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Strange toolpath trying to cut hex - V25
Hi All,
I'm trying to cut a hex on the end on a small shaft. I'm roughing it using system comp, and finishing using machine comp. The finish pass is making a shape I can't even identify. What I see when I run the simulation is also what I am getting at machine. Anyone seen this before? I've done this in past without problems, this just started today. Nothing on my system is changed. Attached is the V25 file and my post. Any help would be great.
Tony
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Re: Strange toolpath trying to cut hex - V25
Hey guys,
Thanks for all the input. Daughter had to have emergency surgery so I been out a week. Shes doing good.
Rob, of course I have tool offsets set correctly :p Not sure why it works on your system and not mine. I tried it on 2 different PC's running V25. Same result. See the pics. What I see in simulation is what I get at machine. Same bad cut. Notice the green lines for final passes. It is like it is trying to compensate for the starting point of X and Y of each line. I did try and do the contour as you said. Same bad result. I found if I set cutter in BCC to .001" Diameter it seems to work. Why does BCC do that if I have it set to machine comp and NOT system comp? BCC should not care what my cutter is when machine comp is on, right?
There must be a setting somewhere in BCC to adjust this? As I said I made this part before and it worked fine. Now even the old program I used last time has the same bad results. I have not updated anything on BCC since before. Any other ideas?
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Re: Strange toolpath trying to cut hex - V25
Tony,on your second cut use system comp and machine comp.It works and IMO,as Bobcad guy points out,has many advantages.
"Why does BCC do that if I have it set to machine comp and NOT system comp? BCC should not care what my cutter is when machine comp is on, right?"
It evidently does.
I usually never use machine comp,as I have computer right at machine and usually only making 1 or 2 parts.I will just edit program,BUT if I do use it I always use system comp too.Here is one big thing I always worry about if only using machine comp,what if I have a big number left in the registry from a previous job and I forget to set it right on the next job ?????If I am using system comp also the number will likely be small from job to job.
Re: Strange toolpath trying to cut hex - V25
Yeah I have PC at machine also. Just going to do this with system comp. Was just hoping that someone would know whats wrong here. I made this same part 2 months ago and it WORKED fine. If it worked then, why not now? That's what's making me crazy.. hehe. Maybe someone from BobCAD could look into this. Al? Anyone? :D
Re: Strange toolpath trying to cut hex - V25
I got different results today with your file than I got when you 1st uploaded it.Rob seems to have too.Consistency seems to be not.
OK,the old file worked in preditor and not simulation.That was done by using contours and circular lead.
Without the circular lead it is showing not good in preditor,But if you system comp with manual comp all the bad goes away in preditor and simulation.
Moral of story,if you use manual comp.,also use system comp.???????