Posts made by facet

@CCS86 unfortunatelly I don't have any upgrade on this topic - maybe the colleague was able to figure out some settings meanwhile...

New year - old challenge Happy new year!
Are there any new insights on anyone at this topic?

I also saw the first YT videos where the BAMBULAB printers have VFAs...

Regards,
facet

@droftarts Hi! I just wanted to ask nicely if there are any new results or thoughts on this optimizations?!

@droftarts you are right ofcourse - but like I say'd I changed already every little bit of the printer and nothing had so much effect to get rid of it. Mostly VFA will come from mechanical issues, but if there is nothing anymore to optimize this will lead to TMC and NEMA.
I guess the people out there get now more and more aware of how to correctly setup their printers while this VFA discussion is getting more popular everywhere.
I spent now 2 years to exchange everything on my printer, genuine GATES pulleys and belt, EZO Japan bearings, CPC / HIWIN Rails, total square aluminium topplate cnc milled and drilled where the rails are mounted, and new electronics.
Tried different extruders (dual gear and single) and also had a look at vibrations from hotend-fan or BTLs.

So i guess I am really at the end here what you are recommending and want to got as deep as possible into that rabbit hole now.
If the PRIORIFI Nema would not be so expensive in comparsion how the marketing is... but maybe there will be more and better experience reports soon.

Really appreciate your effort here.

Regards
facet

@droftarts Wow that sounds great!
But to get me right: i have a duet wifi! But the VFA i had also with RAMPS & TMC2208, 2130 and 2100 before i tried out the duet (and stayed )

So i think, the tuning can be somehow a general topic for TMC / NEMA17. But I really would try out the mentioned settings if applicable within the duet firmware setting commands - maybe some bindings are not existing here until now?!

If you could point out which ones are making the difference in your opinion, some ranges can be tested by ourself then. If there are not too many different variables and combinations ofcourse

Regards
facet

@phaedrux Hi, thanks for the quick reply. Ah yes ofcourse this are two different types of drivers - but I thought maybe there is a way that somebody who is really in this topic can adapt this regardingly or find out what setting combination especially makes the difference (independent which 22X driver model) ?!

I thought it's worth a try...

Regards
facet

Dear ladies and gentlemen,

i am fighting VFAs since years now with my printer - changed every bit but never completely erased them.
While this topic is now getting more attention everywhere, also within hardware resellers and manufacturers (LDO, PRIORIFI, ...) i wanted to highlight some settings from a user who uses klipper:
link
So this is what i always thought but never be capable (time and technical understanding) to really proof but in my opinion this is mostly it! Nema in combination with TMCs.
Ofcourse there can be many other mechanical issues be in parallel but maybe somebode here can now help to translate this settings into a M569 command who is better in this.

I can hardly interprete here everything but maybe it is worth a try! Also when I think of the many unsolved VFA threads in here...

Regards
facet

Yeah, thank you. I disconnected the E1 cables and now the LED is off and the Chamber fan works as supposed...
Only thing is, if i meassure output from E1 when deactivated my DM shows ~10MV. On E0 nothing (0,00).

I am going through my wiring and keep you updated

Thanks.

BR
facet

Ok, now it is getting strange.
After i changed yesterday the mosfet and without connecting any cables the LED was going on and off with my macro.
Now after wiring up everything the LED from E1 is always on and i am meassuring 15,4V output on E1. After i enable E1 i get the full 24V.

So i think i messed up something else with changing the mosfet?!

Also now the chamber fan goes on when i activate E1 (Leds). So i added my config - but strange because this was working before.
Without SD Cards the E1 LED also in on, so i think something is broken.

