Help with starting print height after modding a qidi tech 1
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how does the printer home z?
post your config.g
post your homeall.g
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; homeall.g
; called to home all axes
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; generated by RepRapFirmware Configuration Tool v3.1.4 on Sat Jul 25 2020 12:56:48 GMT-0400 (Eastern Daylight Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X235 Y-215 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X-5 Y5 F6000 ; go back a few mm
G1 H1 X235 Y-215 F360 ; move slowly to X and Y axis endstops once more (second pass)
G1 H1 Z205 F360 ; move Z up stopping at the endstop
G90 ; absolute positioning
G92 Z0 ; set Z position to axis maximum (you may want to adjust this); Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning -
; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Sat Jul 25 2020 12:56:48 GMT-0400 (Eastern Daylight Time); General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Qidi nova" ; set printer name; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S1 ; disable Telnet; Drives
M569 P0 S1 ; physical drive 0 goes forwards
M569 P1 S0 ; physical drive 1 goes forwards
M569 P2 S0 ; physical drive 2 goes backwards
M569 P3 S0 ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3 ; set drive mapping
M350 X32 Y32 Z32 E16 I1 ; configure microstepping with interpolation
M92 X188.2 Y189.5 Z800.00 E415.00 ; set steps per mm
M566 X900.00 Y900.00 Z180.00 E1200.00 ; set maximum instantaneous speed changes (mm/min)
M203 X18000.00 Y18000.00 Z180.00 E1560.00 ; set maximum speeds (mm/min)
M201 X1000.00 Y1000.00 Z150.00 E2000.00 ; set accelerations (mm/s^2)
M906 X610 Y610 Z610 E850 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X227 Y145 Z152 S0 ; set axis maxima; Endstops
M574 X2 S1 P"xstop" ; configure active-high endstop for high 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 high end on Z via pin zstop; Z-Probe
M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
M557 X15:215 Y15:148 S20 ; define mesh grid; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; 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
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 B4138 ; 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; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S1 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 H0:1 T45 ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"fan1" Q500 ; create fan 2 on pin fan1 and set its frequency
M106 P2 S1 H0:1 T45 ; set fan 2 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 0CM501
; Custom settings are not defined -
; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Sat Jul 25 2020 12:56:48 GMT-0400 (Eastern Daylight Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 Z205 F1800 ; move Z up until the endstop is triggered
G92 Z0 ; set Z position to axis maximum (you may want to adjust this); Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning -
@dakingofhearts2003 said in Help with starting print height after modding a qidi tech 1:
G1 H1 Z205 F1800 ; move Z up until the endstop is triggered
G92 Z0 ; set Z position to axis maximum (you may want to adjust this)That doesn't make any sense. It moves to the high end of the Z axis and then sets it as Z0.
Plus your Z endstop is defined as being on the low end.
M574 Z1 S1 P"zstop" ; configure active-high endstop for high end on Z via pin zstop
Where are you endstops physically located? I think you've got a motor direction wrong and maybe a homing move incorrect as well.
You startup gcode doesn't have anywhere that it homes Z either, just X and Y. Are you using homeall or homez at all?
@dakingofhearts2003 said in Help with starting print height after modding a qidi tech 1:
he process i used was the bed to touch the nozzle and used g92 z0 followed by m500.
M500 doesn't work that way, but touching the nozzle to the bed and sending G92 Z0 would set the height correctly.
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The endstop is bed level 0 and as it prints the bed moves down. Everything homes correctly but it keeps starting the prints about 5 mm above the bed if i can fix that im good. some settings in the config i may have changed without changing the explanation to match. like the endstops, i have no problem homing.
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@dakingofhearts2003 said in Help with starting print height after modding a qidi tech 1:
G1 H1 Z205 F360 ; move Z up stopping at the endstop
G90 ; absolute positioning
G92 Z0 ; set Z position to axis maximum (you may want to adjust this)Ok so if you endstop is located at Z min, then your homing move in homeall and homez is going the wrong way.
Should be
G1 H1 Z-205 F360If G1 Z205 is moving towards the endstop, then your Z axis motor is rotating the wrong way.
When jogging the Z axis does Z+ move the bed and nozzle farther apart and Z- closer together?
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@Phaedrux i assure you everything is correct i made my own wires and so i had to reverse somethings. If the bed went the wrong way i wouldnf be able to home successfully.
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@dakingofhearts2003 said in Help with starting print height after modding a qidi tech 1:
Everything homes correctly but it keeps starting the prints about 5 mm above the bed if i can fix that im good.
After you homeall are you able to jog the nozzle down so that Z0 has the nozzle just touching the bed?
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Hi,
The process you used: Move nozzle to touch bed, G92 Z0 and then M500.
What do you think M500 does in this case?
Frederick
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This is how close it is after homing
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@dakingofhearts2003 said in Help with starting print height after modding a qidi tech 1:
This is how close it is after homing
You need to determine how far from the bed the nozzle is at that point.
Then you need to adjust the G92 Z0 line to specify the actual Z position at that point, and it is clearly not 0.
Let's say you determine the nozzle is exactly 5mm off the bed.
Then the line should read G92 Z5.
So then moving to Z0 would move down 5mm and should touch the bed.
Frederick
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@fcwilt i did that and still this is what i get
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Hi,
So you modified the G29 Z# line in the homez.g file?
And the nozzle is now farther away?
Frederick
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@dakingofhearts2003 said in Help with starting print height after modding a qidi tech 1:
i assure you everything is correct
And yet your nozzle is 5mm above the bed.
