Topics created by jumpedwithbothfeet

@droftarts thanks for pointing me to the post, I didn’t think it was a possible firmware issue as it’s a new build and my other printer is on 3.5.1 and has had no issues, I’ve read through the post and yup it seems like the same problem, ironically since posting and moving the test print further out I’ve not had a fault, I will report if it happens again or try forcing the fault by printing closer to the pole.

I tried renaming the JSON file to no avail, changed a setting after and rebooted the board but it behaves the same, I’ll try deleting it and generating a new one.

@jumpedwithbothfeet G92 won't do what you want.

No difference with the cover off!

@deckingman Thanks for the confirmation hopefully I can start making some headway, I had already read through the tool changing manual but to be honest, as much as made sense, it also didn't, couple that with the meta guide which was even worse until I found the github reference page, and I was truly struggling! thankfully you have filled in the gaps enough to hopefully get me sorted.

Just a quick update if anyone stumbles across this thread - I've just completed my first successful print with a 6HC as an expansion board. The printer has XY and Z motors on a 3HC expansion board, U and V motors on a 6HC main board, and 6 extruders connected to a 6HC as an expansion board. The end stops for X U and Z are connected to the 6HC expansion board and these will stop the corresponding motors connected to other boards with no noticeable latency. The two hot end heaters and their corresponding thermistors are connected to the 6HC expansion board which all work as they should. The hot end liquid coolant pump is connected to the 6HC main board but works thermostatically with the sensor that is connected to the 6HC expansion board. So everything appears to be communicating with everything else as it should. This latest firmware update had to be done via Bossa/USB but from now on, all future firmware updates should work over CAN.

In summary, this being the first use of a 6HC as an expansion board "in anger", some glitches and issues were to be expected but these have all now been resolved (at least for my particular machine). I will continue to monitor and report back anything to the Duet guys.

@dc42 nothing of note I don't think... I have just started the printer to get this and the heater is active this time so it does appear intermittant.

; config-override.g file generated in response to M500 at 2021-10-19 18:55 ; This is a system-generated file - do not edit ; Heater model parameters M307 H0 R0.224 C452.715:452.715 D7.32 S1.00 V24.1 B0 I0 M307 H1 R1.917 C230.500:230.500 D4.60 S1.00 V24.3 B0 I0 ; Workplace coordinates G10 L2 P1 X0.00 Y0.00 Z0.00 G10 L2 P2 X0.00 Y0.00 Z0.00 G10 L2 P3 X0.00 Y0.00 Z0.00 G10 L2 P4 X0.00 Y0.00 Z0.00 G10 L2 P5 X0.00 Y0.00 Z0.00 G10 L2 P6 X0.00 Y0.00 Z0.00 G10 L2 P7 X0.00 Y0.00 Z0.00 G10 L2 P8 X0.00 Y0.00 Z0.00 G10 L2 P9 X0.00 Y0.00 Z0.00

@jumpedwithbothfeet Jim, thanks for letting me know!

@phaedrux, After multiple attempts with both black and white paper including a comical poor chase the hot end around with the paper, I resorted to using just the bare unpolished aluminium bed, pretty much proof the glass bed is causing the sensor a head ache the two blue areas are chamfered screw holes I believe.

M556 Z60 M201 Z200 bare plate.png

I have ordered some Lokbuild to replace the kapton tape.

@jay_s_uk
@Phaedrux
@dc42

Thankyou all for your help and for educating me 🙂

I've added some notes to the Duet3 documentation on powering the SBC. When in doubt, power it separately.

https://duet3d.dozuki.com/Wiki/Duet_3_Mainboard_6HC_Hardware_Overview?revisionid=HEAD#Section_Electronics_power_consumption

@Phaedrux thanks I’ll take a look see if I can source in the uk.

@PaulHew its Finally printing! It’s the worst 20mm calibration cube that’s ever been made but it’s printing!, It still needs the z height sorting as a lot of baby stepping was needed and the nozzle has also grazed the glass bed, the x axis and extruded steppers are also running hotter than I would like so I’ll reduce the current some more, and then start more calibration I guess!

@Phaedrux i think it did it, i ran M115 again and got this -
M115
FIRMWARE_NAME: RepRapFirmware for Duet 3 MB6HC FIRMWARE_VERSION: 3.01-RC6 ELECTRONICS: Duet 3 MB6HC v0.6 or 1.0 FIRMWARE_DATE: 2020-04-03b3

hopefully this will help solve some issues, thank you for your help its much appreciated

I have re-checked the VIN connections as suggested and also repositioned the board and added separate wires from the PSU to the bed heater VIN, I have also ordered new larger diameter wires to be on the safe side and future proof myself!

I have re-checked all wiring for shorts and continuity and instead of posting a dozen bad pictures I've listed the connections I've made instead -

VIN +/- = 24v PSU terminals
Bed heater VIN +/- = 24v PSU terminals
Out0 = to bed heater insuring the polarity is reversed as per the board

Driver wiring as per original (outer wires direct with inner wires swapped over at the stepper motor plug, all re-crimped/soldered with extra insulation.
Driver 0 = X stepper motor
Driver 1 = Y stepper motor
Driver 2 = Z stepper motor
Driver 3 = Extruder motor

Out 1 = Nozzle heater wiring same order as the it was removed from original board
Out 4 =

GND - Hot end fan NEG wire
V_outlc1 - Hot end fan POS wire

Out 5 = same as Out 4 but for part cooling fan

Temp_0 = Hot end thermistor wiring same order as the it was removed from original board
Temp_1 = Bed thermistor matching Temp_0

IO_4 = X axis end stop

GND - Signal
IO4.in - Voltage

IO_5 = Y axis end stop matching IO_4

IO_7 = BLTouch V3.1

IO7.in - white wire
GND - Black+Blue wire
IO7.out - Yellow wire
5v_ext = Red wire

SBC connector - RPI3B+ ribbon cable oriented the correct way.

Sorry for the long post I have gone through as many of the guides and posts as possible, I just want to do everything right and not miss anything!

Thanks again for your input 🙂