Don't tell me I'm the first

Salvageable maybe. :fire: :open_mouth: :thinking:

How hard is it to change this 4 pins connection on a nema 17? How do you call this type of connection by the way.

Heat shrink wrapped Butt Connectors to extend Stepper Wiring for my build…

Hope that helps, cheers!

3 Likes

Can I change the whole plug itself do you know? But yes this could be a way :slight_smile:

Sorry, maybe I misunderstood what you’re wanting to do. Are you wanting to :

A) Change wiring that goes into the stepper body? I don’t know how to do this for the V1E Steppers I bought, the wires go into the Stepper body, would need to open up, no idea if that’s a simple re-solder job or more involved.
B) Or, extend the wire you have? For this the video clip shared is what I did. Hopefully people will chime in if there’s better way(s).

2 Likes

Opening the stepper isn’t fun. They are usually glued together. The wires inside are super tiny (the motor windings). If you can’t fix it, you might as well open it and take a look. It is educational, at least.

Replacing the B side is easy. I use dupont connectors, and there are some tricks for success. Just soldering and shrink wrapping is fine too. Or there are some better locking connectors from molex.

3 Likes

Good to know thanks. I’ll just go for the rewiring and get myself some Nema :slight_smile:

Now you’ll have to engrave a Phoenix and some flames on the new spoil board.

5 Likes

The Phoenix!

3 Likes

WOW,

FIRSTLY!
I am really, really REALLY glad you were there and and not sometimes like I am, headphones on music blaring against the noise. ( I guess I will be able to smell it.)

Secondy:
I am super impressed you had a fire extinguisher around. After reading this the other night I went around looking for a fire extinguisher in my brothers workshop. I was amazed to find that he didn’t actually have one. With some of the super dodgy shit that both of us do in that place, hell acetone tipped over onto something hot will give you an ā€œoh shit dayā€. Not to mention the things like you have experienced, just those super random things.

So I went out on the way to work this morning and brought 2 dry chemical fire extinguishers and 2 fire blankets. (as an aside the fire blankets make a great welding blanket!!)

I am sorry your machine did this, but THANKS! for pointing out a safety issue that I had not noticed!

4 Likes

Good thing for sure.

And no problem, part of the game. Can’t wait to build it back honestly!

3 Likes

Thank you for the reminder @Fodder1, forgot to do this over the weekend, just added reminder to my hardware materials list…

3 Likes

I had one of those gallon pump up spray bottles full of water. Also had a real extinguisher, but the water was going to be the first step.

ChatGPT tells me CO2 or dry powder extinguisher are recommended for putting out a CNC instigated fire?

Recently bought some fire blankets, mainly for dealing with oil or similar kitchen fire. Wondering whether anyone’s successfully/unsuccessfully smothered a CNC/laser fire with these 100% glass fiber blankets before?

Also, it’s just heavy weight weaved glass fiber. Curious if anyone’s built an enclosure with roll of this, or something similar that isn’t too $$$, e.g. think Rockwool filled panels supported by EMT conduit based frame. PLA brackets that melt if hot, design enclosure to collapse and smother fire on fail. Separate power cut via SSR on unexpected thermal event. Dumb idea?

Hmm, maybe being around a bunch of silica based fiber glass weaved fabric panels is more of a respiratory health risk than a fire breaking out, Glass fiber - Wikipedia ?

1 Like

Take a look under the hood of your car.

Usually there is a ā€œblanketā€ that serves as insulation to keep the engine heat from cooking the paint, as well as sound deadening to keep the engine noise outside the car down. It will be pinned to the hood structure with several plastic pins (typically ABS.)

So what do you think happens to those pins if there is an engine compartment fire? They are designed to melt and drop the blanket on the engine. The engine isn’t a great surface to seal to, but the FI system tends to keep things like pressurized fuel bear the top, so there is at least a chance…

As for the actual effectiveness in real-world conditions, it seems more car fires are electrical in nature and start under the dashboard, so we still end up with burned out hulks, but maybe we are saved a few Hollywood style explosions regularly by the under-hood fire blankets… I don’t know, I just know they’re there.

2 Likes

Just curious. How’s the rebuild going?

I’m not sure I agree with Dan’s thoughts on the car under-hood lining! (There’s a whacking great air supply coming from directly below in that case.)

Smothering a fire with a fire blanket involves cutting off the oxygen supply to the fire. With a cooking fire (or a CNC) as long as you take away the heat source, the heat blanket will smother the flame.

I have one in my van, two - one mounted either side of the galley in my boat, and I’ve wasted one on a campfire to see how it works. I think if your fire is hot enough to drop PLA brackets as described, I’d rather be relying on something else, like an AFO Fireball for a bit of automation, or an extinguisher.

Find a company trying to replace/upgrade their Halon system… Boom, fire suppression sorted!

What I thought too, but apparently it works. Certainly better than nothing, not everyone has a foam fire suppression system under their hoods like some of the big league racing cars have.

Still most vehicle fires I know of are electrical (Including one I lost a car to) starting under the dash. (Mine was the alternator, but was a small fire, never got big enough to melt anything other than the engine wiring harness directly above it)

1 Like

Getting there. Not sure if that I understand the Dashboard of FluidNC yet.

Took a while but slowly getting back there.

9 Likes

That machine needs to be named Phoenix or after a phoenix. It’s rising from its’ own ashes.

1 Like