Haas 4th axis rotation direction

[Mike Whitten CAD/CAM Contractors]

Hello,

 

I am working with a Haas VMC that has a Haas 4th axis installed. The machine is about 10yers old. The rotation direction is backwards. Would anyone have an idea of how to reverse it? It seems like it would just be a setting or something.

 

Thanks in advance,

 

Mike

[Leigh @ Kodiak]

My rotary table manual says Parameter 11 (57)

If you can't figure it out, post again here and I will type out exactly what it says in the book.

[Jayson Kramer]

Mike the post would be easier then the machine.

[Hardmill]

quote:

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Mike the post would be easier then the machine.

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Gotta agree with Jayson.

Youll hose any existing progs they have

if you switch now.

 

 

PEACE

[Guest CNC Apps Guy 1]

I'm with Jay. Get the post to do it correctly because otherwise you'll have 10 years worth of programs to go through and change. It is a setting in the Machien Def. Open it up, double click on the B Axis and flip the direction.

 

That should do it if CNC did MD/CD correctly.

[Colin Gilchrist]

+1 more to changing it in the MD/Post. I've done it a bunch.

 

Can't you just flip the A axis around on the machine? Then it would be facing the right way

[Mike Whitten CAD/CAM Contractors]

I appreciate the help everyone. I know how to change the output. It's very easy. You all are right, I will change the post / MD.

 

Haas > the most non-standard standard machine. LOL

 

Thanks all!

[Guest CNC Apps Guy 1]

I don't know why they choose to incorrectly refer to their "A" axis as "B" axis. That just chaps me. Hello... McFly... X,Y,Z,A,B,C. It's how it's supposed to be.

[Leigh @ Kodiak]

We program it as the A axis on our Haas

[cobra95kev]

I think James was referring to the horizontal Haas with rotary. Those are incorrectly labeled as "A" instead of "B".

[Guest CNC Apps Guy 1]

Yes. Kevin said it right. See... it irritates me so bad I can't type straight!

[Jayson Kramer]

ok james give the bong back.

[Matthew Hajicek - Singularity]

Our Haas indexers can be parameter set to go either way and use either address letter.

 

One case where it would be better to change the machine would be if he has other machines that share programs with this one and they have their rotary axis the right way around.

[Mike Whitten CAD/CAM Contractors]

Hello Matt,

 

I ended up changing the Machine def. It just seems to me that it would be best to have it respect the normal right hand rule. I don't get why Haas does this.

 

Thanks for the info.

[cobra95kev]

Matt or anyone,

Do you know if it is possibel to change the A axis to a B-axis on a Haas HS1?

 

Thanks

[Matthew Hajicek - Singularity]

Sorry, couldn't tell ya.

[kunfuzed]

quote:

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Haas > the most non-standard standard machine. LOL

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Somebody's never run a Hurco before!

[buck30]

in regard to this. what direction do you look at the 4th axis to decide if it is turning clockwise or counter clockwise??

 

I to had this problem and tried to change the direction on the rotary axis page in MC. as far as i can see this button did nothing at all,

 

but yeah the place to change it is in the post.

[Mike Whitten CAD/CAM Contractors]

buck30,

 

google "right hand rule CNC".

 

There is also a note in all modern Mastercam posts:

 

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Rotation direction around the part is positive in the CCW direction when viewed from the plus direction of the rotating axis.

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[[email protected]]

Seriously why doesn't Haas follow right hand rule. when I started at the shop im at now they had two vf2 with the small haas 5th axis trunnions(TR200Y). They both rotate backwards i.e. positive rotation on A axis brings the bottom of trunnion up toward operator and the platter faces toward back of the machine. But now I Have to program for our larger 5th axis trunnion(TRT160) on the VF4 and positive rotation is opposite of what are smaller VF2 machines do. What do you guys suggest? As of now after reading this post from 12 years ago my plan is to just make a copy of my current post, CD and MD then rename and reverse it in the MD.

[crazy^millman]

4 minutes ago, [email protected] said:

Seriously why doesn't Haas follow right hand rule. when I started at the shop im at now they had two vf2 with the small haas 5th axis trunnions(TR200Y). They both rotate backwards i.e. positive rotation on A axis brings the bottom of trunnion up toward operator and the platter faces toward back of the machine. But now I Have to program for our larger 5th axis trunnion(TRT160) on the VF4 and positive rotation is opposite of what are smaller VF2 machines do. What do you guys suggest? As of now after reading this post from 12 years ago my plan is to just make a copy of my current post, CD and MD then rename and reverse it in the MD.

Depending on the post is should be just a simple switch to change that output direction and everything you do for one would just need that switched changed to work for the other. Yes this will require the MMD and CMD for that post to do what you want, but you start swapping things without a clear understanding of what it will do and it can create a nightmare really quick.

[Colin Gilchrist]

https://www.haascnc.com/service/troubleshooting-and-how-to/how-to/reverse-rotary-direction-setup---ngc.html

You could always reverse the direction of the Rotary Axis.

One thing you will see on the Next Generation Controls > In order for TCP and DWO to work properly, you must setup the Rotary Axes to match the ANSI/ISO standard directions. This means "A > Rotates on X", "B > Rotates on Y", and "C > Rotates on Z".

[[email protected]]

I wish we had next gen controllers...how do you reverse it on older Haas machines? Anyway I will only make the edits myself if I am confident otherwise I'll reach out to reseller's support.

[pete_hull]

On 6/2/2009 at 12:11 PM, Guest CNC Apps Guy 1 said:

I don't know why they choose to incorrectly refer to their "A" axis as "B" axis. That just chaps me. Hello... McFly... X,Y,Z,A,B,C. It's how it's supposed to be.

Got to indulge and take the opportunity to vent,  from repressed annoyance at how stupid and unnecessary this was by Haas. I programmed a couple of HS1's several years back, and programmers being a fastidious bunch, no surprise and a bit reassuring to know that it irked others too. What the heck was Haas' rationale for doing this?

[So not a Guru]

3 hours ago, pete_hull said:

What the heck was Haas' rationale for doing this?

I have always wondered that myself. It is one of the most consistent CNC rules; XYZ-ABC-UVW-IJK.