Boring issue

[Reverend Turk]

I am boring a reverse nose cone. I am drilling in first and then wanting to use a boring bar. The issue I am having is that the bore wants to rapid to the deepest part and bore from the inside out. This would crash the machine. I want to bore from the outside in to gently take away the left over stock from the drilling operation. Is there a way to do this?

[iowajim62]

Reverse Chain ? Regen

[Reverend Turk]

is that a question or an answer? I tried that to no avail

 

[ 12-08-2008, 02:31 PM: Message edited by: Turk@AFIT Model Fab Shop ]

[ATG]

can you put your file up on the ftp...

[Philcott]

Are you trying to just bore a cone with a larger diameter at Z zero tapering down in diameter as the cone goes deeper into the part?

 

If so, you should be able to do it by having the chain go from the large diameter at Z zero into the part. This will work for roughing as well as a finishing pass.

 

I would also turn reference point on and have it approach and retract to Z.1 or so.

 

Define stock and turn on "use stock as boundry" (or what ever the phrase is).

 

Phil

[Reverend Turk]

Phil, I will try that now. That is exactly what I am trying to do.

[Reverend Turk]

Ok..that did not seem to work. I will try and post it on the FTP and see if someone can tell me what it is I am doing wrong. It is the last two ops that I am really working with...BTW, this is my first time programming for a lathe on MC

[Reverend Turk]

Ok..so I can not upload the file to the FTP and I can't get the boring bar to start at the large end of the hole and work it's way down to the small end where the cone shape is. Why would the tool want to start so deep in the part and then back itself out when it would be easier to start at the large end and this way you work your way into the small section.

[Philcott]

If you can save it (as X2 file) and email it to me I'll have a look.

 

If you want to strip it down to just the bore so no secrets are being sent that's ok too.

 

Phil

[Reverend Turk]

No..this is not a secret part..just a test piece.

[Reverend Turk]

Ok..not sure what was happening but I regened it and it now does what I want but it keeps crashing toools on the verify? Like I said..first time programming a lathe and it is tough since I don't have a ton of lathe experience.

[Philcott]

Where is it crashing? On approach? At the end of a pass?

 

Make sure the boring bar you are using has clearance to go into the hole.

 

Play with lead in/lead out.

 

Are you using reference point?

 

phil

[JDowe]

Be sure to uas a reference point when boring

on lathe to prevent crashes

[Barry]

Check carefully that your tool is defined exactly as you are using it. Then make sure you define your stock acurately. Your stock definitiion greatly affects the way your tool will rapid in and out of the part. You probably know all this but it is something I overlooked when I started using lathe and I scratched my head quite a bit until I figured it out.

 

Bare

[Philcott]

The trouble he was having was the bore bar needed to come all the way down to X0.0 and did not have clearance to go there.