Haas 4th axis and workshift

[ricktv2]

My part is a cylinder with small holes drilled radially around it and flats machined at various angles. The machine is a Haas with rotary axis rotating about X. I am using the generic Haas 4-axis post. The holes are drilled with a 2D toolpath with rotary positioning. I am defining the flats with toolplanes. When I post, the drills starts at G54 (correct) and drills the correct pattern. When the tool for the flats starts the post switches to the next workshift (G55) and with each subsiquent flat the workshift changes (G56). I can force G54 in parameters by changing the default work offset from -1 to 54. This does work but an alarm is generated during posting. Is there a better way to do this?

[CJep]

If you use the MpMaster post there is a misc value that forces the post to lock onto the first work coordinate value.

 

The reason your getting multiple work off sets has to due with how a post block called "pwcs" is handling the informatiion.

In the MpMaster post, the switch for miscellaneous integer #9 allows the post to by-pass the the information in the NCI telling it to create a new work offset.

[ricktv2]

Yes, it does seem like more of a warning and does work. It just isn't "clean". There was a suggestion to use a Fanuc post and force with misc. integers, what happened to the suggestion?

[CJep]

There was a suggestion to use a Fanuc post

 

The Gen Haas post is based on the Gen Fanuc they use the same "pwcs" format.

[Jayson Kramer]

to get your job going using the post you have use this option in the picture to set all offsets to the same so it will not change.

[Jayson Kramer]

Opps never mind. but maybe the picture will help another out there.

[ricktv2]

Thanks Jay, that worked. I didn't know that -1 foced a change.

[Jayson Kramer]

OH good I did help right on.

[RObert TImby]

You can right click the top of toolpath group (just above the properties) and you will see edit select operation and from there you left click, renumber work offsets. just make sure you have all the toolpath check first.