Rotary Question

[tsewyek]

Good Morning All, I do very little round work on the horizontal and have a slight problem with a file I've placed in the MC9 folder on the FTP site, named 2274888 OP5.MC9. The problem is mainly with the last tool a 3/16" end mill to interploate a slot on the cylinder, and does not look right in backplot. I can't see right now what I'm doing wrong, any help would be greatly appreciated.

 

Thanks

[Don S at Barefoot CNC South]

Hi

I opened that file, it looks like Z 0.0 is bottom of the part and all your depths are in absolute -1.825 and so on unless I am missing something.

[tsewyek]

First of all, thanks for your reply Don, secondly let me apologize for wasting your time like that, it appears that I posted the wrong file to the FTP site, I was a little confused by your reply so I double checked. The correct file is there now!! Please accpet my apologies!!

[jplecan]

Walt,

I think you'd want to make your tool/const. plane from the back (#3), not front for that operation. Then after posting, it should give you what you want after a 180 deg rotary index.

Jim

[Guest]

Good rule of thumb. Least it works for me.

 

Whenever it appears you are going to need to use either the bottom or back construction/Tool plane, create a new plane do not use the sytem planes. I have seen many issues with using those 2 system planes.

 

MCam can get confused on the rotations of those 2 planes.

 

JM2C

[Don S at Barefoot CNC South]

You need to change your c plane and t plane to back or #3

[Slepydremr]

Also, after you change your t/c plane you will have to reverse your chain and offset direction or it will be cutting on the outside of the slot.

[Don S at Barefoot CNC South]

I noticed the offset needed to be changed as well sleep good point

[tsewyek]

Thanks very much to all who responded, I just got back to work lucky me, my employer allows me to come in and work as much as I can stand! I will work on correcting the problem with the file in a bit, Thanks Again!!!