Manual tool change with probe (without touch plate)

[orbscan]

Thank you Dave!

1) The circuit works but I have set Active LOW Probe Input Signal WITHOUT Pull Up Resister to BOB Input terminal...

What do I do now?

My BOB is powered at 24v...

2) Safety circuit --> I removed the power to the circuit (simulating the failure of the power supply) while the probe was running and the probe did not stop it... It would be destroyed if I had not pressed the e-stop button...

How can I make safer the circuit?

Thank you
Best regards
Carlo

[DaveCVI]

Thank you Dave!
1) The circuit works but I have set Active LOW Probe Input Signal WITHOUT Pull Up Resister to BOB Input terminal...
What do I do now?
My BOB is powered at 24v...

Many BoB have pull up resistors internal to the BoB circuit, when that is the situation, you don't need an external (External to the BoB) resistor also.
Since the circuit is working for you, I suspect your BoB has the pull up internally. So with it working, that's all you need.
About the 24v power to the BoB: the power to the BoB does not matter, what is important is the voltage levels of the input pins to the BoB - those are probably 5v signals - (if they were 24V, you would have blown up the 7405 chip by now).

2) Safety circuit --> I removed the power to the circuit (simulating the failure of the power supply) while the probe was running and the probe did not stop it... It would be destroyed if I had not pressed the e-stop button...

How can I make safer the circuit?

This is a question about how to set up the e-stop circuits for your machine. That can be a complicated topic which is about how to design safety circuits and what conditions you want to protect against failure. It sounds as if the condition you tested ether did not trigger your estop circuit or your estop circuit did not shut down the machine's motion. Please understand that I can't help with that topic as I don't know your machine and product support for MSM does not include designing custom control circuits for CNC machines.

Dave

[orbscan]

I understand ...

Thanks for everything
Carlo

[DaveCVI]

Usually the estop safety circuits are implemented independent from the BoB. The estop safety chain is supposed to work completely independently from Mach. This requires that the estop design can not rely on mach and usually means the estop circuit is implemented in hardware as part of the machine wiring and control. Pressing a physical estop button should should stop the machine motion immediately - and that must happen no matter what mach is doing. An estop design should NEVER DEPEND on mach taking some action (mach could be hung or not running, etc.).

While many BoB's do provide a Estop signal into mach, this is only intended for nicely informing mach of the (already happened) estop condition (think of it like a polite notification for Mach). Estop circuits often remove power from the motors and connect other circuits to quickly remove stored power that could continue to drive the motors. The whole idea is that you want all motion stopped right NOW!

Because the estop function is supposed to be independent of mach, and of most of the functions of the BoB, usually one BoB model verses another will have a significant impact on "making the machine safer".

Forget about probing for a moment; if you hit a estop switch, your machine should stop motion - and it should do that no matter what mach thinks it is doing. If your estop setup system accomplishes this goal, then it will not matter what type of tool is mounted (probe or not probe) when estop is triggered.

Dave

[orbscan]

Thank you Dave!

Carlo