@tecno have you updated the firmware too?
try switching to tool 0

@wiego If your aim is to avoid damage, then perhaps calling "emergency stop" M112 would be the best action, I think that should stop the current movement?

@zapta said in Anybody wants a stepper motor analyzer?:

CC6920BSO

according to datasheet https://datasheet.lcsc.com/lcsc/2108201830_Cross-chip-CC6920BSO-20A_C2880432.pdf page 4 it is about 270 mV/A.

https://www.thingiverse.com/thing:5467974 - initial design, with a copy-pasted preamble from this forum post. Bill of materials, basic instructions and STL of basic tool dimensions is included.

@adamfilip you can already do that with either the P or S value in M557 (can't remember which).
You set the min and max probe points and then how many points you want in between. RRF does the rest.

Happy to update (click to see the GIF):
Deformation4.gif

Printing settings:

Polymaker ASA @240°c Bed at 75°c Chamber still heated up to ~50°c (It's passively heated by the giant bed, not much I can do to reduce it) Fan at 15% for the entire print, except the first 4 layers

Results:

Perfectly straight pulley teeth ❗ ❗ ❗ Slight deformation on the bottom pulley wall (touching the bed), I think I need to enable cooling there as well, just a bit.

I would like to thank everyone here for your help, it's been amazingly helpful to have so many experienced people chime in and help me improve my printer and my my understanding.

Though the main culprit turned out to be simply a overly hot print bed, I also improved the way I calibrate my printer and removed a different error I have had for years.

Special shoutout to @Norder and @alankilian! Thanks so much!

@adamfilip

my machine is similar to Voron 2.4 with 4 point gantry levelling and a fixed bed

This is the homing /Startup sequence

Home Z

G29 S2 ;DISABLE BED COMPENSATION if !move.axes[0].homed || !move.axes[1].homed ; If the printer hasn't been homed, home it M98 P"0:/sys/homexy.g" M561 ; clear any bed transform M290 S0 R0 ; clear baby steps G91 ; relative positioning G1 H2 Z6 F6000 ; lift Z relative to current position to clear any obstructions M400 G90 ; absolute positioning M401 P0 ; This runs macro file deployprobe G1 X150 Y190 F9000 ; go to center of bed in advance of probe that point M400 G30 ; Probe the bed at the current XY position. When the probe is triggered, Datum Z0 G1 Z10 ; raise Z=10 M400 G4 P500 M98 P"0:/sys/bed4point.g" ; tram gantry - Like G32 G1 X150 Y190 F9000 ; go to center of bed in advance of probe that point M400 G30 ;probe z point M402 P0 ; retract probe G1 Z10 F600 ; lift Z relative to current position G90 ; absolute positioning G29 S1 ;LOAD MESH COMPENSATION

4 Point Gantry levelling is also called and does this

M558 F800 A1 H15 ; fix probe speed to 3mm/s, Height 10mm G90 G4 P250 M561 ; Clear any bed transform G30 P0 X25 Y15 Z-99999 ; probe near a leadscrew G30 P1 X25 Y250 Z-99999 ; probe near a leadscrew G30 P2 X285 Y250 Z-99999 ; probe near a leadscrew G30 P3 X285 Y15 Z-99999 S4 ; probe near a leadscrew and calibrate 4 motors M558 F200 A2 H6 ; fix probe speed to 3mm/s, Height 10mm G30 P0 X25 Y15 Z-99999 ; probe near a leadscrew G30 P1 X25 Y250 Z-99999 ; probe near a leadscrew G30 P2 X285 Y250 Z-99999 ; probe near a leadscrew G30 P3 X285 Y15 Z-99999 S4 ; probe near a leadscrew and calibrate 4 motors M558 H10 F500 60 T9000 A1 S0.02 ; reset probe setting to normal

@timsworkshop

rafts are great when needed did you look around to see if you can mate a generic one up for the Hemera? show us a pic maybe we can help
try it with some fan on initially...

@dc42 @infiniteloop @Phaedrux

Following up:

The spare parts arrived yesterday and today I replaced just the hotend thermistor. That seems to have resolved the problem as I did about 6 hours of printing with no events. Yipee!

I remain unclear how a faulty hotend thermistor could have had consequential effects on the reported bed temperature as shown in the chart (from the original problem) so any celebrations might be premature, but no such problem today.

