Many thanks, I will run these formulas today.

I think I will try them both on current 1.2mm nozzle as well as a 0.8mm

I really appreciate you detailed input and advice!

Thank you very much!

So I Upped the max extruder speed and was able to achieve much greater speeds.

I did find that at just 30mm per sec, the extruder started to grind at the filament.

I don’t think that the standard heater cartridge and hot ended can deal with this kind of volume.
You mentioned making use of a smaller nozzle, I wondered if you had any advice for my current setup? Can I do anything to increase amount of flow
I did experiment with various temps, but again, at 30mm it starts to battle to keep up.

For now I am going to fit a smaller 0.8mm nozzle.

I really just have the Aero on to see what this build can do.

I will soon be fitting a pellet extruder.

@deckingman

Thank you for that!
Very helpful! And makes perfect sense!

Have a super volcano on order as I suspect I will run into problems trying to keep up with the flow.

@deckingman
Hi, 1st attempt was at 1mm
2,3rd and 4th attempt at 0.8mm

Hi there,

I have fitted a Duet Wifi to a home built Printer, she is finally operational, i yesterday did my first print, as can be expected there is still a fair amount of challenges and tweaking that lie ahead.

Machine Info:

2m X 2m X 2m Volume.

NEMA 34;s and 20mm (2005) Ball screws used-1 for X, 2 for Y and 4 for Z.
External 7.8A Drivers used for X, Y and Z. (Via Duet Break out board)
Each stepper on its own driver.
Titan Aero Extruder with Nema 17 stepper fed via E0 on duet. Volcano 1.2mm Nozzle.
48Volt supply to external drivers.
24V Volt supply to Duet and Extruder.
Using S3D

Operator, still a newbie but have been printing for about 6 years with great results;ts, this is however my first large scale printer, and also my first time using external drivers and Duet equipment.

There are 2 items that I'm hoping i could get some advice on:

The first is, Speed.

In S3D, my print speed is set to 60mm/s, in my config.g speeds are set to 2.6m/min for X and 3m/min for Y, yet when printing small or large model max speed I can achieve is 11.4mm/sec.
I up the speed to 200% on the Due but it stays at 11.4mm/sec.
Cant help but feel that i have missed something in my Config.g

2nd issue is extrusion, i admit that my bed leveling and offsets are not yet perfected, but the extruder-every 20-25mm seems to briefly slow down, the result is a rather inconsistant flow.

If anyone that is able to assist is prepared to review my settings and check out my pics, I would be very grateful.


My Config File is as follows:

; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Thu Mar 28 2019 12:12:45 GMT+0200 (SAST)

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

; Network
M550 PDarnz Does 2m2 ; Set machine name
M552 S1 ; Enable network
M587 S"Darnz Wharehouse" P"Darnial#89" ; Configure access point. You can delete this line once connected
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M569 P8 S1 R1 T4:4:5:0 ; Drive 0 goes forwards for X
M569 P7 S1 R1 T4:4:5:0 ; Drive 1 goes forwards for Y
M569 P5 S0 R1 T4:4:5:0 ; Drive 2 goes backwards for Z1+2
M569 P6 S0 R1 T4:4:5:0 ; Drive 3 goes backwards for z 3+4
M569 P3 S0 R1 ; Drive Goes Backward for E0
M584 X8 Y7 Z5:6 E3 ; Apply custom drive mapping
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X80 Y80 Z80 E400 ; Set steps per mm
M566 X2500 Y2500 Z1200 E1200 ; Set maximum instantaneous speed changes (mm/min)
M203 X2600 Y3000 Z600 E400 ; Set maximum speeds (mm/min)
M201 X100 Y100 Z500 E250 ; Set accelerations (mm/s^2)
M906 X800 Y800 Z800 E1200 ; Set motor currents (mA)
M84 S0 ; Disable motor idle current reduction

; Axis Limits
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X1800 Y1800 Z1800 S0 ; Set axis maxima

; Endstops
M574 X1 Y1 S1 ; Set active high endstops

; Z-Probe
M574 Z1 S2 ; Set endstops controlled by probe
M307 H7 A-1 C-1 D-1 ; Disable heater on PWM channel for BLTouch
M558 P5 H10 F300 T6000 ; Set Z probe type to bltouch and the dive height + speeds
G31 P25 X-44 Y0 Z2 ; Set Z probe trigger value, offset and trigger height
M557 X15:1835 Y15:1835 S600 ; Define mesh grid

; Heaters
M140 H-1 ; Disable heated bed
M305 P1 B4725 C7.060000e-8 ; Set thermistor + ADC parameters for heater 1
M143 H1 S280 ; Set temperature limit for heater 1 to 280C

; Fans
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

; 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 power saving
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

; Custom settings are not configured

; Miscellaneous
M501 ; Load saved parameters from non-volatile memory

Many thanks, I’m using 48V for external drivers.

But will tweak acceleration settings and see if any improvement.

Hi, just reading through various posts in an effort to learn more about this.

There are. Or many people that are knowledgeable in this regard so I’m taking a chance her, could you pls give me some advise.

I am also making use of external drivers(DQ860MA) and Nema 34 Steppers, directly coupled to 20-05 ball skrew.

I, after a few hours of playing around got the drivers correctly related via the Breakout board.

I now have motion and end stops working but am only able to achieve about 2m/min where I was hoping for 3.5.

If I set speeds to go any faster the motors start but when near point of full speed suddenly stop dead, it’s atvthis point that I high pitches and loud noise can be heard.

Pulse rev on external driver currently set to 800.

Do you think I can improve on speeds with changes to firmware or am I going to have to replace ball screws to 20/10?

Thank you for your response.

Could I make use of expansion plug pins for my XY and Z?

So useE2 for my X
Use E3 for my Y
And use E4 for my Z.

Do you think I may have a problem with one pin feeding signal to upto4 drivers?

Hi,

Hoping someone may assist me.

I am building a large scale Cartesian Printer(2000mm/2000mm/2000mm).

Ball skrews being used for all axes-20mm.

Same Nema 34’s and DQ860MA External drivers being used for X(1 of), Y(2 of), and Z(4 of).

The Duet WiFi will be on a 24V PSU

The external drivers are being supplied from a 48Volt PSU.

The decision was only recently made to make use of a Duet WiFi board, but I failed to research enough as I see now that external drivers require 5V and the Duet provides 3v.

My concerns at this point are as follows:

(1) Will the 3v signal from the board be sufficient to run the external drivers? Keep in mind that Z axis for example has 4 drivers that will need to be controlled from the Duet.

(2)If so, how are they connected ?

(3) Can the connections be made directly to the expansion plug on the Duet WiFi.