Jackpot - Emergency Stop

Software / Firmware Jackpot Board / FluidNC
1

Hi Everyone,
I am building a MPCNC with a Jackpot controller. I have an emergency stop switch and was wondering the best way to wire it up. I could use the NC and switch the positive of the 24 volt supply. But I was hoping there is builtin capability in the controller to pause and stop all the motors. I am a newbie so if this has already been addressed I apologise in advance.

Thanks everyone,

Bill

2

I don’t Know of any built in on the board. I believe most just switch the power supply like you are planning. Once you disable the motors you will have to home again and all before starting back up. Most people use the switch on a power strip as the estop. That way you cut power to the router and the controller at the same time

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3

There’s nothing on the board that will do that, you just cut power to the board. If you wire in a relay to cintrol the router killing board will kill it as well.

4

Oe of the things I like about having a fluid dial pendant is the hardware HOLD and END buttons so I can stop a job immediately if the router goes off course. It doesn’t stop the router spinning of course.

I wonder if that could be done - if you had a second esp32 (as with a fluid dial) in an emergency stop button that when a button was pressed it would stop power to the router via SSR and send a pause command to the jackpot via serial UART.

Can’t see why it wouldn’t work…

5

I always assumed it was possible to hook up a “door” or whatever the heck it’s called in FluidNC that would halt the program without cutting power. In some cases this is preferable to cutting power because the tool can drop. But it’s really not the same thing as emergency stop, so you probably want to have both.

6

It is. All of the related options are in the control section of config.yaml

control:
  safety_door_pin: NO_PIN
  reset_pin: NO_PIN
  feed_hold_pin: NO_PIN
  cycle_start_pin: NO_PIN
  macro0_pin: NO_PIN
  macro1_pin: NO_PIN
  macro2_pin: NO_PIN
  macro3_pin: NO_PIN
  fault_pin: gpio.34
  estop_pin: gpio.2

Yes, agreed.
E Stop should be for emergencies, and cut all power.

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7

The safety door is a good choice. But also make sure you can reach the switch on the power strip.

Safety systems are very complicated and doing them wrong can make things get worse. IMHO:

  • Have a fire extinguisher nearby
  • Have a way to cut power to everything without putting yourself in harms way

Having a pause button is going to save a lot of the small damages that can go wrong. But the major stuff needs real safety. The estop button is just a button. You can use it for pause or emergencies. Don’t worry about the name. But don’t skip the step where you have an actual power switch in an emergency.

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