homing dual z with independant motors
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You don't have to. The E driver is assigned to the Z axis and will take all of the settings applied to Z.
M574 Z2 S1 P"!zstop+!e1stop"
That line tells the firmware that the Z endstop will be the combo of zstop and e1stop.
Home the z axis as a single axis and it will take care of the rest.
It's a lot simpler than you seem to think it is.
Again, which guides are you looking at? If it's a Duet wiki page that is leading you astray, let me know and I can try and make it clearer.
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@phaedrux ok thankyou for explaing that. So the endstops report as stopped when pushed in m119 and not stopped when not pushed but it doesnt stop the gantry had to estop[ it again
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Can you copy and paste the results of M119?
Can you also post your current config.g and homeall.g just so I'm looking at the current versions you're actually using?
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@monkey68 14/09/2021, 16:41:16 m119
Endstops - X: not stopped, Y: not stopped, Z: at max stop, Z probe: not stopped
14/09/2021, 16:41:12 m119
Endstops - X: not stopped, Y: not stopped, Z: not stopped, Z probe: not stopped
14/09/2021, 16:40:59 m119
Endstops - X: not stopped, Y: not stopped, Z: at max stop, Z probe: not stopped
14/09/2021, 16:40:31 m119
Endstops - X: not stopped, Y: not stopped, Z: not stopped, Z probe: not stopped -
@monkey68 ; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet; Drives
M569 P0.0 S1 ; physical drive 0 goes forwards
M569 P0.1 S1 ; physical drive 1 goes forwards
M569 P0.2 S0 ; physical drive 2 goes backwards
M569 P0.3 S1 ; physical drive 3 goes forwards
M569 P0.4 S0 ; physical drive 4 goes backwards;M584 X0 Y1 Z2 E3 ; set drive mapping
M584 X0.0 Y0.1 Z0.2:0.4 E0.3 ;two Z motors connected to driver outputs Z and E1
M671 X-18:224 Y112.5:112.5 S0.5 ; leadscrews at left (connected to Z) and right (connected to E1) of X axis
;M350 X16 Y16 Z16:16 E16 I1 ; configure microstepping with interpolation
M350 X16 Y16 Z16 E16 I1
;M92 X80.00 Y80.00 Z400.00:400.00 E143.2 ; set steps per mm
M92 X80.00 Y80.00 Z400.00 E143.2
;M566 X800.00 Y800.00 Z1000.00:1000.00 E3600.00 ; set maximum instantaneous speed changes (mm/min)
M566 X800.00 Y800.00 Z1000.00 E3600.00
;M203 X9600.00 Y9600.00 Z1000.00:1000.00 E6000.00 ; set maximum speeds (mm/min)
M203 X9600.00 Y9600.00 Z1000.00 E6000.00
;M201 X1000.00 Y1000.00 Z600.00:600.00 E2000.00 ; set accelerations (mm/s^2)
M201 X1000.00 Y1000.00 Z600.00 E2000.00
;M906 X1250 Y1300 Z1250:1250 E1250 I30 ; set motor currents (mA) and motor idle factor in per cent
M906 X1250 Y1300 Z1250 E1250 I30
M572 D0 S0.002 ;set pressure advance
M84 S30 ; Set idle timeout; Axis Limits
M208 X-27 Y-35 Z0 S1 ; set axis minima
M208 X250 Y225 Z300 S0 ; set axis maxima
;M208 X-5:205 Y0:200 ; X carriage moves from -5 to 205, Y bed goes from 0 to 200; Endstops ```; Snnn 1 = switch-type (eg microswitch) endstop input, 2 = Z probe (when used to home an axis other than Z), 3 = single motor load detection, 4 = multiple motor load detection
M574 X1 S1 P"!xstop" ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"!ystop" ; configure active-high endstop for low end on Y via pin ystop
M574 Z2 S1 P"!zstop" ; configure active-high endstops for low end on Z via pins zstop and e1stop
M574 Z2 S1 P"!zstop+!e1stop" ; configure active-high endstops for high end on Z via pins zstop and e1stop; Filament Sensing
M591 D0 P1 C"!e0stop" S1 ; filament monitor connected to E0 endstop; Z-Probe
M558 P1 C"zprobe.in" H3 F600 T6000 A3 S0.03 ; set Z probe type to unmodulated and the dive height + speeds
G31 P1000 X25 Y14 Z1.50 ; set Z probe trigger value, offset and trigger height
;M557 X45:265 Y45:265 S110 ; define mesh grid glass bed plate
M557 X45:245 Y45:220 S87.5 ; define mesh grid prusa bed plate; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 C0 R4700 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
;M307 H0 B1 S1.00 ; enable bang-bang mode for the bed heater and set PWM limit
M307 H0 A90.0 C700.0 D10.0 S1.00 V0.0 B1
M140 H0 ; map heated bed to heater 0
M143 H0 S150 ; set temperature limit for heater 0 to 150C
M308 S1 P"e0temp" Y"thermistor" T500000 B4723 C1.196220e-7 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
