite way it appears on screen.
Homing to max is perfectly fine.
If you did want to flip it the other way you'd have to change your M574s back, flip the move direction in M569 and rewrite your homing files to move towards the minima rather than the maxima -
Thanks, @jay_s_uk. I think it's time I started doing stuff, rather than messing about!
Talking of homing... Because I can't really reach the back of the machine when it's homed, I temporarily REM'd out the lines relating to the Y axes in the homeall.g file. But, it still homed the Y axes.
Does the Home All button on the dashboard run the homeall.g file, or the individual home files?
Few things are more dangerous than taking the advice of someone who thinks he knows what he's doing.
I'm still on my learning curve, so take everything I say with caution!RatRig 1075, Duet3 MB6HC, Sorotec SFM 1000 PV-ER milling motor, Hobbyist
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@nightowl999 homeall but if a certain axis isn't there, it then calls the homing file for that axis, unless they're hidden
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Well, I don't know who had that foresight, @jay_s_uk, but that would explain the magical event
I really appreciate the help, thank you.
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@nightowl999 said in Solved: Jogging past axis limits..?:
I think it's time I started doing stuff, rather than messing about!
That will leave a bruise if your don't sort this out!
Did you follow the basic comissioning procedure that it outlined in the docs?
https://docs.duet3d.com/en/How_to_guides/Commissioning#h-7-check-endstops
Its really straight forward to to take it step by stepIf you do it 'half-way' then it WILL come back to haunt you someday. DAMHIKT!
