Emergency stop button/tensions

New Home Forum Mostly Printed CNC – MPCNC Advice – MPCNC Emergency stop button/tensions

This topic contains 11 replies, has 4 voices, and was last updated by  Barry 4 months, 4 weeks ago.

Viewing 12 posts - 1 through 12 (of 12 total)
  • Author
    Posts
  • #61780

    Mike Thorn
    Participant

    Hey all, I am trying to get everythng set to finish my build. I have been trying to find these answers but haven’t had any luck. I have a few questions. Firstly I am wondering how to wire the emergency stop button? I purchase the button from Ryan and I believe it is likely meant for the 12v side and wanted to make sure that is correct and not wire it on the a/c side. Secondly I am a little confused about the tension for the bearings. Maybe someone knows of a video or something? Thanks in advanced.

    #61781

    Ryan
    Keymaster

    Firstly I am wondering how to wire the emergency stop button? I purchase the button from Ryan and I believe it is likely meant for the 12v side and wanted to make sure that is correct and not wire it on the a/c side.

    It works on either voltage. As for wiring it, one side is normally open and the other is normally closed, typically you use it to break a positive connection.

     

    Secondly I am a little confused about the tension for the bearings. Maybe someone knows of a video or something? Thanks in advanced.

    Start by not tensioning them at all.

    1 user thanked author for this post.
    #61787

    Mike Thorn
    Participant

    Thanks Ryan, are you refering to just the “tension bolts” as refered to in the instructions? I have them loose but it has some drag already. Maybe i should loosen the others and check again? Thanks

    #61788

    Barry
    Participant

    None of the bolts should be tight.  The nuts are there to keep the bolts from falling out for the most part.

    1 user thanked author for this post.
    #61794

    Mike Thorn
    Participant

    Thanks both of you, I will loosen them up when I get home!

    #61973

    Mike Thorn
    Participant

    How do you all have the emergency switch wired? Do you have it kill the power supply and router? Will a loss of power damage the mini rambo?

    #61975

    Ryan
    Keymaster

    I use a power strip to kill it all at once. So I would suggest wiring it in like that, kill it all button, the electronics should be fine.

    1 user thanked author for this post.
    #62006

    Bill
    Participant

    Also be aware that killing the AC won’t shut off the controller if you have it hooked up to the USB port on a laptop. The spindle will turn off, as will the steppers and such, but the Arduino/Rambo and notebook will continue to run. Best bet there if you really want a kill switch that shuts everything down is to have the notebook shutdown on loss of AC, which can be handled by the OS.

    2 users thanked author for this post.
    #62040

    Mike Thorn
    Participant

    Thank you for the input. I am planning to run the machine from either sd card or octopi/cnc image. I have been using the octopi for my printer for a bit. I bought the full graphic LCD from Ryan and just used it to run the crown test with a sharpie. had to adjust the stepper connectors to orient, but got it on my first switch. It looks good except a low spot in my mounted board where the pen didn’t draw. I am gonna be replacing with some MDF and surfacing it. All in all I am very happy thus far. If I do have a laptop hooked to the mini rambo will it power the board and the steppers to where they keep moving?

    #62046

    Ryan
    Keymaster

    I am gonna be replacing with some MDF and surfacing it

    MDF should be reasonably flat. I have never surfaced my machines, the most recent PCB probably would have been perfect it I did but after this many years I would say don’t bother unless you get into PCB’s and then only surface a small mount plate.

     

    If I do have a laptop hooked to the mini rambo will it power the board and the steppers to where they keep moving?

    Nope, but if you power it back up it will try to continue where ever the code is that is still running. You would just need to remember to reboot it before powering up.

    1 user thanked author for this post.
    #62052

    Mike Thorn
    Participant

    Well dang I already bought the surfacing bit so I think I’ll just give it a try.

    #62055

    Barry
    Participant

    Well dang I already bought the surfacing bit so I think I’ll just give it a try.

    The surfacing bit comes in handy to shave off all the swollen spots where hold down screws go in.  It can also take out the cut through lines as long as they’re not too deep.

    1 user thanked author for this post.
Viewing 12 posts - 1 through 12 (of 12 total)

You must be logged in to reply to this topic.