ToolsUnclamped - Input Convention Confirmation

[RJS100]

I mounted a Normally Open proximity sensor to my power drawbar to indicate when the drawbar is activated and "unclamps" the tool. The first image shows the drawbar in the clamped position (No power to the solenoid).

The second image shows the Unclamped position with the solenoid activated. The LED is glowing on the proximity sensor, and input #37 (the last image below) is red.

When the drawbar is released (no power to the solenoid) the drawbar retracts, the tool is clamped and input #37 shows green.

Can you confirm that this input is acting correctly?

Richard

[cncsnw]

I don't think that is correct.

You appear to have INP37 inverted (that is why there is an overscore above it).

You should un-invert INP37, so that it is green (closed) when the tool is unclamped, and red (open) when the tool is not unclamped.

[RJS100]

Thanks Marc. I did not notice the overscore on the input. Since I used a normally open proximity sensor, I set the input to N/O. I was not sure what CNC12 was expecting. I will invert the input.

Thanks for your help.

[cncsnw]

Since I used a normally open proximity sensor, I set the input to N/O. I was not sure what CNC12 was expecting. I will invert the input.

In my opinion, this is a longstanding design problem with the Acorn Wizard. You are led to believe you should select "N.O." if you are using a normally-open sensor, when in fact you should select "N.O." if your sensor is opposite the expected state and therefore requires inversion. It is up to you to guess what the expected state is.

Just for clarity, could you post a screenshot of the Acorn Wizard page where you assigned and configured the ToolIsUnclamped input?

[RJS100]

Hello Marc,

Attached is the screen shot of the Wizard. You are correct, it is a bit confusing. I revesed the input so it is now Normally Open and it works as you described "is green (closed) when the tool is unclamped, and red (open) when the tool is not unclamped". Also, no overscore above the input. Thanks again.