Delta Homing Issue
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I have a delta running a Duet WiFi 1.04 and the latest RRF. If I power on or reset the machine while the print head is close to the bed the machine thinks it's at Z max when it first starts so when it gets to the endstop switches at the top it thinks it's at Z1034 instead of the actual height set in config.g and causes the error:
Error: G0/G1 : Target not reachable from current position.Anyone know what's causing this? I know my endstops are way out, I'll be fixing that soon but that shouldn't cause the error since I move down far enough to zero the X/Y axis before hand.
Here's my config.g (M501 disabled for testing):
; Configuration file for Duet WiFi (firmware version 3) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Mar 09 2021 01:07:23 GMT-0400 (Atlantic Standard Time) ; General preferences G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"Little Monster" ; set printer name M665 L397.190:397.190:397.190 R156.925 H516.342 B150.0 X-0.280 Y0.175 Z0.000 ; Set delta radius, diagonal rod length, printable radius and homed height M666 X7.120 Y0.431 Z-7.551 A0.00 B0.00 ; put your endstop adjustments here, or let auto calibration find them ; Network M552 S1 ; enable network M586 P0 S1 ; enable HTTP M586 P1 S0 ; disable FTP M586 P2 S0 ; disable Telnet ; Drives M569 P0 S1 ; physical drive 0 goes forwards M569 P1 S1 ; physical drive 1 goes forwards M569 P2 S1 ; physical drive 2 goes forwards M569 P3 S1 ; physical drive 3 goes forwards M584 X0 Y1 Z2 E3 ; set drive mapping M350 E32 I0 ; configure microstepping without interpolation M350 X32 Y32 Z32 I1 ; configure microstepping with interpolation M92 X160.00 Y160.00 Z160.00 E800.00 ; set steps per mm M566 X1200.00 Y1200.00 Z1200.00 E3000.00 ; set maximum instantaneous speed changes (mm/min) M203 X36000.00 Y36000.00 Z36000.00 E3000.00 ; set maximum speeds (mm/min) M201 X1000.00 Y1000.00 Z1000.00 E1500.00 ; set accelerations (mm/s^2) M906 X1800 Y1800 Z1800 E1500 I30 ; set motor currents (mA) and motor idle factor in per cent M84 S30 ; Set idle timeout ; Axis Limits M208 Z0 S1 ; set minimum Z ; Endstops 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 Z1 S1 P"zstop" ; configure active-high endstop for low end on Z via pin zstop ; Z-Probe ;M307 H3 A-1 C-1 D-1 ; disable heater3 for BLTouch M950 S0 C"exp.heater3" ; create servo pin 0 for BLTouch M558 P9 C"^zprobe.in" H5 F360 T7000 ; set Z probe type to bltouch and the dive height + speeds G31 P25 X0 Y20 Z0.925 ; set Z probe trigger value, offset and trigger height M557 R140 S20 ; define mesh grid ; Heaters M308 S0 P"bedtemp" Y"thermistor" T100000 B4092 ; 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 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit M140 H0 ; map heated bed to heater 0 M143 H0 S120 ; set temperature limit for heater 0 to 120C M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 ; 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 M143 H1 S285 ; set temperature limit for heater 1 to 285C ; 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 ; Tools M563 P0 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 ; Load custom settings from config-override ;M501My homedelta.g:
; homedelta.g ; called to home all towers on a delta printer ; ; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Mar 09 2021 01:07:24 GMT-0400 (Atlantic Standard Time) G91 ; relative positioning G1 H1 X630 Y630 Z630 F5000 ; move all towers to the high end stopping at the endstops (first pass) G1 H2 X-5 Y-5 Z-5 F5000 ; go down a few mm G1 H1 X6 Y6 Z6 F360 ; move all towers up once more (second pass) G1 Z-15 F5000 ; move down a few mm so that the nozzle can be centred G90 ; absolute positioning G1 X0 Y0 F5000 ; move X+Y to the centre -
@cosmic_crunch said in Delta Homing Issue:
; Endstops 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 Z1 S1 P"zstop" ; configure active-high endstop for low end on Z via pin zstop
That's not right for a delta. The endstops are at the top at the max end of travel, but you have it configured as the min end of travel.
Change X1 Y1 Z1 to X2 Y2 Z2
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Yes that was exactly the problem. Funny thing is I selected delta in the config tool so I don't know why it was set that way. I just checked the config that I downloaded originally and it was set to high end. If I had changed it to X1 Y1 S1 I would likely not have changed the description so I'm stumped how this happened...
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@cosmic_crunch said in Delta Homing Issue:
M666 X7.120 Y0.431 Z-7.551 A0.00 B0.00 ; put your endstop adjustments here, or let auto calibration find them
your endstops are very far apart
thats why in your homing the
G1 Z-15 F5000 ; move down a few mm so that the nozzle can be centred
is not enought.i would suggest you adjust your endstops if possible
