Opti-rough "pecks" in rapid?

[AshM]

This may have been covered already but,

 

Using MCX5 with an opti-rough toolpath I've programmed the clearance plane to incremental 2.5 (mm) with a full vertical retract....

 

On the first move of the operation after the tool change the tool moves down in rapid to 2.5 above the first cut depth - below the top of stock, then in rapid back up to above the stock, then feeds back down the first cut depth and proceeds to get on with it. So it basically does a little "peck" in rapid moves to whatever incremental clearance I program above the first z cut depth, then feeds in as I expect it to.... can anyone explain this to me?

 

I can get rid of the "peck" by changing the clearance plane to absolute anything....

 

I can see the "peck" happening in slow motion in Verify but not in Backplot. In backplot the first move is the feed move not the 2 rapid peck moves.

[Tyler Robertson]

What's your feed entry? any way you can ftp/post/send the file?

[neurosis]

Ive seen this in the 2d dynamic core as well.

[AshM]

What's your feed entry? any way you can ftp/post/send the file?

 

In this case I have a plunge feed of 5000mm/min because the entry is outside the work running using core milling passes - but the "pecks" are in rapid G0 in the output post too, so its not using that rate. I'm also using no vertical arc entry or exit.

 

operation 12 is the one.

 

0020497_A3123B_2 - BLENDED.zip

 

EDIT: Thanks in advance for the help!

[Chris In-House Solutions]

AshM are you using MU1? There were some changes in the toolpath's defaults between X5 and the Maintenance update. I will download this tomorrow when I get a chance and take a look at it on my system at work. If you haven't downloaded MU1 it would be work trying... just make sure you maintenance date is later than April 27, 2011 before downloading it.

[AshM]

Funny enough MU1 is on my to do list.... we let our maintenance lapse when MU1 was released, so it wasn't ever installed. We have just gotten back on the band wagon, but I made the choice to wait for X6 because we were right on the cusp when we signed back up and I couldn't see the point in going from X5 -> X5MU1 -> X6 all wihin a month or so, but now from everything I have read about X6 I'm swinging back toward MU1 again....

 

Please take a look when you can let me know if you find anything, or if MU1 will sort it out. Thanks again in advance.