Goodbye A350 Printer ! RIP!

I wrote to them… They said I need a new unit of controller, 3D head and Laser head… And I asked how can I get it? Still waiting a reply, but I’m afraid to buy a whole set!!! Suck!

It doesn’t make sense that you wouldn’t be able to just buy the 3D head and the controller. I would make sure there isn’t confusion on their part. I seem to remember someone having problems with one of the heads and receiving just that one. Maybe it’s different for warranty at this point.

It’s possible that plugging in the other heads after the controller was damaged could damage them but it’s doubtful.

I agree, your other heads are probably fine. They could have used a reverse-polarity protection diode, assuming the issue was swapping +/-, or an asymmetrical pin layout that wouldn’t engage backwards, or shorter power pins that wouldn’t engage at that depth. But, while unfortunate, I can’t fault them too much. These are things manufacturers figure out over time, we are guinea pigs to some extent.

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Using a connector that is not keyed so it can’t even start is just wrong. The latch is not a key, it’s a retention device. There are so many connectors to choose from that if this connector really can easily be plugged in backwards and connect, I would consider that an unforgivable error. Reading the forum makes me wonder if putting in an order for a 350 was a mistake?


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That’s a personal decision, but I will say this is one of the best KS projects I’ve ever backed. Hmm, well, I don’t do KS anymore, but aside from that… :slight_smile: Anyway, my A250 has for now been great hardware-wise. I’ve gotten the best boaty hull layers I’ve ever had, right out of the box with their PLA, than I’ve gotten with 2 other printers after tweaking. The structure is very stable, layers are amazingly good. But, the software is still a work in progress, especially the CNC stuff. Could they have used better connectors? For sure. Is the issue a problem for me? Not at all. I think there’s a lot of potential yet to be realized.

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I don’t regret my purchase… It’s nice tool. But, It’s was un issue to use it with enclosure when you don’t have proper light and hard access to the head. So, you trust your feeling touch and thinking all it’s OK because the plug stay in place. WRONG!!!

It’s warning topic and hope they will use other plug design on a SM3 to prevent that kind of mistake. But, what make me aware… I think they knew the problem, because they send me the picture of good and bad connection picture. So, they knew what happened to me…Because, I never knew it was the wrong connection untill then. Why they don’t send a warning notice to every user that could be happen or put into user book? That’s my point!

And mine is, they should have apologized and sent you new parts. I know it sucks as a manufacturer when you have to give away stuff for free, but it’s the only way to get your users to respect you and it gives you great incentive to fix the problem. I’m never happy when I need to spend $80 to send a $10 part UPS Red AM, but when the customer ordered that way and it didn’t work when it arrived or it was the wrong part, we’ll do that if necessary. I’m unwilling to have someone say, “I’m thinking abut canceling my order because the comments on the forum are scaring me.” Now I don’t have a forum, but there are no negative posts about my company on the web I’ve ever seen.

IMHO of course. Ira


Respect has no price! Thanks for your input!

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Please contact for more help.


Either way, I think the connector can use some redesign, you should not be able to plug it in the wrong way no matter how.


Hi @Drizzt430,

We’ve redesigned the female sockets and jacks to prevent this sort of thing from happening. The new design has been tested and is now in factory production.

Sorry for the inconvenience.
Best regards


So I was right. They knew it and never sent a notice that we could burn out the printer. If I was informed, be sure, I will verify twice before to turn on my Snapmaker and I will put a warning sticker on plugs for others users.

Now I’ve screwed my printer! Will they replace it under warranty? I hope so! Because, I think I’m not faulty in this case. They made a bad plug design and they do not inform users after all about this possibilty to brake your printer if we plug in wrong way.

So, I’m waiting what they will do in my case. Should I pay for faulty design or not?

My A350 is fine, just pointing out that people should not blame Veasna for not being careful, as an engineer myself I reckon it’s the engineers’ responsibility to prevent such things from happening.

But hey, thanks for taking this seriously, hope my next addons are coming with the new connector and be compatible with my current machine.

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So it wouldn’t be a bad idea to print a stop or something to attach and prevent from happening altogether. Thanks for posting this info.

which shipments will include the updated design?

The forum has much historical information. So keep in mind, some things you read are from like, firmware/luban v1. It’s worth checking if “issue X” was from last year and has been resolved. Yah, machine is not perfect. Never had a 3d printer that was, it’s still an innovating industry. 3 in 1’s, specifically are still few and far between.
Just like original snapmaker, the updates to firmware and software slowly fix many
Just saying, let’s see what support does.
I had a linear module and the removable print surface replaced at 0 cost, so don’t think the never send out free replacements.

My A350 problem was not installing the cable holder on the vertical linear module before trying out the printer. The holder is needed to keep the controller-to-module cable from catching on the frame. It is clear in the assembly manual that this needs to be done so my fault. The cable snagged on the horizontal linear module and broke the connector oval shield plastic and bent the pins on the controller end. Support was very nice and a new cable was $2 plus $14 shipping and arrived promptly. All is well now and my A350, with the latest 1.10.x firmware, is great.

Having experienced a similar issue - changed the printing head (on my brandnew A350), plugged in the cable (in blind mode), all seemed to be properly connected, no lose feeling, switched on the machine - smoke came up and display now reports: “machine is not responding, …”

This is crazy! Waiting for the support to advise.

Sounds like you plugged in the cable to the toolhead backwards from what a few other people have done.



 I would like to make a big THANK to Snapmaker support team. I got yesterday my new controller and heads! So far, all it's working fine and I'm back on track afters couples weeks. So don't make this mistake and verify your cables before to power on. Hope on near future we could buy replacement part after one year warranty if any mistake could be happen again.