How to get cam functions with a stepper module

[GoranP]

In my project I have two stepper motors, and controllers. The control program am I doing in Python.

 

It had been very nice to have cam-functions in these modules.

With cam-function I mean a programmable functionality that let me set a position. When these position is passed, in one or other direction, it should trigger a callback function that inform me that we have passed this position and if we are more or less than the given position.

 

My questions :

- is this something that could be fullfilled without a firmware update?

(I have tried to do this with use of callback_all_data, but it seems to load the system to much.. ).

- Has somebody an idea how to make it nice, with low computer load and fast execution?

[borg]

So you want to go in the direction of a position and get a callback if you have reached the position but not stop at the position, right?

 

With the current API you could drive forward/backward and either poll "get_current_position" or use the "all_data"-callback. I don't see any easier way.