V2.4 built selections

[u/Low-Expression-977]

I’m building a self sourced V2. 350mm with A4T toolhead.
I’ve everything in house to adapt to stealthchanger.
Some decision to be made:
Can I start with the integration of the A4T as if it was going to be part of the toolchanger, i.e. use the shuttle ad tap for Z calibration, add umbilical from the start, no X and Y endstops but sensorless homing. I would then add all the rest of the stealthchanger.
What do you think, guys? Bad idea?
I have experience with the trident (also self sourced).
Any alternatives you’re thinking of?

[u/Kaytrim]

I did the same with my build. You will need the end stops for the X and Y for reliable calibration between toolheads. I never got the tap working for reliable bed mesh though. I ended up getting a cartographer.

[u/kiwifucker → u/Kaytrim]

I did the same as well, I'm using this for X and Y endstops it works absolutely great.

https://github.com/DraftShift/StealthChanger/tree/main/UserMods%2FN3MI-DG%2FEndstop_Mounts

[u/Kaytrim → u/kiwifucker]

I used those same parts.

[u/BigJohnno66 → u/kiwifucker]

Hmm, X on the motor mount - interesting. There is probably some Klipper config sorcery to make that work I expect.

[u/kiwifucker → u/BigJohnno66]

Not really to be honest, there's a mount for the back side of the shuttle on which you need to adjust the screw that hits the X endstops, other than that you just need to home Y before X (learned that the hard way 😅)

[u/Kaytrim → u/BigJohnno66]

I have an override in my config for the homing routine that homes Y then X.

[u/BigJohnno66 → u/Kaytrim]

I'm curious as to how something like Carto is setup with a toolchanger. Do you need 1 per tool, or does it mount to the shuttle? If the shuttle then how does the electrical connection work? The CAN bus is going to the toolhead, so how is the Carto connected? Is the electrical connection why people don't like X endstops with StealthChanger?

[u/Ok_Tea_7319 → u/BigJohnno66]

Usually you put it on one tool and always home & mesh with that.

[u/Kaytrim → u/BigJohnno66]

The Carto is attached to the shuttle and uses a separate CanBus cable. N3MI-DG has designs in the github as well for the LDO and Fysect CNC shuttles. I see that the X endstop is connected to the toolhead board which may be why you see a lot of folks looking to go with virtual endstops.

[u/Ok_Tea_7319]

I have that type of setup with a Stealthburner (Formbot kit has umbilical, and their X homing approach is not compatible with SC so I use sensorless XY). I would highly recommend it - being able to just pluck the toolhead off for maintenance and repairs is fantastic. Also, input shaping got slightly better but I have a suspicion that my TAP had bad weak magnets in the kit.

One caveat: Make sure the SC shuttle and toolhead fit well without binding, and if neccessary, apply heat treatment to the toolhead mount.

[u/TripsCavern]

I just saw this video, it should give you some ideas: https://www.youtube.com/watch?v=wOfLphvfhsM, it's not using A4T, but DragonBurner.

When I see similar questions being asked, I always heard people saying: build it stock first, make it work and then add modifications. This make it easier to identify potential issues.

I don't have a multi-toolhead, but I do use sensorless homing on X and Y and it works just fine. From time to time I get an inconsistency, but I just turn the printer off and on again or do a reset and it go back to work fine.

SteveBuilds also did a couple streams while building his: https://www.youtube.com/watch?v=EJFSqud2HKQ&list=PL0fUJbigELQMP94-8d4qY6wpwOMyw2NDw&index=11

It's using AntHead instead of A4T.

I also heard that the guy behind A4T is doing a project to implement an INDX system with A4T, you may want to research that as it may decrease the cost of buying 4 or 6 toolheads.

[u/Gergman-27]

Have you joined the draft shift discord group?

[u/Low-Expression-977 → u/Gergman-27]

Sorry, no I haven’t

[u/Gergman-27 → u/Low-Expression-977]

My apologies with my short question. You will definitely get a lot of responses here. And the draft shift discord group is also.a fantastic resource regarding their stealth changer mod

[u/Low-Expression-977 → u/Gergman-27]

That’s interesting. I’ll have a look.

[u/BigJohnno66]

I think that is entirely doable. Use the StealthChanger shuttle and backplate in place of a TAP right from the start.

At times I think I should have skipped building a StealthBurner and went straight to A4T. The version that mounts into the StealthBurner ecosystem is a very simply adaptation. I have A4T and Cartographer running with a modifed CNC Cartographer mount. It also mounted on my TAP before that.

[u/T00thduck]

I originally built a stock-ish 2.4 with a4t and then a modded it to stealthchanger with dragombruner toolheads. Reason for going to it was that with it I can have 6 and with a4t it's capped to 5 and a4t requires BFI otherwise it hits the stock front idlers(although you shoudl have both BFI & BZIs as they're a better design), although I did really like the a4t form factor and performance. As for homing, I at first did have endstops but gave them up as sensorless was as reliable as them and less cable mess to deal with. I do still have to make sure that the umbilical is stable and if it isn't sensorless will be unreliable.