Solved hotend fan on only when hotend stop heating
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hallo,
i have an duet wifi with firmware 3.2.2
the hotend fan start start with t50 (P1 S255 H1 T50 ) but the fan ia only on after the nozzle has the target temperatur and stop heating. than the fan start and stop 2x and is off until i stop heating the hotend. after stop heating the fan blow until the temperatur is unter 50 degres. here is the config; 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 Apr 06 2021 13:37:44 GMT+0200 (Mitteleuropäische Sommerzeit); General preferences
M80
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"X-Plus" ; set printer name; 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 Z2:4 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X94.12 Y94.12 Z400.00 E420.00 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E180.00 ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z180.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E1000 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 X270 Y200 Z200 S0 ; set axis maxima; Endstops
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+!e1stop" ; 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 Y15:195 S20 ; define mesh grid; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4100 ; 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 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" Q65535 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S255 H1 T50 ; 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; Custom settings are not defined
; Miscellaneous
M501 ; load saved parameters from non-volatile memory -
@joeko said in hotend fan on only when hotend stop heating:
M950 F1 C"fan1" Q65535 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S255 H1 T50 ; set fan 1 value. Thermostatic control is turned onWhy did you use this extreme high PWM Frequency?
Have you tried to use the fan with using the B parameter in your M106 command? -
@siam said in hotend fan on only when hotend stop heating:
@joeko said in hotend fan on only when hotend stop heating:
M950 F1 C"fan1" Q65535 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S255 H1 T50 ; set fan 1 value. Thermostatic control is turned onWhy did you use this extreme high PWM Frequency?
Have you tried to use the fan with using the B parameter in your M106 command?this is only for testing.
also with other frequencys. i started wih 500 and now with 100.
with b i will test now. for testing i also use an other fan with little bit better result. but also, after heating the fanspeed goes to 100% -
ok, it is also a fan problem. the board has to go higher with the pwm for the fan but what i set in the config is has not the effect. the 5010 radial fan work like it has to but the 40x10 fan not really. where i have to set the minimum pwm ? i have tried it with L but no effect.
and also, after stop heating the fan runs with 100% but only after stop heating
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is it not possible that the fan run on 100% after reach the target temperatur ?
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@joeko Your problem is somehow strange. Your settings are correct so far i can see. The fan should switch on at 50 C° with 100% Speed. Does this happen too when you manually heat the hotend over the web interface?
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@siam said in hotend fan on only when hotend stop heating:
@joeko Your problem is somehow strange. Your settings are correct so far i can see. The fan should switch on at 50 C° with 100% Speed. Does this happen too when you manually heat the hotend over the web interface?
yes also over the web.
but first it is the fan. the fan has problems with pwm. a 5015 radialfan runs like it has to. because i dont have a second 40x10 24v fan here i use a step down to create 12v and connect the plus to fan plus and negativ to the duet and this works perfect.but of course, why is there a problem with the first 40x10 24v fan ?
on 24v he runs really well. -
@joeko There are fans who cannot cope with the PWM signal
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How is your wiring routed? It's odd that the fan doesn't work when the heater is heating.
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it is a little bit cracy.
i have connected a 12v sunon with the step down to the duet. it seems all is good. than i have connected the fan to the hotend (with step down) and i get problems. the power supply hum, the voltage goes down to 23,3v from 24.1v and the fan is off. than hum stops, fan is on and voltage is 24.1v and so on -
Can you show a diagram of how you have things connected? The Duet switches PWM on the negative side, so it can't be shared.
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@phaedrux said in hotend fan on only when hotend stop heating:
Can you show a diagram of how you have things connected? The Duet switches PWM on the negative side, so it can't be shared.
hmm, a photo or a diagram ?
i will do it later today. why drops the power from 24.1v to 23.3v of the meanvell powersupply ? the step down make the meanvel huming for the fan but driving an odroid sbc doesnt make problems ? but the negativ pol off the fan isnt shared -
i have checked the wiring again.
it stays that fan is sensible if the current drops and the curent drops when i heat up the nozzle. when i connect the fan to always on and heat the nozzle is it the same. the fan stop spinning until heating has stoped. in web control it looks like the voltage drop to 23,8v but is this too much ? -
@joeko if a power supply drops the voltage it can (not must) be a sign that your Printer consumes to much power. How much Watt can your power supply deliver? Is your heating bed connected to this power supply if yes how much Watt it needs? What for hotend heater you use (watt)?
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@siam said in hotend fan on only when hotend stop heating:
@joeko if a power supply drops the voltage it can (not must) be a sign that your Printer consumes to much power. How much Watt can your power supply deliver? Is your heating bed connected to this power supply if yes how much Watt it needs? What for hotend heater you use (watt)?
the power suppy has 350w. a meanvell. the bed is connected (without ssr) to the power supply this all happen with bed heater off. the hotend is an e3d with 40w and 24v.
but a 350w power supply is not enough for the duet, one fan and the 40w e3d hotend ? that the fan is sensible for current droping is ok but it is normal that the current drops when i heat the nozzle ?
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@joeko if you only power up the hotend + fan + steppers the power supply should not drop the voltage.
What happens when you heat up the hotend and the heating bed at the same time is the voltage then stable on 23.3 Volts or is the drop bigger ? -
@siam said in hotend fan on only when hotend stop heating:
@joeko if you only power up the hotend + fan + steppers the power supply should not drop the voltage.
What happens when you heat up the hotend and the heating bed at the same time is the voltage then stable on 23.3 Volts or is the drop bigger ?when i heat up the bed and nozzle at the same time (but than the board heat first the nozzle and than the bed) the voltage drop to 23.8v and not deeper. droping to 23.3v was only yesterday as i connected an 12v hotendfan with an step down modul. than the power supply was huming and the voltage droped to 23.3v. and again now, stop heating the nozzle (with an other 40x10 24v fan) than the fan speed goes higher
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hello,
strange, i replaced the fan and made an test. than the 1a fuse ploped and was broken. also the nozzle became hotter and hotter. but after restart the printer the fans stil running without the fuse .....is the 1a fuse not for the fans ? also as i connected a 12v fan with an stepdown converter the current of the power supply droped to 22v and the stepdown modul became hot. later i connected an fan to fan2 without config the config settings and from the fan2 connector on the boards i saw short lightning. how is it possible that the fans running (also always on) without the 1a fuse ? -
@phaedrux said in hotend fan on only when hotend stop heating:
Can you show a diagram of how you have things connected?
Or a photo?
What PCB version of Duet do you have? There should be a number silk screened onto the board.
Which fuse blew?
If something is blowing I think you have a short somewhere and should be very careful about blowing the whole board. Take it all apart and slowly put it back together testing as you go.
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@phaedrux said in hotend fan on only when hotend stop heating:
@phaedrux said in hotend fan on only when hotend stop heating:
Can you show a diagram of how you have things connected?
Or a photo?
What PCB version of Duet do you have? There should be a number silk screened onto the board.
this is an clone....first time i own an clone and than this....
but i ordered today an genue duet3 mini 5. the 1 ampere fuse blew