;M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
;M307 H1 A340.0 C140.0 D5.5 S1.00 V0.0 B0
M307 H1 A388.5 C88.1 D2.4 S1.00 V24.2 B0
M143 H1 S500 ; set temperature limit for heater 1 to 500C; Fans
M950 F0 C"^fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"duex.fan3" Q500 ; create fan 2 on pin duex.fan3 and set its frequency
M106 P2 S1 H1 T45 ; set fan 2 value. Thermostatic control is turned on
M950 F3 C"duex.fan4" Q500 ; create fan 3 on pin duex.fan4 and set its frequency
M106 P3 S1 H1 T45 ; set fan 3 value. Thermostatic control is turned on; Tools
M563 P0 S"Copper Head" D0 H1 F0 ; define tool 0
G10 P0 X0 Y0 Z0:0 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C; Custom settings are not defined
; Miscellaneous
T0 ; select first tool
M501 -
@monkey68 said in homing dual z with independant motors:
M574 Z2 S1 P"!zstop" ; configure active-high endstops for low end on Z via pins zstop and e1stop
M574 Z2 S1 P"!zstop+!e1stop" ; configure active-high endstops for high end on Z via pins zstop and e1stopYou only need the second line. Remove the first that just has zstop.
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@monkey68 not using home all just doing the axis separately at this stage, but here is home all;
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-282 Y265 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y-5 F6000 ; go back a few mm
G1 H1 X-282 Y265 F360 ; move slowly to X and Y axis endstops once more (second pass)
G1 H1 Z305 F360 ; move Z up stopping at the endstop
G90 ; absolute positioning
G92 Z300 ; set Z position to axis maximum (you may want to adjust this)Home z;
G90 ; absolute positioning
G1 X125 Y105 F6000 ; go to probe point
G91 ; relative positioning
G1 H2 Z305 E1305 F1800 ; lift Z relative to current position
G1 H1 Z-5 E1-5 F6000
G1 H2 Z10 E110 F360
G90
G30 ; home Z by probing the bed -
@monkey68 removed that and the endstops still do not stop the gantry
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@monkey68 said in homing dual z with independant motors:
Home z;
G90 ; absolute positioning
G1 X125 Y105 F6000 ; go to probe point
G91 ; relative positioning
G1 H2 Z305 E1305 F1800 ; lift Z relative to current position
G1 H1 Z-5 E1-5 F6000
G1 H2 Z10 E110 F360
G90
G30 ; home Z by probing the bedIf you're just doing home Z then your homez file needs to be updated to match how you're homing z in homeall. You still have the H2 move which is just going to smash into the endstop. and you still have the errant E commands.
Try this:
Home z;
G90 ; absolute positioning
G1 X125 Y105 F6000 ; go to probe point
G91 ; relative positioning
G1 H1 Z305 F1800 ; home z to max
G1 Z-5 F6000 ; back off
G1 H1 Z10 F360 ; home z again
G90
G30 ; home Z by probing the bed -
Also, if you have the probe, you don't even really need to use the endstops for Z at all.
Have you read through this page yet? https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors
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@phaedrux ok that works for homing z thankyou so much. in answer to your question have i read this many many times. i used to have duets optical end stop and my bed leveling would be all over the place and make it un printable, so i got to the point that i would not do mesh bed levelling just home and go, no problems.
thinking about it i changed the optical endstop out for a pinda probe and had similar bed mesh problems so i turned the endstops back on with independant motors trying to make sure the gantry had not sagged and causing me the mesh errors, plus homing on the high side gives me the ability to recover prints and using the probe does not -
Yes nothing wrong with using both a z endstop and probe. I do so myself for the same power recovery reason.
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@monkey68 just tried home all and the y axis drove away from the switch and homing failed so i made the following changes
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-282 Y-265 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000 ; go back a few mm
G1 H1 X-282 Y-265 F360 ; move slowly to X and Y axis endstops once more (second pass)
G90
G1 X125 Y105 F6000 ; go to probe point
G91
G1 H1 Z305 F1800 ; move Z up stopping at the endstop
G1 Z-5 F6000 ; back off
G1 H1 Z10 F360 ; home z again
G90 ; absolute positioning
G30 ; home Z by probing the bed
that seam to work
