Emergency Stop

K8200 3D Printer K8200 - Issues while printing
1

Not sure if this is the right forum for this question, but I can’t find anything more appropriate!

I have adapted my K8200 to use as a CNC milling machine which, within the limitations of my as-yet-unmodified Z-screw, works pretty well. However, on occasions, I find I have an urgent need to stop things immediately - but I can’t! Because the commands are buffered, when I see something going wrong - like the cutter trying to descend 5mm rather than 0.5mm - I want a means of instantly raising the cutter and returning the bed to home, rather than tearing its way through everything that I have done before like it does at the moment!

Does anyone know of a mod to either hardware or firmware which might let me achieve this?

2

The Emergency Stop is worthless, at least for emergencies. It seems like it stops it about 10 seconds after the button is clicked. It’s more of a “Gentle Stop”.

For real emergencies (like it bombing and trying to shove the table through the side of the frame) I started just switching off the power to the machine. I can’t imagine anything would be harmed.

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3

Yes, I had considered that option! I was just hoping someone might have come up with a more elegant solution! :slight_smile:

4

There are a few ways you could handle this.

One way would be to interrupt the enable line to the stepper boards.

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