I miss it? Or Verify miss it?

[Bill Henderson]

Running X6 Surface High Speed Core Roughing.

 

Ran the verify with the the roughing and finishing tool paths and I found no issues.

 

However, the rapid moves in certain areas gouged my part.

 

The part shape is a Convex shape 8" x 13" with about a 22 inch radius swelling up in the center.

 

That little piece of Metapor ran about 500 bucks.

 

is there a setting I missed on verify to show rapid gouges?

 

here is what I had it set to (tool parameters).

 

I am asking a question. I am not asking for piling by anyone about the software.

 

Thanks

[K2csq7]

Can you see it in backplot?

[Goldorak]

if it gouge the part at feed rate , verify won't tell you, if it's rapid , you will get a warning

 

work with feedrate transitions can be dangerous

[Bill Henderson]

No. It doesn't show it violating.

 

At first I thought the material may have chipped with a rapid move going thru an area that had heavy stock, but it looks more like a cutter gouge.

 

Material does chip easily though.

[Bill Henderson]

I normally force a full retract, but in a rush yada yada yada.

[Bill Henderson]

looking from the bottom of the surface.

[Saultspics]

What is keep tool down set at?

 

Does your machine rapid in a straight line or in the shap of a dog leg?

[gcode]

do an experiment

 

MDI

 

G0 G91 X10. Y5.

 

a machine that doglegs will rapid at a 45 degree angle to X5 Y5 then run in a horizontal line to X10

 

if your machine does this you have to make sure you're in clear blue sky when you rapid or you risk crashing into the stock.

Verify will NOT show these crashes as verify rapid motion is a straight line ..

 

When you are using the new high speed toolpaths you can force G01 rapid motion and that will eliminate this problem

[Bill Henderson]

What is keep tool down set at?

 

Does your machine rapid in a straight line or in the shap of a dog leg?

 

 

Do not see a keep tool down on any of the parameters for that toolpath.

 

I see .156 distance form stock and 1" absolute. top of part is Zero.

 

Straight moves in my rapids.

[Thee Rickster ™]

Bill, see if minimum distance will work for you.

 

I had that problem many moons ago and only use min distance sith a 500. feed and

no crashes resulting from that method

[Bill Henderson]

So Rick you mean use minimum distance instead of minimum vertical retract?

 

I can try that on a cheaper piece of 6061.

 

The next block is going to be full vertical retract.

 

Thanks.

[Bill Henderson]

do an experiment

 

MDI

 

G0 G91 X10. Y5.

 

a machine that doglegs will rapid at a 45 degree angle to X5 Y5 then run in a horizontal line to X10

 

if your machine does this you have to make sure you're in clear blue sky when you rapid or you risk crashing into the stock.

Verify will NOT show these crashes as verify rapid motion is a straight line ..

 

When you are using the new high speed toolpaths you can force G01 rapid motion and that will eliminate this problem

 

Gotcha. It does dogleg.

 

That would explain it.

[Bill Henderson]

I should have remembered that Tom.

 

Such a dope.

 

Been bitten on Fadals once.

 

I have posted G1 out at high feed rates and these old Haas do not like them.

[Thee Rickster ™]

Minimum distance get the dog leg out. and put the highest comfortable feed

you trust. 500. feed here(output feed move)

 

I am using high speed Hass, when I have to use the VF6 it is not high speed and

I use 220 feed/minimum distance for the out put feed move

 

Have your part clearence on the same page at say .150"

[Thee Rickster ™]

only down side is if you go to change common parameters and change your retract

height, it changes that part clearance value.>>

.

.

.

Rick

[Guest]

Turn on full vertical retract.

 

I despise the setting you used, the machine can make moves differently than the intent when posted.

 

remember when in rapid, a machines axis' can arrive at the end point at differing times. This is because of the way controls process rapid motion.

 

When feeding, all axis' must arrive at the same moment.

[gcode]

I think that Haas has a parameter you can change to force straight rapids.

Its been over a decade since I ran a Haas so I've not sure.

[Mr. Wizzard]

1st time it happened to me was 5 years ago, on a Haas. Yes, they dogleg. Not sure if you can change a setting for that. It's been Full Vertical Retract ONLY ever since.... Same thing, verify won't show it, but a broken endmill and F'd up part are pretty clear.

[Saultspics]

We use output feedon our Haas.

[Thee Rickster ™]

Turn on full vertical retract.

 

I despise the setting you used, the machine can make moves differently than the intent when posted.

 

I have used full vertical retract method for ever.

MC has such a poor zig zag and keep tool down(even with optimize 'on') that I started using min distance and

now save up 20% time on long tool paths.

 

Its the waterline rest that will have thousand of retracts even if you pick zig zag and keep tool down

with a 1", setting.

 

i change those paths to min distance and not only do you save wear and tear on a machine

you also get serious time savings

 

If the zig zag would Actually work properly with 'keep tool down and optimize order', then and only then

would full vertical retract would be the path of choice.

[Mr. Wizzard]

agreed^^^ A minimum retract/distance, followed by x/y movement toolpath would be more usable than the x/y/z given, since it gouges. My question is this: are other machines gouging with the same settings or is changing to a feedrate giving better results on min. retract?

[Bill Henderson]

We have 8 HAAS and everyone is a different year. I never know before hand what machine it will end up on.If it is an older one I kept having to change the feedrate output to a gut wrenchingly low number 150. I started using the full vertical retract... a lot of time the parts are so small you can hardly see any time difference seeing I use a very short entry exit loop.

 

This particular was large by our standards and I just had a brain fart not realizing (remembering) the dogleg. Completely my fault.