Threadmilling Toolpath Trouble

[Threept82]

Hi Guys

I'm having trouble with a thread mill output.

I want to start in ctr on i.d. thread come out 90 degrees with comp cut my helix and comp off back to center. In the parameters I have start in center,

perp. entry only. No helix lead in/out is checked

and it cuts a circular lead in /out anyway and its

F-in up the part because its cutting into the side of thread making look like its cross threaded

It takes gage fine. I finally cut a circle and added in the "z" by hand. Anyone know why it will not just turn on comp, helix and turn off comp.

[Guest]

Have you tried using the helix entry?

 

I don't think I have ever threadmilled without it being turned on.

 

Also use your entry/exit arc clearance as needed

[Kannon]

quote:

---

Also use your entry/exit arc clearance as needed

---

I think if you put it to 0 it will give you what your looking for.

[Doug Gabbey]

I think he wants to start in the center, go straight to the start of the thread without any @#$*$ arcs and start full revolutions until it is finished and the go straight to the center without any @#$*$ arcs.

I reported this last year and was told it was a bug. It appears it is still not fixed.

I wish they would fix it too.

Doug

[Kannon]

my file is doing exactly what your askin Doug...

I am usin version 9.1 if that matters...

I unchecked the helix..lead in/lead out, start at center and put a 0 value in my entry/exit arc clearance, and everything came out.

 

I will double check it in the a.m. when I am at the work pc..but I am almost certain its doing what your lookin for.

[Threept82]

Doug, Thats what I want to do.

Kannon, I tried that. No luck.

John, I dont want helix entry.

 

The bug in the machine wins.

Thanks guys.

[Midwest]

I'm not at work to try.......would "Wear" for cutter comp help???????

 

[Doug Gabbey]

Mark,

People are still complaining about this on the emastercam forum.

See thread milling problems on 3/28/07

Any progress yet?

Best regards,

Doug

----- Original Message -----

From: Mark Baker

To: Metalore Inc.

Sent: Tuesday, April 18, 2006 1:04 PM

Subject: RE: PERPENDICULAR ENTRY FROM CENTER IN THREAD MILLING

 

 

Doug,

 

 

 

I’ve logged it as bug 20229. If you find any other problems let me know.

 

 

 

Mark B

 

Application Engineer

 

CNC Software, Inc

 

 

 

 

--------------------------------------------------------------------------------

 

From: Metalore Inc.

Sent: Tuesday, April 18, 2006 3:33 PM

To: Mark Baker

Subject: Re: PERPENDICULAR ENTRY FROM CENTER IN THREAD MILLING

 

 

 

Mark,

 

I'm glad I made it clear.

 

I see what you have done and that works better but as you say it looks like a bug.

 

Can I get a bug report number so that I can track it?

 

Hope it gets fixed soon and thanks for taking a look at it.

 

Best regards,

 

Doug

[Doug Gabbey]

I am still hoping someone at CNC Software will comment on this bug.

Doug

[Doug Gabbey]

HELLO, ANYBODY AT CNC SOFTWARE READING HERE THIS WEEK?

I thought I would try "shouting" to attract someone's attention.

Doug

[Cuda84]

Sorry for the Hijack. I would like to know why 3.82? Sorry if someone has asked before, just curious. I always thought it was 42.

 

Somehow I think I've been here before.

 

[Pat-TGM]

Doug,

 

We just cut 2 1/2-8 NPT holes last week, without any problem.

 

Do you have specific sample ?

[Threept82]

G0X0Y0

Z-.5

G1G41X.5D35F16.

G3Y0I-.5Z-.375

G1G40X0

[Pat-TGM]

Please, specific what size of thread and dia of tool?

 

Thanks

[Threept82]

Its irrelevant. It doesn't do what I'm looking for at any size.

[Doug Gabbey]

Paul,

Read my post 4th from the top.

It always puts in some type of arc going from center start point to beginning of first thread.

We want it to go G1 to start of first thread and then make 360 degree cuts until it finishes.

It is the start up and end moves we don't want.

It appears to offer this in the menu but it does not work!.

Doug

[Pat-TGM]

I got you

[Doug Gabbey]

BUMP

[Threept82]

Bump?

[Doug Gabbey]

I am just "bumping" it up to the top again as nobody at CNCSoftware has reponded to this or to emails to Mark and [email protected].

I think after nearly a year it is not unreasonable to expect it to be fixed.

Best regardDoug

[Guest]

I am curious as to the thought process.

 

Why would you want to plunge straight into a thread in this manner and cause all that tool contact at one moment?

 

What the entry helix accomplishes is easing the cutter into the material.

 

Do you guys have a machine issue or is this just the way you want to do it?

[Threept82]

Vertical side slot in minor dia. Part requirement.

[R. C. Hinds]

Due to the problems I have experiences with threading I have come to use contour ramp. By setting the ramp as distance, thread pitch, and the availabilty of unlimited lead-in lead-out adjustments I can do just about any thread.

 

I have been doing top down threads and have never tried bottom up. I don't see why it would not work.

[Chris Bell CNC Software]

Sorry for the wait, guys.

 

This bug is still scheduled to be fixed. I added this information and pushed up the priority. Thanks for the input.

[Doug Gabbey]

Chris,

Thanks for the reply and email.

Best regards,

Doug