Duet3D Logo Duet3D
    • Tags
    • Documentation
    • Order
    • Register
    • Login

    Hot end heatsink fan triggers on bed heater tempurature?

    Scheduled Pinned Locked Moved Solved
    General Discussion
    2
    3
    96
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • A Former User?
      A Former User
      last edited by A Former User

      Issue:

      My hot end heatsink fan triggers when sensor temp1 reaches target temp of 40c instead of when sensor temp2 reaches 40c. I have reviewed everything too many times and it must be a simple error that I keep overlooking. Please help me because Im apparently oblivious to the issue.

      Background:

      Everything was working fine on my E5+ running off a 6HC. I switched to an mains bed heater / SSR combo. Wired SSR trigger to out3. Mains bed had an internal thermistor and I installed a thermistor within the build plate also. Hot end has PT1000.

      temp0 is build plate, temp1 bed heater, temp2 is hot end. I verified wiring was not crossed at connectors and was accurate to ports as in config file. Reread wikis and gcode dictionary. Everything looks like it should work in config file but the issue persists. Hot end temperatures rise correctly in DWC and on Paneldue when setting temps. Build plate temps also rise correctly (and internal thermistor on bed heater shows higher temps compared to build plate as expected). Print cooling fan control works normally.

      Help me 😵🔨

      Running firmware 3.4.1

      EDIT - swapping positions / reconfig of internal bed heater thermistor to temp2 and HE pt1000 to temp1 resolved the issue. I haven't read the change logs for newer firmware but is this a bug? Is this expected behavior for some reason? Or do I have a typo that I keep missing..

      
; General preferences

M575 P1 S1 B57600                            ; enable support for PanelDue
G90                                          ; send absolute coordinates...
M83                                          ; ...but relative extruder moves
M550 P"My Printer"                           ; set printer name


;Variables

if exists(global.xMax)
	set global.xMax = 360
else
	global xMax = 360                            ; Set xMax = max X range mm

if exists(global.yMax)
	set global.yMax =360
else
	global yMax = 360                            ; Set yMax = max Y range mm

if exists(global.zMax)
	set global.zMax = 360
else
	global zMax = 360                            ; Set zMax = max Z range mm 

if exists(global.probeXoffset)
	set global.probeXoffset = -44.4
else
	global probeXoffset = -44.4                  ; Set Probe offset X axis (negative means closer to origin)

if exists (global.probeYoffset)
	set global.probeYoffset = - 6.4
else
	global probeYoffset = -6.4                   ; Set probe offset Y axis (negative means closer to origin)

if exists (global.probeZoffset)
	;set global.probeZoffset = 0.70              ;Z offset for mk6 nozzle
	set global.probeZoffset = 1.42               ;Z offset for diamond nozzle
else
	;global probeZoffset = 0.70                  ;z OFFSET FOR mk6 nozzle Set probe offset Z axis (nozzle is this much lower than trigger level of probe)
	global probeZoffset = 1.42                  ;z OFFSET FOR diamond nozzle Set probe offset Z axis (nozzle is this much lower than trigger level of probe)

if exists (global.T0Preheat)
	set global.T0Preheat = 0
else
	global T0Preheat = 0                     

if exists (global.bedPreheat)
	set global.bedPreheat = 0
else
	global bedPreheat = 0                      



; Network

M552 P192.168.1.69 S1                        ; enable network and set IP address
M553 P255.255.255.0                          ; set netmask
M554 P192.168.1.254                          ; set gateway
M586 P0 S1                                   ; enable HTTP
M586 P1 S0                                   ; disable FTP
M586 P2 S0                                   ; disable Telnet


; Drives

M569 P0.0 S0                                           ; X physical drive 0.0 goes backwards
M569 P0.1 S0                                           ; Y physical drive 0.1 goes backwards
M569 P0.2 S1                                           ; Ztop physical drive 0.2 goes forwards
M569 P0.3 S1                                           ; Zright physical drive 0.3 goes forwards
M569 P0.4 S1                                           ; Zleft physical drive 0.4 goes forwards
M569 P0.5 S1                                           ; E1 physical drive 0.5 goes forwards
M584 X0.0 Y0.1 Z0.2:0.3:0.4 E0.5                       ; set drive mapping

