DID you put in the offsets here? 

--Scriber X,Y,Z offsets
   scriberX = -4.803
   scriberY = -.250
   scriberZ = 2.


If those are the correct offsets DID you use a tool# greater than 100 ?? The post will only add the offset values IF the tool#>100 SO IT HAS TO BE AT LEAST 101 or greater.


THe M8 delay(;-) HUM This is the section that deals with that part, but I am not fluent in SC post speak. You may have to ask that on the Sheetcam forum. ALSO it depends on how you have the G4 setup,as sec or Msec??

function OnPenDown()
   if(tool > 100) then
      post.Text(" M08\n")           
      return
   end

Just for reference, the values you need to enter are in MM, not inches.  I just got my scribe operational today using the scriber post, and it works fine.  However it didn't at first until I realized that it wanted metric values. 

In my case if you're looking at the torch head on, my scribe is to the left (2.316 Y+, .077 X-.  My values are those numbers converted over to MM, and then reversed from positive to negative.

So my Y number is negative in the post and my X is positive.

--Scriber X,Y,Z offsets
  scriberX = 1.195
  scriberY = -59.85
  scriberZ = 0

Use a tool of 101 and above in Sheetcam.  I set my engraver kerf to around .021 using a carbide tip.