Why are my 5 axis paths gouging?

[Bruce Caulley]

Hello all,

I have a project that involves modelling the fanciest 5 axis part I can and then taking video of it being machined. I have started the programming and have found that MC is gouging when verifying swarf, curve, 5axis flowline, 5 axis Msurf. To see if it was just the complexity of the part I was doing I did a quick model of a vane and put a couple of toolpaths on it. Verify shows the tool gouging out the lower back section. If you ignore the op that is in the file as this was just me fiddling, can anyone else get good verified motion around this part.

 

Any help appreciated.

 

Bruce

simple vane

[Bruce Caulley]

bump

[Greg Williams]

Bruce,

 

Have you tried adding a check surface to see what happens

[Bruce Caulley]

Greg,

 

 

For the swarfing and 5 axis curve paths I added the drive surface as a check and told it to leave 5 microns on the drive to see what would happen. It broke the path into a few different segments and would not machine the parts that were gouging beforehand. That is what is annoying me, MC knows that it is gouging these walls but isn't correcting itself.

 

For the 5 axis surface paths I have tightened up the tolerances to th Nth degree and the paths take a couple of hours to regen. When posting it says "Instability found. Retracts added" or something similar.

 

By turning the output to 4 axis I get a good verify with a 2mm step over, but as soon as I drop it to 0.1mm for the real thing it gouges in verify again.

 

These samples are for Rolls Royce jet engines, so I can't make a xxxx up out of it.

 

Bruce

[DavidB]

Bruce,

Does it gouge in Vericut with the posted code?

 

Can you do that 1 toolpath in V9 see what happens?

[Bruce Caulley]

I haven't got that far yet David. Backplot even shows it gouging. I'll give it a go in V9 and see what happens.

 

Bruce

[Bruce Caulley]

Ok, I tried a 5 axis Msurf in the same model in V9(not the one I linked above) and it worked fine.

 

I know those that use this toolpath must be few and far between, but someone on here must have used it on X if not during Beta then just out of curiosity. Can anyone give any advice? Or should this be a QC issue?

 

Bruce

[Greg Williams]

Bruce,

 

I would start with QC.

[gcode]

Bruce,

I decreased the Chord Height to .005 and Maximun step to .05 and got better results.

Its still gouging in places and sending it to Qc would be a good idea

[Bruce Caulley]

Thanks all, I'll send it off in the morning.

 

Bruce

[Bruce Caulley]

I sent it to QC, but other than an outomatically generated reply I have heard nothing. These toolpaths also seen to regen faster in V9 also.

 

If QC are swamped, how long before I should start pestering them?

 

Bruce

[DavidB]

Bruce,

I have sent many a thing to QC haven't heard 1 reply.

I think its better to send to Bob (reseller) and he will send it of.

 

On the other hand the CNC post department are fantastic! I get a reply next day always, and they always have had a fix.

[Bruce Caulley]

Early on in the X release I sent a few things through and had replies the following day. They must be in Xmas mode.

 

Bruce

[Bruce Caulley]

For those that may be interested, QC is working on this now.

 

Bruce