Top Height Expression Error

[salvadore.bertolone]

I've been working on automating some toolpath presets and I think I found a bug in the Top Height Expression.  The expression evaluates correctly, but it seems like the CAM Kernel is having an issue with it.  The expression correctly evaluates to 0.0200 in, but it fails to adjust the height, it stays at 0 in.  If hardcode .0200 in, the height adjusts as normal. 

[a.laasW8M6T]

What's the expression?

[salvadore.bertolone]

threadPitch*2

its busted for most reference plane selections, but works correctly when hole top is used.  the weird part is that it evaluates correctly at all times, and the explicit value works, just not when its calculated from an expression.

 

[a.laasW8M6T]

Hi

While thread pitch is an available parameter I don't think its correct for use with the bore toolpath(It does work in a thread toolpath)

If the hole is modelled in Fusion(and has thread data) you want to use 

auto_threadPitch*2  

You are correct I think about this being a bug though, it shouldn't evaluate correctly if the parameter isn't available for that strategy 

@seth.madore 

[salvadore.bertolone]

i use auto_threadPitch in some turning applications, but there are no threads on this hole.  in this case, the threadPitch is referencing the pitch per rotation around the bore from the passes tab, not the thread pitch of a threaded hole.  i coudlnt make this automate from the ramp angle, so i am calculating the pitch from the desired ramp angle in the pitch box on the passes tab.

[a.laasW8M6T]

ahh interesting

Odd that the pitch is called that in the bore toolpath ay(When its not a threading toolpath)

Definitely a bug then I would say

[salvadore.bertolone]

lol my guess is they borrowed some software from another part of the software because the calculations were there and it just always mostly kind of worked.