Initial cam values (initialisation), function blocks CDATA and CURVEC1

Question:
What has to be taken into account at the import of curve profile data if the cam starting position is not identical to machine origin (the starting point is not the reference point)?

Answer:
In the stardard use case the starting point of a cam (x = 0, y = 0) used to be defined as the reference point or reference point offset.

For any different starting point for the motion profiles (x = 0, y <> 0) in the GDC dialog 'Basic cam data' an item for selecting the position of the starting point and thus a starting point different from x = 0, y = 0, has been accepted, for imported cam data as well.

In order to implement this function in FB configuration the input CCTRL-RESET must be 0 on power up (then the cam starting point will also be sent to CCTRL-PHI-SET). Input CCTRL-PHI-SET should preferably not be used.

Moving the drive to cam set position must be performed with the aid of a ramp function generator (RFGPH2). This function should always run if

• a new cam has been activated (product change)
• the drive has been removed from cam position by manual positioning
• after power up.

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/201010117/1/