High Speed Rough Gouged

[ERIC14779]

The X3 MU1 High Speed Rest Rough gouged my part even with 0.050" stock to leave I was using a solid for starting stock (not a simple rectangular block).

 

WTF !!!

 

on an area about the size of my palm on a mold 32" x 37" x 14" tall.

 

Is this a problem with the High speed toolpaths ??

 

Verify looked Great !!!! part ended up not so much.

[TK-32™]

ouch!

[Guest]

Eric,

 

On your retracts are you using Full Vertical retract or minimize retract?

 

I always use Maximum, there are various machine conditions that backplot/verify can not replicate that may result in gouges. I have also had conditions that CNC could not replicate or see but clearly on the machine resulted in gouges, I wound up using a Surface Rough Pocket instead, which did not gouge.

[ERIC14779]

No what I mean is that the roughing passes were actually below (inside) the drive surface.

 

 

the general area inside the red is where it screwed up.

 

seems simple enough ???

 

[Guest]

I would suggest going into the control panel >> X utility and turning off support for the new arc filter.

[Rick46]

kind of looks like your machine may be dog legging on its rapid retracts from incremental heights.. some machines cant do a straight rapid move so they do what is called a dog leg and thus u get a gouge in the part even though it shows straight rapid in your backplot..only way around this is force your rapid to a height above your workpiece or map your rapids in your post to output linear feedrate moves instead of G00 rapid moves..

[gcode]

Hi speed surface toolpaths hace G01 rapid option

on the linking page... no need to edit the post

[Rick46]

good point g code.. been a while since I used the surfacing side of mastercam .. mostly use the 2d options now for we have a seat of Work NC I use for most of my 3D milling options..down to only one CNC guy (me) and now I have learned to use the work nc and its pretty slick but for on the fly editing mastercam cant be beat in my mind..always have a need for it and the 3d side is good too but just using new toy available to me for the time being..lol.. wish work nc had a forum like this one but to no avail.. but this forum has and always will rock..

[ERIC14779]

Ok guys here is what I found:

 

first these were constant Z Rough and finish high speed toolpaths. No rapids just around and step down and around and down again... and again....

 

I was using a imported Solid ( .X_T ) from SW 2007 that did have some "issues" (faces sticking out like untrimmed surfaces)

 

When I created Surfaces from Solid faces to do some pencil toolpaths they were cutting in to the finished surfaces. (from the solid)

 

So I started thinking maybe the solid was creating a bad toolpath (too far out)

 

So I used the surfaces that I created from the solid faces with standard contour surface finish and re cut the bad area and ..........

 

 

All is good everything cleaned back up.

 

 

 

only thing I can figure is that there was something wrong with the Solid ???

[gcode]

So there was nothing wrong with the roughing toolpath??.. It was the finish toolpath leaving too much stock?.. That makes sense. The right hand cutout does look too shallow when compared to the one on the left.

[ERIC14779]

Gcode

 

No both rough and finish from the SOLID were bad.

 

Surfaces from solid face were GOOD.

 

I refinished using the Surface from solid face and the surface cut proper.

 

they look congruent on the screen but the solid cut further OUT and the surface cut IN where it should.

 

 

 

kind of scary what if the solid cut the other way ???

 

[gcode]

If you can , make a zip2 go and send it to qc

[ERIC14779]

here is a pic of the final cut made with the surface from solid.

 

 

[ERIC14779]

that email is

 

[email protected]

 

right ???

 

My ZipToGo file is 15MB will that email ??

[gcode]

the address is right..

a 15 meg email is pretty big..

Some ISP's will take one that big others won't.

All you can do is try..

You can also upload it to the ftp and email

qc with the filename and desription of the problem.

[ERIC14779]

We have a Gmail corp. account I will try to send.

 

I ref. this thread for the pics.