Select Machine Achievable Toolplane Error??

[Scott Garrison@Weiler Engineering]

I'm just getting into mastercam for our Horiz. boring mills and am experimenting with the work offsets & post yada yada yada...

 

I created a block that I face milled 3-sides, the top and both ends to test the post. When I post

I get this error message:

 

"Select Machine Achievable Toolplane Error with Y-Axis along machine Y - Set & Repost"

 

I have set my planes correctly as far as I can tell with the Y-axis of all 3 planes going along the World Z-axis.

 

I thought the machine def was screwed up but that looks ok with Y+ set to the world Z+ direction.

 

What's strange is the code looks fine. Work offsets and all.

 

Anyone get this error before?

[Scott Garrison@Weiler Engineering]

Also, I forgot to mention I'm using the MPMASTER POST.

[Guest]

Scott,

 

do you have your planes set as fback or sides.

 

You should be working on the side and rotation around the plane

[Scott Garrison@Weiler Engineering]

I'm milling in the front, left & right planes.

 

What do you mean rotation around the plane?

 

I believe my rotation is around the world Y-axis

 

like it is set in the machine def.

[Guest]

No, your rotation on the MCAM screen will be around Z.

 

In your post it will be mapped to be output properly.

 

That;s likely why you are getting the error, the post cannot achieve what you have programmed

[Scott Garrison@Weiler Engineering]

I'll try it in a different orientataion.

 

Thanks.

[Scott Garrison@Weiler Engineering]

Do you mean the world z? I've got it set up that way. All of my planes are 90 apart around the world Z.

[gms1]

You should have toolpaths that go like this.

 

WCS=Top

TPlane/Cplane = Front

Tplane/Cplane = Right

Tplane/Cplane = Back (or left depending on how you rotated)

[Scott Garrison@Weiler Engineering]

Hey, that did it! Thanks!

 

I had my wcs set to the planes I created (copies of front, left & right. The back of the part would be in the vise.

 

The only thing is I get an rotation limit exceeded message.

[Scott Garrison@Weiler Engineering]

Got it, seems the limits in the mach. def for the rotary axis were all set to 0 for some reason.

 

Thank you much! I think I'm on my way to understanding these how these planes work. I even had training at our reseller and the trainer couldn't give me a good explaination of how they work.

 

BTW, he was just recently fired, no big suprise to me.

 

Thanks,

 

Scott

[Scott Garrison@Weiler Engineering]

Got another question, no matter what the machine def is set to for that B-axis, I cannot get a

B-90. i always get B270. I thought if I selected signed continuous or signed direction I would get a B-90. Is this a change I need to make to the post?

 

Thanks.

[Post dept]

Search for a switch called one_rev. Disable it. One_rev sets all indexing output between 0-360. It's only applicable for indexing ops though.

 

Reason behind your tool plane error:

 

3/4-axis posts do not do any mapping. Code is supplied to the post already mapped. This mapping is done before the post gets hold of the coordinates.

 

For horizontal machines the table rotates about the machine Y, so Mastercam rotates your current toolplane about it's Y around to the base plane (that's the front where the tool comes from).

 

For verticals, same thing. The current plane is rotated about it's own X (because the machine rotates about it's X). This becomes a problem on the back toolplane. It's X faces the opposite direction. So, you must rotate it 180 deg (to gets it's X to line up with machine X) then Mastercam's mapping will work for you.

 

Sound confusing? It is.

 

5-axis posts don't work like this. you can just pick any plane you like and it just works. This is because all mapping is done in the post so we've got a little more control over it.

 

Brett

[Scott Garrison@Weiler Engineering]

Brett,

 

my post is this:

one_rev : 0 #Limit rotary indexing between 0 and 360? (0 = No, 1 = Yes)

 

should it be set to 1? does 0-360 exclude negative values?

[Scott Garrison@Weiler Engineering]

Brett,

 

what do I set this to in order to get negative B-values?

 

rot_type : 0

 

#Rotary type - 0=signed continuous, 1=signed absolute, 2=shortest direction