Hotend fan shutting off too early
Hello, I have a Duet2wifi installed on a MP Delta pro.
I have most of the kinks worked out, but this one is my biggest problem right now.
As soon as the print finishes, the heater shuts off and the printer homes away from the print, which is what I want, BUT, the hotend fan will also shut off, before it's cooled down, creating the chance of clogs.
I was using fan 0 for the HE, I read someone suggesting to use the parts cooling fan in fan 0, and H0 cooling fan in the other slots, so I did that, updated the changes through configurator, still shutting off after the print too early.
Could it be something in my end gcode on the slicer?
Veti last edited by
post you config.g
; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
; generated by RepRapFirmware Configuration Tool v3.1.8 on Tue Nov 24 2020 23:22:55 GMT-0800 (Pacific Standard Time)
; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Delta Pro" ; set printer name
M665 R195.69 L283.2 B135 H335 ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0 ; put your endstop adjustments here, or let auto calibration find them
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet
M569 P0 S0 ; physical drive 0 goes backwards
M569 P1 S0 ; physical drive 1 goes backwards
M569 P2 S0 ; physical drive 2 goes backwards
M569 P3 S1 ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3 ; set drive mapping
M350 X128 Y128 Z128 E128 I0 ; configure microstepping without interpolation
M92 X640.00 Y640.00 Z640.00 E3326.01 ; set steps per mm
M566 X1200.00 Y1200.00 Z1200.00 E300.00 ; set maximum instantaneous speed changes (mm/min)
M203 X18000.00 Y18000.00 Z18000.00 E18000.00 ; set maximum speeds (mm/min)
M201 X3000.00 Y3000.00 Z3000.00 E9000.00 ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E2000 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout
; Axis Limits
M208 Z-12 S1 ; set minimum Z
M574 X2 S1 P"!xstop" ; configure active-high endstop for high end on X via pin !xstop
M574 Y2 S1 P"!ystop" ; configure active-high endstop for high end on Y via pin !ystop
M574 Z2 S1 P"!zstop" ; configure active-high endstop for high end on Z via pin !zstop
M558 P5 R1 C"!zprobe.in+zprobe.mod" H5 F1200 T3600 ; set Z probe type to effector and the dive height + speeds
G31 P800 X0 Y0 Z-0.15 ; set Z probe trigger value, offset and trigger height
M557 R135 S20 ; define mesh grid
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 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 S100 ; set temperature limit for heater 0 to 100C
M308 S1 P"e0temp" Y"thermistor" T500000 B4723 C1.19622e-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
M143 H1 S280 ; set temperature limit for heater 1 to 280C
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 S0 H-1 ; set fan 1 value. Thermostatic control is turned off
M950 F2 C"fan2" Q500 ; create fan 2 on pin fan2 and set its frequency
M106 P2 S1 H1 T45 ; set fan 2 value. Thermostatic control is turned on
M563 P0 S"Part Cooling" D0 H1 F0:1:2 ; 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
; Custom settings
G29 S ; Load height map from file
M501 ; load saved parameters from non-volatile memory
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
deckingman last edited by deckingman
@akuma211 You defined fans 0 and 1 as non-thermostatic part cooling fans and fan 2 as the hot end heat sink cooling fan which is set to run thermostatically with heater 1. So far so good. But then you've mapped fans 0,1 and 2 to tool 1 such that all 3 will be treated as part cooling fans - not so good.
So change this line...........
M563 P0 S"Part Cooling" D0 H1 F0:1:2 ;
to this ..........
M563 P0 S"Tool 0" D0 H1 F0:1 ; or whatever name you want the tool to be -"part cooling" is not a good name for a tool which has an extruder drive and a heater associated with it as well as fans.
The important thing is that you remove Fan 2 from that M563.
I'll update my settings and do a test print!
deckingman last edited by
@akuma211 To elaborate, the firmware will take any M106 commands that are in a slicer gcode file, and apply them to any fans that are associated with a tool as if those fans are part cooling fans. So what is likely to have happened is that you slicer end code has an M106 S0 which will turn off any and all part cooling fans, and because you had mapped fan 2 (as well as fans 0 and 1) to the tool, then that M106 S0 will turn off all 3 fans.
@deckingman that explains what happened. I was having trouble with the part cooling fans early in the install, turned out I didn't crimp the wire correctly on, and I was messing with the config files.
I remember changing that section in config trying to get the fan working, and now you showed me what it affected lol.
Appreciate the help fixing it. Now I see myself looking at the smart effector, instead of the nozzle tip piezo sensor, this hobby is never ending lol