Using CAM

2020-02-27T14:26:09.080000Z

Bumping this thread as I have the exact same question in #1 and it still remains unanswered after several months.

Zitat:
While the CAM operates, how do I know its current position?

We have succeeded in obtaining this information by accessing the internal variable "xr" within the function block MC_CamIn, but we think there should be a more user-friendly way of doing this, such as an output pin or a dedicated function. Accessing internal variables seems a bit dangerous as their purpose could very well change between versions.

Would be great if we could get an answer to this!

Kim Hansen
Beijer Electronics Automation AB

Using CAM

2020-02-27T14:26:08.639000Z

Hi,
I'm constructing an online changing set of cams, and have a a few questions about that. In order to make an online change, I have constructed my own structure TYPE "SMC_CAMTable_LREAL_1000_2" with a 1000 points array. The online data is received in sections at a time, and I wish to stop at the end of each section and wait for the following section data.
1. While the CAM operates, how do I know its current position? I want to know when the CAM is at the defined set points, at the end of the interpolated segment.
2. Using the "MC_CAM_REF" FB, what should be the "nElements" input value? Can I use it as an end position marker?
3. In order to set the cam timing, do I set the virtual master axis with a set of [x,x] values, and a constant 1[u/s] velocity?

Thanks
Alon.

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