Posts made by TitanOne

@phaedrux said in Expansion header pinout?:

you mean like this? https://duet3d.dozuki.com/Wiki/Duet_Wiring_Diagrams

Yes, thank you.

(Damn it, my eyes AND my brain have failed me)

'Sup.

It's either my brain or my eyes, but I am unable to find the expansion header pinout of the Duet Wifi/Ethernet. Can somebody link it here please?

@compatibilizer Found this interesting approach, although you'd have to dig a little bit: https://openbuilds.com/builds/zidex.5259/

@neil said in Duet3D custom configuration/usage help:

Looking at picking up a Duet3D for a custom 3D printer build and wondering if it would allow me to configure in this custom way:

• Use my own X & Y stepper drivers... can I tell the Duet that X and Y are on I/O pins (10 & 11 it seems) on the expansion header? Or do I have to bypass the X & Y drivers on board and use those specific channels for my external drivers?
• Use the existing X,Y,Z stepper drivers for 3 Z steppers.
• Am I correct in understanding that the if I configure it for 3 Z steppers, it can auto-level by individually manipulating the 3 Z steppers? And is this just configuration or would it require custom coding?
• For my larger bed, I am planning on using 4 smaller heater pads, so would need 4 bed heaters with 4 independent thermistor inputs for those. Are the heater channels on the Duex5 for bed heaters? Or are those only for extruders?
• If I use a Duex5, would the Step/Dir 10 & 11 channels no longer be available for my X & Y axes (so I'd have to get X & Y from the Duex channels now)?
• I'm planning to use 2 E3D Titan Aero extruders, and can get 24V or 12V options. Would 24V be better (lower current), or is there any reason to go with 12V?
• If I don't get a Paneldue right away (as I want to dev/test this incrementally), am I correct in understanding (from the Getting Connected guide) that I can just use the USB and web interface for everything for now, or would I need some hardwired UI/LCD to get it setup?

Thanks!

Hi!

Imma try and answer all of your questions:

1.If you want external drivers with a DueX5 attached, then you can use the pins of the Conn_lcd header for this purpose (you can attach up to two drivers there).

2.You can utilize the existing drivers of the Duet for 3 independent Z-Screws and leveling the bed. It's already integrated into the firmware, so you just need to configure it.

3.The Heater channels on the DueX5 are NOT capable of handling the current required for Bed heaters. However, if you use SSRs for the High power, then you can use them with independent Thermistor control.

4.Go with 24V. You can use thinner and (therefore) lighter wires. Also, if you need 12V for something like a Hotend cooling fan, you can use a Buck-Converter.

5.Indeed, you can use USB/the Webinterface for testing. The firmware actually does NOT support regular 20x4 character LCDs.

I hope I could answer all of your questions. How to configure the features, look at the documentation, I haven't done it myself.

Cheers,

Dennis

@dc42 Well, I tested it out.

It works in positive direction (carriage moving DOWN), but not in negative (carriage moving UP), which seems really strange to me. Any idea?

Hey there!

I am finally getting around to configuring my printer.

A small problem though: I can't get it to run properly. Like, I tell it to move up in Z (it's a Delta), the motors make noise, but nothing else. Or it moves in XY, but not -X-Y. Why is that?

Hi!

I honestly don't know about the other stuff, but deckingmans printer could help you with the Z-Axis design.

Here's a link, just search on his blog:

https://somei3deas.wordpress.com/

@t3p3tony said in 12V Heater Cartridges on 24V PSU?:

Yes you can. basically the mosfets switch the ground side of the circuit so you can provide 12V power directly to the heater cartidge and then have only the Gnd connected :

https://forum.duet3d.com/topic/3288/converted-to-split-12v-24v-no-communication-help/4

Awesome!

@t3p3tony said in 12V Heater Cartridges on 24V PSU?:

@titanone yeah its dangerous to use 12V cartidges at 24V even if you dial the power down loads. A failure that makes it go full power can melt the heatblock, have a look at this video:

https://www.youtube.com/watch?v=qVjWg2vuWzk

Electronics are not infallible so its best to start from a design that is as safe as possible (and 150W+ potential draw on the heater cartridge is not safe).

