Rotary direction callout

[jeff]

My post processor doesn't take the shortest route for my rotary and I don't know why.

Starting at A0, doing 5 pockets around a diameter equally spaced.

Instead of the post spitting out A-72. degrees, it gives me A288. degrees, and then to get back to A0 it takes the long way again.

In my machine definition, I have the A axis set to Shortest Direction.

What am I missing?

 

Using MpMaster for X5.

[Guyinthedesert]

do you have mnisc integer set for positive moves?

[jeff]

I don't use them, I have the box ticked that says Automatically set to post values when posting.

I also don't see one that would set for positive moves, unless it's worded differently that what I'm looking for.

[MIL-TFP-41]

try changing the Axis Type to "Signed Continuous"

[jeff]

try changing the Axis Type to "Signed Continuous"

Tried that, no dice

I've tried virtually every combination I can think of and it still doesn't go to -72 degrees, for some reason it wants to go all the way to 288.

[crazy^millman]

Jeff I would assume that is where you put your plane at when you starting making the toolpath. Can you try your plane in a different place to see if that makes a difference?

[Guyinthedesert]

What post are you using? Also, is this a 4x or 5x setup?

[jeff]

What post are you using? Also, is this a 4x or 5x setup?

MpMaster for X5 and it's a 4th axis setup

[jeff]

Jeff I would assume that is where you put your plane at when you starting making the toolpath. Can you try your plane in a different place to see if that makes a difference?

Not sure exactly what you mean.

I'm using Top plane for all 5 places, with Tplane and Const plane rotated for each location about the Origin.

[jeff]

Here is my file.

 

If I'm doing it backasswarsds let me know! lol, I'm new at 4th axis stuff, it's only been a couple of months and a handful of jobs.

XXX.MCX-5

[Guyinthedesert]

It's doing the same thing here, first index is -72.

 

I tried changing the minimum travel limit to -1 in the MD, stil outputs neg, so I'm thinking it's in the post.

[jeff]

It's doing the same thing here, first index is -72.

 

I tried changing the minimum travel limit to -1 in the MD, stil outputs neg, so I'm thinking it's in the post.

That's what I'm trying to achieve is the -72 instead of going from 0 degrees to 288 degrees for the 1st pocket.

[jeff]

It's gotta be something in my post, because if i switch to the default 4 axis MMD and the post that comes with that, it comes out how I want.

[crazy^millman]

Jeff then re download the MPMASTER and try that.

 

HTH

[jeff]

Jeff then re download the MPMASTER and try that.

 

HTH

 

Just did, and it works.

When I modified my MpMaster, I was careful only to remove stuff such as line numbers and other useless crap.

At least I thought I was.

[jeff]

Got it!

Changed these 2 lines to match the default and now it works.

 

ret_on_indx : 1 #Machine home retract on rotary index moves, (0 = no, 1 = yes)

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

[duckdogers]

I don't do a lot of 4rth axis stuff but I have the same problem just learned to live with.Where do I find my post to make that change