Not machining to verify.

[Sandybar]

I have had this happen several times I don't know what the answer is so here goes.

 

I'm doing a High speed area clearance tool path. In verify it looks great. when i machined the part it went right through the wall. I suspected that it might be in my CD under arcs "break at quadrants" but that does not seem to be it. It appears to helixing in but outside the wall.

 

Has anyone expericed this also?

 

X4 MU3

[peon]

Is your retract height set above the part? Verify will not display rapid moves.

[Sandybar]

Retract is .600 above the part. In the linking parameter top of part is 7.3 and I have the clearance plane is at 7.9

[Jmick]

In the linking parameters do you have output feed moves selected and the maximum feedrate for the machine filled in. This will make the machine move as if you see it in verify and not move to the next position in a 45 deg. and then linear movement to get to next position.

[Sandybar]

No, I have the minimum distance travle check box on. How about the in the cut Parameters Box the keep tool down within box. do you use % of tool diamter which defaulted to 2099% of a 3/8" diameter cutter.

[Jmick]

I have minimum vertical retract selected. output feed move @500 and 1667% of tool dia.

[cobra95kev]

Sandybar,

You are not alone, I use this toolpath quite a bit for clearing pockets and I would say this happens roughly 5-10% of the time. Luckily I have vericut where I work and it has never made it to the machine. I have not been able to track down an exact cause for it yet but most of the times I go in and tweak the arc filter settings a couple of times and it goes away. It seems like it wants to swing a arc the wrong direction.

 

If I didn't have reliable g-code verification (which it sounds like you do not) I would not run this toolpath. I do think it still goes back to the arc filter. Wish CNC could figure this one out. I think this should show up in a generic g-code backplotter, you should try and get a hold of at least a basic one.

 

 

Kevin C.

[Stan_z]

NC PLOT for $300 bucks..Its helped me many time.Good nc dode verification!

[Matthew Hajicek - Singularity]

NC Plot is a great tool for the price, but it isn't verification. It's a backplotter. It's a backplotter that will handle five axis code with Macro B and nested subprograms and pretty much anything else you can throw at it, but it'll still only plot the results. Now if only we could feed NC Plot's results into Metacut View...

[Chris Rizzo]

Yes, there is a fanuc oi machine that I've ran into this before....literally ran into. Resolved it by allowing 360 degree arcs and NOT breaking them. Run for the past 10 months without a problem. All 3d mold work too.

 

hth

 

curious, what machine is this?