_getCamLeadingValue cannot get the right resualt

When the point I want to obtain is on the straight line, an incorrect result is obtained.

when followingvalue is 100, no matter how I correct the value of LAPosition, the result obtained is always the first point after the offset of the cam X-axis.

Well you should define what you mean for "it's not correct", please make an example.

You are working across the modulo value where system reaches a sorta of "non derivable" curve : the slave position passes immediately from Modulo to 0 instantly. It's not a real movement but it's a sorta of redefinition of slave's position (called in fact : modulo).

In my opinion you are asking the system what is the master position when slave's crosses its modulo.

I think that you can work-around this by saying in your software "if Slave pos = 0 or Modulo, then master pos is ..." otherwise (in all other positions) you can launch your _getCamLeadingValue

For example, this curve is composed of 5 points, which are X1=0, Y1=Var, X2=50, Y2=0, X3=240, Y3=0, X4=303, Y4=Var, X5=360, Y5=Var, and OffsetX=117,Var =100.0. When LAPosition=420, the value obtained by _getCamLeadingValue is 117.

if LAPoistion≥50 and ≤ 212, the value obtained by _getCamLeadingValue is always 167.

if LAPoistion>212 and ≤ 357, the value obtained by _getCamLeadingValue is always 357.

When I modified value of Var to 90.0, the value obtained through _getCamLeadingValue became correct again.

This is why I think the _getCamLeadingValue command might have entered some kind of bug state.

Software is Scout TIA 5.6

This Cam created by LCamHdl.