Chart 1 - hotend.png

When and where did you purchase your Duet?

@cncmaker said in another spurious heater issue:

m303 h1 s240

That's for tuning as a heater. M303 T0 S240 would tune it as a tool including the cooling fan.

@cncmaker said in another spurious heater issue:

I dont know if i should start a new thread but id like to ask you about another issue im having.

Yes best to create a new thread.

@tinchus one of the IO input pins should be fine. If it has A and B then it must have some sort of direction information.
You'll just need to set it up as a pulse type sensor

@rjenkinsgb
Hi Robert,
I too, have the Tronxy X5SA Pro 330 x 330 x 400 and purchased a Deut3 6HC over a year ago with a similar project in mind, albeit I was looking to make a manual quick release tool changer, with tool boards mounted with the extruders.
I've not used my printer in over a year, due to moving house and trying to get things sorted within the house before I distracted myself with recommissioning my printer.

I have no previous experience with any Duet boards, so in-doing something similar to your Frakentron is going to be quite a challenge.

Did you have any major problems to overcome with setting the Duet up on the Tronxy?

One thing I had previously looked at (before moving house), was the BLV project, where I liked the fact of the open front. I was contemplating rotating the frame around 180˚ (like you've done), but replacing the the 2 front upright 2020 for 4040, along with replacing the Y rails with 4040 and mgn rails.
When I saw your Frankentron, I was quite surprised you'd not consider the same.

Out of curiosity, what did it cost to get the Carriage plate cnc'd?
I might just copy your main outline and roller mountings from you and add my own fixing and fixtures when I know exactly how I'll be mounting my extruders (Hemera & MicroSwiss).

Do you know if there a rough limit on the length of cable from the duet to the steppers? I've placed my printer in a built-in cupboard that I've soundproofed, so i does get quite warm in there. I'm considering placing the controls outside of this cupboard about 1.5 to 2m away?

I think my main issue will be finding all the correct information about the Tronxy to transfer over to the Duet. I'm on a mac so I have to use repetier to find things like current esteps, but even that's not playing ball at the moment, so having to do it with the ‘sd card way’ is now pushing me to make the move over.

I'd be grateful for any advice you may have.

Regards,

Dizzwold.

or do you mean that ?
Duet 2: https://docs.duet3d.com/en/How_to_guides/Wiring_your_Duet_2#h-12-stepper-motors

Many thanks for your reply Tony.
It is understood that a new board, with the origininal configuration already ordered and not provided, will be suplied one more time when you have "reverted once supplies of the TQFP package become available" or, this your provisionaly proposed configuration, as it is version V1.02, comes to be an secure and guaranteed long term mainboard.
Please clarify.

If the PLA should be extra cooled right from the start, then write the M106 command in the Start-GCode of the filament.
And in the End-GCode there may be a pause to cool the filament even further after the end of the print until the G4 pause time has expired and then the M107 command comes as the last command to switch the fan off completely.

Google Translate
--- Original Text ---

Soll das PLA gleich von Anfang an extra gekühlt werden, dann schreibe den M106 Befehl in den Start GCode des Filaments.
Und im End GCode eventuell eine Pause um nach Ende des Druckes das Filament noch weiter zu kühlen bis die G4 Pausenzeit abgelaufen ist und dann als letztes der M107 Befehl kommt um den Lüfter komplett aus zu schalten.

why not just use the always on pins then? select vin for ps voltage or 12v to that pin set i think the plug is the same just move it over to it

@2500ccm the value of the pullup resistor is not critical. Did you connect the ground of your external 5V PSU to Duet ground?

@signpostman With the help of our internal developer, we got it work. to make it work. ON the RasPi, change file permissions on the wp_supplicant.conf file read & writeable by everyone. we then changed the "|" character to a "}". We then were able to connect.

ok much playing with but i got it Q ended up to be Q1.25 and the switching is just like the oem original now and only +/-.5c spread the R was set to R0.030 which auto tune suggested R0.027 was close but the D was suggested to D159 by auto tune and D28 worked best for me

thank you to all whom guided me here the D,R and Q was the issues i was having and is a ok now!

If you search the prusa slicer github you can find the discussion on the switch from reprap/sprinter to reprap flavor. Basically to adopt modern reprap syntax.