[chips4rylee]

Greetings,

Can anyone explain to me how to cut a thread using a Haas model S HA5C B
rotary indexer. I have a project that I need to get up on a mach. asap and have not done this programming method. Is this the same as "Spiral Milling"?

I am a bit confussed. Any help would be greatly appreciated.

Thread info:

1.938 part od
2.313 oal
.250 thread pitch (double lead thread), spaced .125 apart.
tool form: .114 wide full radius.
depth of thread: .066
1st thread must start at X location of -.1005 and end at X location of
X-2.1005,

2nd thread must start at X location of -.2255 and end at X location of
X-2.2255


Thank you,
chips4rylee

[Geof]

A drawing showing the complete part would be helpful, and an explanation for why you want to cut the thread using a fourth axis instead of simply using helical interpolation.

I am not surprised you are feeling confused. I cannot figure out any way to cut a thread on the fourth axis using a regular threading tool without using a right angle head.

[chips4rylee]

I'm sorry, I did not explain clearly. I am well aware that a "regular thread" tool is not capable of this. Based on the thread form, I was thinking to use a ball end mill rotating in the mini mill spindle, move to a specific location in x and y, drop down in z to thread depth. Then simultamiousely rotate the a," indexer" and move in the x axis to the end of thread," specific", location move z up and be done. The part will be held in the 4th axis indexer so that it rotates around the x axis. I would simply turn the thread on a lathe but the restricted start and end points won't allow that. A template showing the programming method would do, g code program. I can revise for specific thread call out.

Thanks for your reply,

[Geof]

Okay, I misunderstood. You are not doing a standard thread you a cutting a semicircular helical groove using a ball nose mill???

For a 0.250" lead you simply program the fourth axis to rotate 360 degrees while the X axis moves 0.250".

Moving from -0.1005 to -2.1005 is an X travel of 2.000, this is 8 x 0.25 so the command starting at X-0.1005 is G01 X-2.1005 A2880. Same idea starting at X-0.2255 going to X-2.2255.