MakerFr.com

Hi all i am continuing with my cnc build and am planning to fit an emergency stop button and wanted to know if anybody else had fitted one or considered doing so and if anybody had any wiring advice for the button.


Sent from my iPad using Tapatalk

Hi Anthony !
You can simply wire your emergency button on power entry, to the normaly close (NC) contact of your button.
Romain

RoMaker a écrit :Hi Anthony !
You can simply wire your emergency button on power entry, to the normaly close (NC) contact of your button.
Romain

Thanks Romain thats what i was thinking at first but i have seen a youtube video where they wired it into the 12v cables so it will stop the steppers rather that stopping the router. I think i will do some more research but thanks for your response.


Sent from my iPad using Tapatalk

You can find much solutions, i prefer when the emergency button is before all, and shut down the main power, but as you want !

RoMaker a écrit :You can find much solutions, i prefer when the emergency button is before all, and shut down the main power, but as you want !

Yes your probably right Romain!


Sent from my iPad using Tapatalk

I'm using emergency stop wired to the mains in series, so it turns off router and power supplies at the same time. I was however worried that turning off the router would cause inductive voltage spikes that could damage the power supplies... so far nothing broke yet, but i'm afraid it could.

ViiD a écrit :I'm using emergency stop wired to the mains in series, so it turns off router and power supplies at the same time. I was however worried that turning off the router would cause inductive voltage spikes that could damage the power supplies... so far nothing broke yet, but i'm afraid it could.

Thanks for your post i think i am worried damage could be done if the router stops but the steppers don’t stop immediately. I have already wired it the same as you suggested.


Sent from my iPad using Tapatalk

Router has inertia and it will spin for a few seconds after the emergency stop, whereas the motors drain so much current and have so little inertia that they stop at the same moment as you press the button.


It just hit me, emergency stop buttons have 1 NC (that we use) and 1 NO switch (which we dont use), so if I wire NO switch between system's 220V lines (after the emergency switch) to short out the power when the switch is pressed, it could short out the voltage spikes. I'll look into it just to make sure its safe

ViiD a écrit :Router has inertia and it will spin for a few seconds after the emergency stop, whereas the motors drain so much current and have so little inertia that they stop at the same moment as you press the button.


It just hit me, emergency stop buttons have 1 NC (that we use) and 1 NO switch (which we dont use), so if I wire NO switch between system's 220V lines (after the emergency switch) to short out the power when the switch is pressed, it could short out the voltage spikes. I'll look into it just to make sure its safe

Ok cheers


Sent from my iPad using Tapatalk

Rochdaleblue a écrit :

ViiD a écrit :Router has inertia and it will spin for a few seconds after the emergency stop, whereas the motors drain so much current and have so little inertia that they stop at the same moment as you press the button.


It just hit me, emergency stop buttons have 1 NC (that we use) and 1 NO switch (which we dont use), so if I wire NO switch between system's 220V lines (after the emergency switch) to short out the power when the switch is pressed, it could short out the voltage spikes. I'll look into it just to make sure its safe

Ok cheers


Sent from my iPad using Tapatalk

Hi Viid

I am still in the process of making my cnc but wanted to know if you have finished and if so how do you find the machine and is it easy to operate.


Sent from my iPad using Tapatalk