Need optirough and dynamic mill advice

[peon]

Please see the attached pic. I am having some issues with the cutter snapping in the area shown. I'm sure a few others have seen this and would love to hear some advice to prevent this from happening. The current part shown will be run again tomorrow with a reduced stepover from 6% to 5% and a stepdown limited to .750" DOC rather than 1.2". I will post the results.

 

[Joe788]

I had a similar to problem to this on a few parts last year. Ugly but easy way to fix it is to drill a few holes right where that web is going to be before you start the Optirough path.

[neurosis]

Please see the attached pic. I am having some issues with the cutter snapping in the area shown. I'm sure a few others have seen this and would love to hear some advice to prevent this from happening. The current part shown will be run again tomorrow with a reduced stepover from 6% to 5% and a stepdown limited to .750" DOC rather than 1.2". I will post the results.

 

 

This is a definite flaw in the path. Ive had this happen a few times. Hopefully the new improvements that David Conigliaro is talking about will address this issue.

[Tony35]

peon

what about doing 2 shots with 2D dynamic instead to get away from this

rough the part in 2 halves and get away from the thin wall unless you need that feature

peel mill 1 side dynamic the other is another option

just thinking out loud here

 

if you need more help shoot me a email and i can give you my new EXT

[peon]

Ok, the stepover and stepdown reduction did the trick, but it is hard to watch the cutter whip around that thin sliver of steel. Tony, that was my backup plan, only problem is that I would have to attack the leftover material above those levels before I could attack the remaining steel below. Adding several operations is more programming and machining time when I feel it should all be done in one operation. So far I'm pleased with the Optirough path, but you certainly have to verify the program and use it at your discretion. Neurosis, hopefully the bull nose recognition will be available soon. That sliver in the pic is actually .750" tall (cutters DOC) before it starts machining the next level.

[peon]

Just as I sent my last post, the cutter broke in another thin area on the third part. The optirough path will be abandoned till some improvements are made.

[peon]

I sent these pics and a .z2g file to my reseller. Hopefully the bull nose mill support will alleviate these problems. I will wait till some improvements are made before I try the Optirough again and wait for some of the steam to blow away resulting from the broken cutters. I honestly think the toolpath just needs a little tweaking and all will be good.

 

 

[Tony35]

peon

just another reason im not using X5

thanks for the feedback

[David Conigliaro CNC Software Inc.]

Can you please send me the file in question. Our Dynamic motion programmer has requested it...

[peon]

Certainly David. On its way to QC.

[chipman]

This topic is old, but I think the problem still exists.

I am a big fan of Dynamic, but 95% of what I cut are long parts, which makes this type of sliver appear often.

Anyone know if these types of issues have been resolved or if some work arounds exist?

 

[jlw™]

I have only seen this a few times.  When I do, adjusting step over usually does the trick.  Dynamic mill is my goto path.  I know it's kinda the opposite principle but it works great with high-feed mills as well.

[Teh Bear without Brains kinda idiot]

Use conventional direction of cut and thus the thin wall will be pushed out instead of been 

pulled under the mill

I ve seen it lots of times  before and it helps to use conventional

 

BR

 

[gcode]

On ‎6‎/‎30‎/‎2017 at 0:42 PM, chipman said:

This topic is old, but I think the problem still exists.

I am a big fan of Dynamic, but 95% of what I cut are long parts, which makes this type of sliver appear often.

Anyone know if these types of issues have been resolved or if some work arounds exist?

 

MC2018 gives you the option of Climb, Conventional or ZigZag

When zigzag is selected, you can  also define a climb and conventional feed rates

[Tim Johnson]

5 hours ago, gcode said:

MC2018 gives you the option of Climb, Conventional or ZigZag

When zigzag is selected, you can  also define a climb and conventional feed rates

2017 gives you this also

[White Feather]

Something I have done on occasion to get around this issue...

 

Probably not the best solution, but it does work.

 

 

testing.mcx-9