BR
facet

CONFIG:
; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2 on Sun Jul 07 2019 17:41:47 GMT+0200 (Mitteleuropäische Sommerzeit)

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

M667 S1 ; Select CoreXY mode

; Network
-deleted-

; Drives
M569 P0 S1 F8 Y03:00 ; Y01:02 Physical drive 0 goes forwards F8 Y03:00
M569 P1 S1 F8 Y03:00 ; Physical drive 1 goes forwards
M569 P2 S1 F8 Y03:00 ; Physical drive 2 goes forwards
M569 P3 S1 F8 Y03:00 ; Physical drive 3 goes forwards
M569 P4 S1 F8 Y03:00 ; Physical drive 4 goes forwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X160 Y160 Z802.00 E405.00 ; steps per mm (bei 128 Steps 644 644)
M566 X1200.00 Y1200.00 Z12.00 E120 ; Set maximum instantaneous speed changes (mm/min) XY900 E120.00
M203 X36000.00 Y36000.00 Z900.00 E3000.00 ; Set maximum speeds (mm/min)
M201 X3000.00 Y3000.00 Z120.00 E4000.00 ; Set accelerations (mm/s^2)
M906 X700.00 Y700.00 Z550.00 E1000.00 I5 ; 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 X245 Y230 Z240 S0 ; Set axis maxima

; Endstops
M574 X1 Y1 S0 ; Set active low and disabled endstops
M574 Z1 S1 ; Set active high endstops

; Z-Probe
M558 P0 H5 F120 T1800 ; Disable Z probe but set dive height, probe speed and travel speed
M557 X15:200 Y15:195 S20 ; Define mesh grid

; Heaters
M305 P0 T100000 B4725 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S125 ; Set temperature limit for heater 0 to 125C
M305 P1 T100000 B4725 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S270 ; Set temperature limit for heater 1 to 270C
M307 H1 A379.3, C142.5, D8.5 V24.0 B0
; Chamber Thermistor
M141 H3 ; heater 3 is the chamber heater
M305 P3 X2 R4700 T100000 B3950 ; heater 3 is monitored by a thermistor

;LED Strip on E1
M307 H2 A-1 C-1 D-1 ; Disable heater on the pin

; Fans
M106 P1 S1 I0 F500 H1 T50 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H3 T30 ;Chamber Fan controller by H3 thermistor

; Tools
M563 P0 D0 H1 ; 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

; Automatic saving after power loss is not enabled

; Custom settings are not configured

Thank you.
So wired everything again and now E1 is on again all the time. Omg..
Good thing is, i ordered 5 spare mosfets...

Changing TR8 Mosfet did the trick... now i can switch E1 again on and off.
This was a tricky one, used my heating gun with a small adapter (8mm) the first time for soldering and re-used a heatsink metal sheet from a defect DDR2 RAM to protect the other stuff on the duet around the mosfet (slightly modified )

So thank you very much for the help!
Last question: Why can this happen because i thought because of the fuses that a short on E1/E0 is not causing an issue?! - nevertheless i was not careless but not concentrated enough.

BR
facet

Hi,

So i will disconnect the LED strips from E1 and can continue printing (if i got it right with disconnect the heater you mean the LED strip from E1 which is used for) meanwhile the spareparts arrive.
But first i need to check which one is damaged...

Thank you!

BR
facet

P.S.: My first Thread in this forum, long time just reading. I am impressed with the response time, amazing!

Thank you very much.
Can anything else get damage while using the Duet in this state till the new mosfets arrive?

BR
facet

Thank you for the fast answer!
It is going on with and without SD card!
So makes this a difference??

I will check how to meassure the mosfest and dont burn anything else additionally..

BR
facet

Hello Guys,

i have a DUET 2 WIFI ("Duet WiFi 1.02 or later") and i am using the second extruder heater port to light my case with 24V LED stripes.

Since there was a possible short while on (meassuring...) now i cannot dissable the extruder heater port anymore - It is always on.
I already tried to boot without SD and hit the reset button.
The fuses are all ok, so i thought maybe they burn up when a short in E0 or E1 happens.

So is the MOSFET gone or can there be anything else (how to find out? axis are all moving) ?
Which one is to replace for E1?

Thank you.

Best regards
facet

P.S.:
Firmwarename: RepRapFirmware for Duet 2 WiFi/Ethernet
Firmware Elektronik: Duet WiFi 1.02 or later
Firmware Version: 2.02(RTOS) (2018-12-24b1)
WiFi Server Version: 1.22
Web Interface Version: 1.22.6

config.g for LED Strip like always working:
;LED Strip on E1
M307 H2 A-1 C-1 D-1 ; Disable heater on the pin