I just remembered a post about using a 24v supply for a heated bed and a 12v one for the rest, wiring it up in a way that the internal bed MOSFET could be used. Couldn't I do the same (but with the Heater Cartridges) and a 12V power brick?

@djdemond said in 12V Heater Cartridges on 24V PSU?:

Yes by using a 24v to 12v buck converter. Or by buying 24v heater cartridges.

A 12v cartridge run at 24v produces 4 times the power. That's why you can't achieve this by setting PWM to 50% (as that's not actually 50% lower power) or even PWM 25% which is 50% lower power output because you're forcing the cartridge to run at 120w (when it was 30w at 12v) which is not good from a safety point of view.

As a real ghetto work around you could run two 12v cartridges in series, but you need to do something with the second one - maybe there is something else that needs usefully heating? More likely to just be a fire risk, having a hot thing flapping about doing nothing.

Dang, well then. Guess I will have to Frankenstein an ATX PSU I have laying around and use that until I have 24V Cartridges. Thanks anyway!

Hi!

I'm currently wiring up my 3D-Printer and noticed a small problem: I have 12V Heater Cartridges, but a 24V PSU and I don't want to waste another week by buying and waiting for 24V ones. Can I somehow use them anyways?

I think so

The Wires of the coils should be connected in following way:

A to 1A; A\ to 1B; B to 2A; B\ to 2B
Alternatively (Rotation will be Inverted):
A to 2B; A\ to 2A; B to 1B; B\ to 1A

As for Z:
Motor #1: A to 1B; A\ to L1; B to L2; B\ to 2B
Motor #2: A to L1; A\ to 1A; B to 2A; B\ to L2

The Z-Motors are wired in series, for I believe reducing the required drive current.

Hope I could help (and didn't make you kill your board ???)

That thing is incredibly awesome!

Looks awesome!

@T3P3Tony:

Interesting! two motors in series from one driver will turn in opposite directions if the coils are swapped. (Its the same logic as turning the plug around to make the motor run the other way rather than switching it in firmware.

Thanks! Guess my tests with the A4988s that I had laying around weren't really proper. Screwed up somewhere, DERP.

Hi,

soooo, I'm currently planning (with BIG emphasis on PLANNING) a 3D-Build with Duet (ALL 10 Drivers of a Duet+DueX5 are used, the Con_LCD header and some endstop-pins are reserved), on which the Y-Axis is going to be heavy. So I want to run two wired in series for it. Now, because of the mounting of the Motors, one of them has to run in OPPOSITE of the other. Is there a way to wire up two Motors in series, but running just like described?

Cheers.

TitanOne

Lookin' damn good! If it's obtainable anywhere, I might consider it as an comfort upgrade.

@dc42:

I found this https://www.shapeways.com/product/E628BXAJW/bi-v2-5-effector-for-chimera-with-ir but it's not cheap and I don't know whether the rod spacing is suitable for a Mini Kossel. There is at least one thread on using a Chimera/Cyclops on a delta on the reprap forum, but that forum seems to be down at present.

Unfortunately, that looks like it won't fit, but still thanks!

Good Evening, dear Reader!

I'm getting closer to order a Duet WiFi (finally, after my old Phone has gone kaput, I had to put my 3D-Printer Project aside) and now I'm thinking about parts I can order too.

For now, I see a heated bed Upgrade (With the Duet, that will already cost me 370€ T-T) and some kind of Z-Probe. Buuuuuut I don't know what to choose. Especially since I totally SUCK at 3D-Design.

So my question now: Has anyone made stl.-Files for a Kossel Mini Effector with an E3D Chimera/Cyclops and some Probe? I have a spare Microswitch laying around and thought about using that.

Kinds Regards

TitanOne a.k.a. Dennis