M350 X16 Y16 Z16 E16 I1                                ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z1600.00 E415                        ; set steps per mm
M566 X600.00 Y600.00 Z30.00 E300.00                    ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z500.00 E6000.00                ; set maximum speeds (mm/min)
M201 X1500.00 Y1500.00 Z100.00 E1500.00                ; set accelerations (mm/s^2)
M906 X700 Y700 Z700 E650 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 X{global.xMax} Y{global.yMax} Z{global.zMax} S0   ; set axis maxima


; Endstops - Sets axis XY origin 0,0 to front left corner
 
M574 X2 S1 P"io1.in"                         ; configure switch-type (e.g. microswitch) endstop for high end on X via pin io1.in
M574 Y2 S1 P"io2.in"                         ; configure switch-type (e.g. microswitch) endstop for high end on Y via pin io2.in


; Z-Probe

M950 S0 C"io4.out"                                                                 ; create servo pin 0 for BLTouch
M558 P9 C"io4.in" H5 F500:200 A4 T5000                                              ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X{global.probeXoffset} Y{global.probeYoffset} Z{global.probeZoffset}      ; set Z probe trigger value, offset and trigger height
M557 X45:315 Y45:315 S27                                                           ; define mesh grid


; Heaters

;Bed w/ thermistor inside build plate
M308 S0 P"temp0" Y"thermistor" A"Build Plate" T100000 B4092 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out3" Q10 T0                                      ; create bed heater output on out0 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

;Bed heater max from internal thermistor
M308 S1 P"temp1" Y"thermistor" A"Bed Heater" T100000 B4092 ; configure sensor 1 as thermistor on pin temp1
M143 H0 S150 T1 A3                                         ; configure maximum temperature for heater 0, 150 degrees using sensor 1, shut down printer

;Hotend 1
M308 S2 P"temp2" Y"pt1000" A"Hot End"                 ; configure sensor 2 as thermistor on pin temp2
M950 H1 C"out1" T2                           ; create nozzle heater output on out1 and map it to sensor 2
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


; Bed adjustment screw locations

;;; replace these w/bed pivot pts by nozzle position
;M671 X328.4:28.4:28.4:328.4 Y54.1:54.1:314.1:314.1 P0.7                    ; mark leveling screws


; Fans

M950 F0 C"out7" Q100                          ; create fan 0 on pin out7 and set its frequency
M106 P0 C"PrintCooling" S0                    ; set fan 0 name and value. Thermostatic control is turned off
M950 F1 C"out8" Q100                          ; create fan 1 on pin out8 and set its frequency
M106 P1 C"Heatsink" S.85 H1 T40               ; set fan 1 name and value. Thermostatic control is turned on for Heater 1

; Tools

M563 S"HotEnd" 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


; Miscellaneous
M950 D1 C"spi.cs0+spi.cs2"                   ; enable Panel Due SD card 
M501                                         ; load saved parameters from non-volatile memory
M572 D0 S0.015                               ; set Pressure Advance
      o_lampeundefined A Former User? 2 Replies Last reply Reply Quote 0
      • o_lampeundefined
        o_lampe @A Former User
        last edited by

        This post is deleted!
        1 Reply Last reply Reply Quote 0
        • A Former User?
          A Former User @A Former User
          last edited by

          So with fresh eyes I found the little error that is now obvious... when I was defining the thermostatic fan with

          M106 P1 C"Heatsink" S.85 H1 T40

          as stated in the gcode dictionary, the H parameter is supposed to be the sensor number and not a heater number.

          1 Reply Last reply Reply Quote 0
          • dc42undefined dc42 marked this topic as a question
          • dc42undefined dc42 has marked this topic as solved
          • First post
            Last post
          Unless otherwise noted, all forum content is licensed under CC-BY-SA