What level of safety you need is up to you.
Thank you for all responding. Ultimately Aciera statement is my viewpoint. I was seeking input from the experts and those in know with the wiring and hardware but I see there is conflicting opinion with respect cutting main power to drivers and motors or not to and the definition of what an e-stop is and underlying control function.
I am sure this topic has been discussed many times over and I do not profess to be an industrial control expert and would rather not open the Pandora's Box. The state of the machine all depends on the level of stop category one desires, from what I have found:
- Level 0 is an uncontrolled stop immediately removing power to the machine actuators.
- Level 1 is a controlled stop with power available to the machine actuators to achieve the stop and then removal of power when the stop is achieved.
- Level 2 is a controlled stop with power left available to the machine actuators.
Level 0 I already have by my paddle switch that cuts main power to the machine actuators and control in their entirety. The ultimate "holy s**t" button. Terminate power, evaluate current condition and take appropriate corrective action. I think the level of controlled stop I am going to attempt is 1. I currently have what I would consider a good understanding of needed connections in HAL and have most of it mocked up.
Again, appreciate the input from all.
- Darryl
