Curve5ax Mystery - V9.1

[Slick]

We are just now running some files I programmed almost a year ago. As I recal, everything was rock solid, bullet proof, backplotted etc.

Now we have the parts on the machine and WHAMMY! a little glitch that the operator could not have caught on the dry run, the part is scrap.

I put the file on the FTP site, Mc9 Files, "UHOH.Mc9". If backplot it, notice the dive the cutters take on the right hand side, just one little move about 0.250 deep.

 

I've racked my brain on this one, I have 10+ files just like this one and they are all fine. It would be great if someone out there could point out what the heck I'm missing. I'm sure it's obvious, you know how it is, when you stare at something too long everyhting ends up looking fine.

 

Thanks!

[gcode]

Were you having trouble with a chain when you

originally programmed it?

I've seen cases when someone would bump up the chaining tolerance to get through a rough spot.

A year later someone runs the file with default chaining tolerance and the file blows up in their face.

[john316]

.

 

Slick,

I looked at your file. You did have a chaining problem. When I regened it only ran part way down the contour. I closed the chain, regened, and it ran fine. I copied the file back to the ftp renamed UHOH-FIXED.

 

.

[gcode]

You've got an .0008 overlap between the straight

and curve entiies

 

Man... V9 sux!!!

[Hardmill]

quote:

---

Man... V9 sux!!!

---

LOL, Like a time warp eh G ??

 

 

PEACE

[gcode]

I think my original idea was correct.

With the default chaining tolerance of.0001

the curves wouldn't chain

I bumped the chaining tolerance to .001 and it chained and regened correctly

 

V9 really really sux!!

This is the first time I've messed with it in a long time and I don't like it

[Hardmill]

Just did a project in 9 and it it took longer than it

should have, tough going backwards.

 

 

PEACE

[john316]

.

 

Opening the tolerance does fix the problem. The chain ends were about .00025 apart and the system couldn't jump the gap. I chose to close the gap. Either way the cat gets skinned in the end.

 

.

[Hardmill]

I think closing the gap is best, I needed to open the chaining toler. to .0015 for the 2nd path to

stop gouging.

 

 

PEACE

[gcode]

quote:

---

Opening the tolerance does fix the problem

---

That does work, but its a dangerous solution for the reason demonstrated by this thread. A year later, with default settings, the file blows up and junks a part.

I only bump chaining tolerances as a last last last resort.

Having learned this the hard way,I leave a big warning note when time constraints or a cranky chain force me to bump the tolerance.

That way whoever opens the file a year later will know there is trouble ahead

[john316]

.

 

quote:

---

That way whoever opens the file a year later will know thers is trouble ahead

---

And they might not say "what was that bleep-bleep thinking?"

 

.

[crazy^millman]

quote:

---

And they might not say "what was that bleep-bleep thinking?"

---

Think I have already heard that one

 

You are missed!!!

[gcode]

quote:

---

Think I have already heard that one

---

Since the centerline distance of the last fixture I designed was off by 6in, I'll bet you heard waaay more than that!!!

[Hardmill]

quote:

---

off by 6in

---

Sheeesh, Its not like it wuz a mile of sumfin like that

 

 

PEACE

[gcode]

quote:

---

Its not like it wuz a mile

---

It was a Cincinatti 3 spindle gantry mill

I got the blueprints for the machine and used them to design a fixture.

The blueprints said the spindles were 24in apart

Like a dumba$$ I never went downstairs with a tape measure.

The spindles are 30in apart.

[john316]

.

 

Hijack or what, where's Slick?

 

Not to worry Tom. All they have to do is cut the fixture in 3 pieces and position them where they want them. If they want it permanent they can mount them on a baseplate.

 

.

[crazy^millman]

Well it really worked out ok becuase the 3 spindle were off to each other and having them as 3 parts made it real easy to indicate them in to each other.

 

OH BTW sorry for the Major Hi-jack of this thread.

 

[ 05-20-2006, 02:15 PM: Message edited by: Crazy^Millman ]

[Hardmill]

quote:

---

where's Slick?

---

Wiseguy eh ?? :eye gouge:

 

Now you gotta hi-jack our hi-jack ??

 

 

PEACE

[john316]

.

 

nyuk, nyuk, nyuk

 

.

[gcode]

What hi-jack?? We solved his problem (I think)

and moved on...

[crazy^millman]

Yeah but do we know this? Could it be more involved that this?

[Slick]

Hiya Jack... Sorry 'bout the delay. I had a bit of a mishap over the weekend... Mmmmm, Redhook!

Anyhow's, I hear what yer saying on the chaining tolerances, I run mine at 0.0004. That's what has me duped. It chained whe I assigned it. And I have the same toolpath in four other files, and it works fine. Kind of goofy. I tried the re-generate too john, but it regenerates exactly the same.

No worries, I'm putting down as a tolerance issue. Thanks for the input, I appreciate it!