Trouble altering machine config to work with post processer

[sttech1]

Hello there,

I have a part that requires a unique setup and I’m have trouble altering the machine configuration (specifically the kinematics) to work with my post processor. It seems that the alterations I make to the kinematics don’t affect the post.

I have a BC trunnion, and I’d like to shift the B home position -90 degrees making it parallel to the x axis. This would accommodate the length of the part.

To give some context I’ve attached a picture of the part:

                The part is 24” long shaft with a taper and a keyway perpendicular to that taper. Ideally, I could just shift my home position for the B axis -90 degrees on the kinematics tab and that would be that. However, my post still assumes that the home position is parallel to the Z axis.

Any help would be greatly appreciated

[Garrett_Wade]

Are you talking about aligning B with X (like what would more commonly be referred to as an A axis)?
Or are you talking about rotating around B to a B-90 position?

[sttech1]

Rotating around B to a -90 position.

[sttech1]

 like this

[Garrett_Wade]

Makes sense what you've got going on now. Looks like Haas VM series machine.

I just attempted to do something similar with haas post and it doesn't seem to be posting home position for the rotation I put in the machine only X and and Y seem to be coming through.

[engineguy]

@sttech1 

This is most likely a very dumb question but can you set the B axis to the 90 degree position and set it as B0 in the control ??

That would then be an easy setup in Fusion to get the correct B +/- degrees position for the taper ??

[sttech1]

This is an option. And it's pretty much what I ended up doing. However I needed to manually edit all of my B and C moves. This was needed because the post/machine config assumed the table, trunnion's table and long length of the part we all parallel.

It would have been ideal if I could have shifted the home position of the trunnion -90 and made the long length of the part be perpendicular to that face.

Thanks for the response

[engineguy]

@sttech1 

Hmmm, does the attached file not work for you ? See images below 🙂

[sttech1]

I'll try that first thing tomorrow! Thanks!

[sttech1]

I've attached a file that's more representative of what I'm trying to do. 

It looks like you have a machine configuration defined with a B shift of -90 degrees. However when you posted the tool path you didn't select the box "use machine configuration". So maybe your post processor is shifting B?

Also if necessary I would like to keep the setup's WCS off the front of the taper to make probing easy.

 

I really appreciate the help!