Foam Robot Trigger

[HRLY-RDR]

I am in the process of doing the finishing touches on a robotic foam system, and I am having some issues with the trigger mechanism.  I have a NX100 with an HP20.  I need to set it up so that the foam gun stops when the servos shut off.  Is there some sort of a ready built system where I can have the signal shut off when the servos go off so there is no chance of a misfire, as well as no issues if there is some sort of alarm and the robot stops?

Thanks
Mike

[smurrill73]

Can you wire your trigger into the safety circuit?  If you're using a PLC with I/O connections to the robot, you could tie the trigger output to a PLC input, then have the PLC logic switch an output that will have its power removed when the safety circuit is tripped.

If hardwiring is not an option, you could turn on a dummy output for the foam trigger, then in the CIO ladder use that output in series with the servos on relay (I forget the actual relay number, I believe it's in the 8xxxx range) to turn on the actual trigger output.

Hope this helps,
Scott

[tony gast]

this can be done in the robot ladder......but you may also need other conditions....to create a bug free FOAMON control

I tie to alarms and errors....servos and running......zones and metering devices or anything else in your system that helps prevent issues

[Robo Guru]

You will want to map this through your robot ladder.  Motoman Canada does something similar to this when it comes to Waterjet applications.

You never want the jet to come on in teach mode as someone could get hurt, so using the ladder, we can modify the conditions that the output is allowed to operate under.

For your applications, before the the output can turn on, it would first have to meet all your requirements

- Servo ON
- No alarms
- etc...

Rg