Connecting an expansion board - duet 3

mattbaker

This is my config.g file

; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Thu Jan 23 2020 12:19:31 GMT+1100 (AEDT)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Duet 3" ; set printer name

M667 S1 ; select CoreXY mode

; Drives
M569 P0.0 S0 ; physical drive 0.0 goes forwards
M569 P0.1 S0 ; physical drive 0.1 goes forwards
M569 P0.2 S1 ; physical drive 0.2 goes backwards
M569 P0.3 S1
M569 P0.4 S1
M569 P0.5 S0 ; physical drive 0.5 goes forwards
M569 P1.0 S0 ; physical drive 1.0 goes forwards

M584 X0.0 Y0.1 Z0.2:0.3:0.4 E0.5:1.0 ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E3000.00:3000.00 ; set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00:120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00:250.00 ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1500 E500:500 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

M671 X480.00:230.00:-10.00 Y440.00:-30.00:440 S100

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X450 Y450 Z550 S0 ; set axis maxima

; Endstops
M574 X1 S1 P"io0.in" ; configure active-high endstop for low end on X via pin io0.in
M574 Y1 S1 P"io1.in" ; configure active-high endstop for low end on Y via pin io2.in

; Z-Probe
M574 Z1 S2
M558 P5 C"io2.in" I1 H10 F200 T6000 ; set Z probe type to switch and the dive height + speeds
G31 P500 X40 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 X40:440 Y40:440 S80 ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M308 S1 P"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1 ; create nozzle heater output on out1 and map it to sensor 1
M143 H1 S280 ; set temperature limit for heater 1 to 280C
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit

; Fans
M950 F0 C"out3" Q500 ; create fan 0 on pin out3 and set its frequency
M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out4" Q500 ; create fan 1 on pin out4 and set its frequency
M106 P1 S1 H-1 ; set fan 1 value. Thermostatic control is turned off

; Tools
M563 P0 D0 H1 F-1 ; 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
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss

dc42

Is the LED on the expansion board flashing in sync with the one on the main board? If so then the cable is ok.

Have you set the address switches on the expansion board to address 1?

mattbaker

@dc42 I tried changing the switches , but no joy. I'll have to check the lights in the morning. Which ones should I be looking at? Colour etc?

mattbaker

@mattbaker If set to 0, would the drive number be P0.6 etc?

T3P3Tony

@mattbaker said in Connecting an expansion board - duet 3:

@mattbaker If set to 0, would the drive number be P0.6 etc?

The expansion board cannot be set to 0 in use (only to trigger a firmware update) in the configuration "0.n" refers to the mainboard.

deckingman

@mattbaker said in Connecting an expansion board - duet 3:

@dc42 I tried changing the switches , but no joy. I'll have to check the lights in the morning. Which ones should I be looking at? Colour etc?

There is red LED on the main that flashes at about 1Hz. There is also a red LED on the expansion board which should also flash in synchronisation with the LED on the main board.

mattbaker

@deckingman The red light on the board flashes quickly, faster than that of the duet 3.

Checked and adjusted the switches set to 1.

I have even bought some cat 5 and rj11 plugs, and a crimper.

Still get the same error messages

deckingman

@mattbaker I'd say that you probably need to do a reset of the board and possibly flash the firmware but I'll leave @dc42 to talk you through that procedure and/or suggest something else.

dc42

@mattbaker said in Connecting an expansion board - duet 3:

The red light on the board flashes quickly, faster than that of the duet 3.

If it's flashing continuously at about twice the speed of the main board, that means it isn't receiving CAN messages.

Only the two middle pins of the RJ11/RJ12 cables need to be connected. The colours must be in the same order at bot ends. Flat cables often have the colours reversed. Round cables normally don't and should be OK.

Make sure you have the two CAN termination jumpers fitted correctly on the expansion board.

mattbaker

Problem appears to be solved. I was using 6 pins, wired straight through. Then I read in another thread only the 4 middle were retired, I grabbed a 4 pin, and red lets flash in sync. And m122 b1 gives a response now.

However didn't realise using a 6 pin cable wouldn't work.

Thanks for your help.

dc42

I'm glad you got it working; but I think your 6-pin cable is faulty. The unused 4 pins on each CAN connector on the expansion board are connected to the same pins on the other connector, but not to anything else.

Flex3D

Dang... now i bought a short twisted adsl 2 cable for 6hc 1.0 and a 1.0 Extension Board.
I've to reorder a non twisted one now?

jay_s_uk

@Flex3D
Twisted is fine. It's crossed that you don't want. As long as the colours are in the same order at each end you'll be fine

Flex3D

@jay_s_uk thanks, so i'm fine with it. When i hold the endings together they are in the same order but twisted from one end to the other.

jay_s_uk

@Flex3D should be fine then

dc42

Twisted pair cables are what we recommend. It's the flat non-twisted cables that tend to have the pins swapped between the ends.

Danal

Note that a flat cable with RJ12 plugs on each end, with the same side 'up' on each end, DOES cross the center pins. Note the 3 to 4 and 4 to 3 below. This is a very common configuration for 'telephone' cables and will NOT work on the Duet CAN.

1      6
2      5
3======4
4======3
5      2
6      1