One tool, need two rpms

[archer]

Hello everyone!

Got another question.

We are running a Fadal VMC 6030 machine and seem to have a bit of trouble getting our post processor to reconginze two different RPM's for one tool. An example is say doing a contour w/ an endmill and roughing first at 10000 rpms. We would then make another contour operation using the same path and slow the rpms down. In our posted file, it changes the feed rate, but does not change the rpm's. What in the post needs to be changed? Does it have something to do with the following?

 

pss # set rpm to ssmax

if ss > ssmax, ss = ssmax

savess = ss

ssrigid = ss + .2

if rigid = 1 & opcode = 3 & nextdc = 3, n, *ssrigid, "M5M90", e

else, n, *spdlon, *ss, e

 

Thanks again for everyone's help

[Storkman]

It should be in the null toolchange. You may have to force the spindle speed, but it should pick it up normally if it is in there.

[d00d]

I would make a tool change with the same size endmill in the slower operation and set rpms and feedrate under parameters. That would be an easy quick fix.

[Jimmy Wakeford from Barefoot CNC]

check to make sure that in the ptlchg0 section that it is looking for the ss.

If you cant get it email it to me and I'll take a look at it

 

[archer]

storkman, I'm not sure what you mean, and dood, that will work but if seems more of a hassle. Shouldn't there be a way to edit the post to see the different rpm's like it sees the different feed rate?

[Storkman]

Yes, null tool change is ptlchg0, like Jimmy says. Follow his directions, he knows his way around. That portion of the post is for different operations using the same tool without a toolchange. You can email to me also if you like.

[archer]

This is what i did. That worked great. Thanks alot for the help! Jimmy, when are you coming around?

 

ptlchg0 # Null tool change

psgwcs ,n, ss

if fg1014 = 1, n, pindex, e

[Storkman]

Glad you got it to work.

[Jimmy Wakeford from Barefoot CNC]

I'm thinking round X-mast(x-mastercam). I'm getting ready for the X seminars right now so it should not be long.