Retraction on finish groove

[Nominal]

Fellow V9 users,

 

I love the groove lathe toolparth options, since they work pretty much the way I normally did grooves ( the plunging and finish contouring from both sides down to overlap the middle ). All I want to know is how to keep it from trying to retract from the bottom of the finish overlap at a 45 deg? You can control the entry of each side of the finish pass but I see no way of controlling the "lead out". I don't always have the room to retract at a 45 I'd rather it be perp.

Thanks in advance.

[jeff]

Try changing the backoff percentage to zero.

[McRae]

Use refpoints option on the first page of the toolpath. This will allow you to start above and return to the position you wish

[Nominal]

Jeff...backoff percentage is only available in the groove rough parameters. I'm not roughing in this case so roughing parameters are unselectable. We're talking about the finish passes only.

 

Andrew thanks I tried that to no avail. I activated the ref point turned off approach, turned on retract, turned on X, set it to 1.0, turned off Z and set it to incremental. Path looks exactly the way it did with the 45 retracts at the end. Did I do something wrong?

[McRae]

Try under groove finish - Disable roll around corners - change this to None.

 

I couldn't tell in the sample I made but combined with refpoints - it looked cool. Running backplot there is no intermediate move on a 45 as the tool retracts now.

 

[ 02-05-2003, 04:43 PM: Message edited by: Andrew McRae ]

[Nominal]

Thanks Andrew. Tried that but it doesn't help. I'm talking about how after each side of the groove is finished and the tool overlaps at the bottom it then retracts at feedrate on a 45 for some predetermined value ( probably hardcoded in mc) like .030 or so in XZ, then it rapids out straight. I don't want this little 45 feed out move at the end of the overlap. I don't think we can control it and its bugging the s*$t out of me.

[MATSSMan]

A wall backoff parameter has been added to Lathe 9.1 to take care of the situation that you are encountering.

[McRae]

Please send me this file, I am intrigued as when I created a simple "Chain" groove, there wasn't any intermediate 45 degree move after I disabled the rollaround corner option.

 

Are you using a chain or just points?