Dual color kit from RepRapPro - installation issues

In case it saves anyone else any pain, here's a list of the frustrations I hit while trying to install this and how I got around them:

0. I didn;t do this, but I should have - BEFORE you take everything apart to start upgrading, print out the replacement parts you need! See the instructions.

1. You need to replace the enclosure for the duet - so that you have more slots in the side to pass wires out through. This is not easy to do once everything is fixed in place. What I SHOULD have done is realised this early and removed the PSU/DUET assembly from the machine completely rather than trying to swap it in situ.

2. The wiring diagram leaves a lot to be desired, and in order to follow it you need to swap over some headers from the original cables to new ones. Luckily I had the right components around to do so. Refer to the photos rather than the wiring diagram!

3. I wanted to get my old single=nozzle head working first (since I hadn't yet printed out the replacement parts needed to be able to mount the new head). To be able to do this you need to use the old cable - the new ones have 4-way connectors rather than 6-way. What I actually did was cut off the old 6-way connector and replace with a 4-way, thinking I would then be able to easily switch heads in the future.

4. Loose connectors in the fan wiring loom were not making contact at the duet end. I had to take them out and bend them to make proper contact.

5. It's not clear from the wiring diagram (but is from the photos) that you need to use extruder0 and extruder 2 (no, it makes no sense to me either)

6. The example changes to config.g included changes to set the thermistor resistor to 4.7k but that made mine read -14 degrees - I commented the line out.

7. You need to create files tfree2.g, tpost2.g, tpre2,g in the sys directory

8. You can't put a T1 command in the config.g file - it won't work

That's about all I can remember at the moment!

Richard

Great info! I am half way through the upgrade. Next step is to sort out all the wiring.

Regarding config.g; What firmware are you using?

T1 should work OK in config.g provided that you place it at or near the end of the file, in particular after the M563 tool definition commands. But my recommendation is to always put tool selection commands in your start gcode, even for single-nozzle printing.

You may find some of my blog entry on DIY 2-nozzle conversion here [miscsolutions.wordpress.com] useful, in particular the sections on testing, slicing and printing.

---

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

I'm using 1.00a-dc42

I tried T1 right at the end of the config.g file. I'm basing my claim that it didn't work on the fact that the web interface extrude commands would move both extruders until I manually sent a T1 or T2 command.

; Configuration file for RepRap Ormerod 2
;
M111 S0 ; Debug off
M550 PMy RepRapPro Ormerod 2 ; Machine name (can be anything you like)
M551 Preprap ; Machine password (currently not used)
M540 P0xBE:0xEF:0xDE:0xAD:0xFE:0xED ; MAC Address
M552 P192.168.253.14 ; IP address
M553 P255.255.255.0 ; Netmask
M554 P192.168.253.1 ; Gateway
M555 P2 ; Set output to look like Marlin
G21 ; Work in millimetres
G90 ; Send absolute corrdinates...
M83 ; ...but relative extruder moves
M906 X800 Y1000 Z800 E1000 ; Set motor currents (mA)
;M305 P0 R4700 ; Set the heated bed thermistor series resistor to 4K7
M569 P0 S0 ; Reverse the X motor
M92 E430 ; Set extruder steps per mm
M558 P2 ; Use a modulated Z probe
G31 Z1.72 P590 ; Set the probe height and threshold
M557 P0 X55 Y0 ; Four...
M557 P1 X55 Y180 ; ...probe points...
M557 P2 X215 Y180 ; ...for bed...
M557 P3 X215 Y0 ; ...levelling
;xy
;M556 S78 X0 Y-1.0 Z-1.25 ; Put your axis compensation here
M201 X500 Y500 Z15 E500 ; Accelerations (mm/s^2)
M203 X15000 Y15000 Z100 E3600 ; Maximum speeds (mm/min)
M566 X1200 Y1200 Z30 E1200 ; Minimum speeds mm/minute
; Two extruders
M563 P127 H1 D0:1:2:3:4 ; Tool 127 allows the web interface to control all drives and heaters
;M305 P1 R4700 ; Set the first hot end thermistor series resistor to 4K7
M305 P2 R4700 ; Set the second hot end thermistor series resistor to 4K7
M563 P1 D0 H1 ; Define tool 1
G10 P1 S-273 R-273 ; Set tool 1 operating and standby temperatures
M563 P2 D1 H2 ; Define tool 2
G10 P2 X19 S-273 R-273 ; Set tool 2 temperatures, and X offset from the first nozzle tip
;
T1
; End of config.g

Richard

OK so getting mine commissioned finally, and just struck an interesting one. You mention having to change some of the original looms.

In particular was this for the IR probe? I keep noticing the colour codes are different to what it was on the old setup, but in the pictures it almost looks like a new loom (not one short and one long).

I am using DC42's modulated probe, and I am pretty sure it was this sneaky switch (unmentioned in the documentation) of the loom that is causing me issues.

Regarding connecting DC42's modulating Z-Probe I have recently wired it up to the Duet Shield. (The dual color upgrade kit).

I have reused the original wires and just added the needed wires. So the wire coloring do not match the reprap installation instructins nor DC42's blog post on installing the the Z-Probe.

With help from DC42 I now have it the probe and termistors working.

Using the name of the connections on the board disregarding the coloring, should be like this:

Z-Probe Markings Duet Shield Markings
---------------------------------------------------------------------------
+ 3.3 +
GND G
OUT S
IN T

Yeah I woke in the middle of the night and decided to probe it out and came to the same conclusion with wiring.

And it is probing like a champ, just need to lower the X Probe stop and I will be ready to start some of this dual extruding stuff.

Really glad I didnt kill my DC42 Probe, but think I will have to get another when Dave gets another batch underway.